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NSR database version of March 18, 2024.

Search: Author = J.Pereira

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2024SP01      Phys.Rev. C 109, 014307 (2024)

M.Spieker, D.Bazin, S.Biswas, P.D.Cottle, P.J.Farris, A.Gade, T.Ginter, S.Giraud, K.W.Kemper, J.Li, S.Noji, J.Pereira, L.A.Riley, M.K.Smith, D.Weisshaar, R.G.T.Zegers

Proton removal from 73, 75Br to 72, 74Se at intermediate energies

doi: 10.1103/PhysRevC.109.014307
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2023GI06      Phys.Rev.Lett. 130, 232301 (2023)

S.Giraud, J.C.Zamora, R.G.T.Zegers, D.Bazin, Y.Ayyad, S.Bacca, S.Beceiro Novo, B.A.Brown, A.Carls, J.Chen, M.Cortesi, M.DeNudt, G.Hagen, C.Hultquist, C.Maher, W.Mittig, F.Ndayisabye, S.Noji, S.J.Novario, J.Pereira, Z.Rahman, J.Schmitt, M.Serikow, L.J.Sun, J.Surbrook, N.Watwood, T.Wheeler

β+ Gamow-Teller Strengths from Unstable 14O via the (d, 2He) Reaction in Inverse Kinematics

NUCLEAR REACTIONS 2H(14O, 2He), E=105 MeV/nucleon; measured reaction products. 14O; deduced σ(θ), B(GT) or Gamow-Teller transition strength. Comparison with available data. The Coupled Cyclotron Facility at the National Superconducting Cyclotron Laboratory (NSCL), MSU.

doi: 10.1103/PhysRevLett.130.232301
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Data from this article have been entered in the XUNDL database. For more information, click here.


2023RE02      Phys.Lett. B 838, 137704 (2023)

A.Revel, J.Wu, H.Iwasaki, J.Ash, D.Bazin, B.A.Brown, J.Chen, R.Elder, P.Farris, A.Gade, M.Grinder, N.Kobayashi, J.Li, B.Longfellow, T.Mijatovic, J.Pereira, A.Poves, A.Sanchez, N.Shimizu, M.Spieker, Y.Utsuno, D.Weisshaar

Large collectivity in 29Ne at the boundary of the island of inversion

NUCLEAR REACTIONS 181Ta, 9Be(29Ne, 29Ne'), E=101 MeV/nucleon; measured reaction products, Eγ, Iγ. 29Ne; deduced γ-ray energies, partial level scheme, B(E2). Comparison with shell-model calculations using FSU, SDPF-M, SDPF-U-MIX and EEdf1 interactions. The GRETINA array, the TRIPLEX device, the S800 Spectrograph facilitates at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University.

doi: 10.1016/j.physletb.2023.137704
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2023SP02      Phys.Lett. B 841, 137932 (2023)

M.Spieker, S.E.Agbemava, D.Bazin, S.Biswas, P.D.Cottle, P.J.Farris, A.Gade, T.Ginter, S.Giraud, K.W.Kemper, J.Li, W.Nazarewicz, S.Noji, J.Pereira, L.A.Riley, M.Smith, D.Weisshaar, R.G.T.Zegers

Hexadecapole strength in the rare isotopes 74, 76Kr

NUCLEAR REACTIONS 1H(74Kr, 74Kr'), (76Kr, 76Kr'), E(cm)=100 MeV, [secondary 74,76Kr beams from 9Be(78Kr, X), E=150 MeV/nucleon primary reaction, followed by separation of fragments using A1900 separator]; measured Doppler-corrected Eγ, Iγ, (particle)γ-coin using NSCL-MSU using NSCL/Ursinus Liquid Hydrogen (LH2) Target, eight GRETINA modules of 36-fold segmented HPGe detectors for γ radiation, and S800 spectrograph for projectile-like reaction residues. 74,76Kr; deduced levels, Jπ, β2 for the first 2+ state and β4 and B(E4)(W.u.) for the first 4+ state from inelastic proton scattering experiments in inverse kinematics. Comparison to coupled-channels calculations, and nuclear density functional theory (DFT) calculations using the Skyrme SkM* and UNEDF1 energy density functionals, covariant NL3* and DD-PC1 energy density functionals. Systematics and theoretical predictions of β2, β4 and B(E4)(W.u.) for 74,76,78,80,82,84,86Kr.

doi: 10.1016/j.physletb.2023.137932
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2023TS04      Phys.Rev. C 107, 035808 (2023)

A.Tsantiri, A.Palmisano-Kyle, A.Spyrou, P.Mohr, H.C.Berg, P.A.DeYoung, A.C.Dombos, P.Gastis, E.C.Good, C.M.Harris, S.N.Liddick, S.M.Lyons, O.Olivas-Gomez, G.Owens-Fryar, J.Pereira, A.L.Richard, A.Simon, M.K.Smith, R.G.T.Zegers

Cross-section measurement of the 82Kr(p, γ)83Rb reaction in inverse kinematics

NUCLEAR REACTIONS 1H(82Kr, γ)83Rb, E=3.1, 3.4, 3.7 MeV/nucleon; measured Eγ, Iγ, γ-sum, total absorption spectra; deduced σ(E), astrophysical S-factor. Comparison to NON-SMOKER and TALYS statistical model calculations. Hydrogen gas cell surrounded by the Summing NaI(Tl) (SuN) detector at ReA reaccelerator facility (NSCL).

doi: 10.1103/PhysRevC.107.035808
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2022AY04      Phys.Rev.Lett. 129, 012501 (2022)

Y.Ayyad, W.Mittig, T.Tang, B.Olaizola, G.Potel, N.Rijal, N.Watwood, H.Alvarez-Pol, D.Bazin, M.Caamano, J.Chen, M.Cortesi, B.Fernandez-DomInguez, S.Giraud, P.Gueye, S.Heinitz, R.Jain, B.P.Kay, E.A.Maugeri, B.Monteagudo, F.Ndayisabye, S.N.Paneru, J.Pereira, E.Rubino, C.Santamaria, D.Schumann, J.Surbrook, L.Wagner, J.C.Zamora, V.Zelevinsky

Evidence of a Near-Threshold Resonance in 11B Relevant to the β-Delayed Proton Emission of 11Be

NUCLEAR REACTIONS 1H(10Be, X)11B, E=350 keV/nucleon; measured reaction products, Ep, Ip, Eα, Iα. 11B; deduced σ(θ), resonance parameters. R-matrix analysis. The ReA3 reaccelerator facility of the National Superconducting Cyclotron Laboratory.

doi: 10.1103/PhysRevLett.129.012501
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2788. Data from this article have been entered in the XUNDL database. For more information, click here.


2022GI04      Phys.Rev. C 105, 044321 (2022)

S.A.Gillespie, K.W.Brown, R.J.Charity, L.G.Sobotka, A.K.Anthony, J.Barney, A.Bonaccorso, B.A.Brown, J.Crosby, D.Dell'Aquila, J.Elson, J.Estee, A.Gade, M.Ghazali, G.Jhang, Y.Jin, B.Longfellow, W.G.Lynch, J.Pereira, M.Spieker, S.Sweany, F.C.E.Teh, A.Thomas, M.B.Tsang, C.Y.Tsang, D.Weisshaar, H.Y.Wu, K.Zhu

Proton decay spectroscopy of 28S and 30Cl

NUCLEAR REACTIONS 9Be(29S, n), (31Ar, p), E=150 MeV/nucleon; measured reaction products, Ep, Ip, Eγ, Iγ, (particle)p-coin, pγ-coin; deduced invariant mass, momentum distribution. Setup consisting of S800 spectrograph, Si-CsI(Tl) DSSD array of 128 concentric rings and 128 annular sectors, CAESAR CsI(Na) photon detection array, BC-400-type scintillation fiber detector at A1900 fragment separator (NSCL).

RADIOACTIVITY 28S(p), (2p) [from 9Be(29S, n), E=150 MeV/nucleon]; 30Cl(p), (2p) [from 9Be(29S, n), E=150 MeV/nucleon]; measured Ep, Ip, Eγ, Iγ, pγ-coin; deduced total decay kinetic energy, decay energy spectrum. 30Cl; deduced levels, J, π, S(p). 28S; deduced levels, J, π, spectroscopic factors. Comparison to previous experimental results and shell model calculations.

doi: 10.1103/PhysRevC.105.044321
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2022ON02      Phys.Rev. C 105, 055803 (2022)

W.-J.Ong, M.L.Avila, P.Mohr, K.E.Rehm, D.Santiago-Gonzalez, J.Chen, C.R.Hoffman, Z.Meisel, F.Montes, J.Pereira

Measurement of the 100Mo (α, xn) cross section at weak $r$-process energies

NUCLEAR REACTIONS 4He(100Mo, xn);E(cm)=8.9-13.2 MeV; measured reaction products; deduced σ(E). 4He(100Mo, 2n), E=11.84-13.17; deduced σ(E).Comparison to other experimental data and Hauser-Feschbach calculations. The MUSIC detector at Argonne Tandem Linac Accelerator System (ATLAS) facility.

doi: 10.1103/PhysRevC.105.055803
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2768.


2022PA20      Phys.Rev. C 105, 065804 (2022)

A.Palmisano-Kyle, A.Spyrou, P.A.DeYoung, A.Dombos, P.Gastis, O.Olivas-Gomez, C.Harris, S.Liddick, S.M.Lyons, J.Pereira, A.L.Richard, A.Simon, M.K.Smith, A.Tsantiri, R.Zegers

Constraining the astrophysical p process: Cross section measurement of the 84Kr(p, γ)85Rb reaction in inverse kinematics

NUCLEAR REACTIONS 1H(84Kr, γ), E=2.8, 3.1, 3.4, 3.7 MeV/nucleon; measured Eγ, Ιγ, total absorption; deduced σ(E). Discussed the astrophysical impact, in particular on the 78Kr p-nuclei path. Comparison to NON-SMOKER and TALYS calculations and previous experimental data. Summing NaI(Tl) (SuN) detector and hydrogen-filled gas-cell target at Michigan State University ReAccelerator (ReA) facility (NSCL).

doi: 10.1103/PhysRevC.105.065804
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2773.


2022SC13      Phys.Rev. C 106, 054323 (2022)

J.Schmitt, G.B.King, R.G.T.Zegers, Y.Ayyad, D.Bazin, B.A.Brown, A.Carls, J.Chen, A.Davis, M.DeNudt, J.Droste, B.Gao, C.Hultquist, H.Iwasaki, S.Noji, S.Pastore, J.Pereira, M.Piarulli, H.Sakai, A.Stolz, R.Titus, R.B.Wiringa, J.C.Zamora

Probing spin-isospin excitations in proton-rich nuclei via the 11C(p, n)11N reaction

NUCLEAR REACTIONS 1H(11C, n), E=95 MeV/nucleon; measured reaction products, time-of-flight, En, In, (particle)n-coin, angular distribution; deduced σ(θ), σ(θ, E), cumulative Gamow-Teller transition strengths, B(GT) values to the 1/2- state at 0.73 MeV and the 3/2- state at 2.86 MeV in 11N. Multipole decomposition analysis. Comparison to shell-model calculations with wbp interaction and to experimental data on the 11B(n, p), (d, 2He), (t, 3He) reactions. Ursinus liquid hydrogen target coupled to Low Energy Neutron Detector Array (LENDA) and S800 spectrograph. 11C beam produced from Be(16O, X) reaction and purified with A1900 fragment separator at Coupled Cyclotron Facility (CCF) at the NSCL.

doi: 10.1103/PhysRevC.106.054323
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2022SP04      Phys.Rev. C 106, 054305 (2022)

M.Spieker, L.A.Riley, P.D.Cottle, K.W.Kemper, D.Bazin, S.Biswas, P.J.Farris, A.Gade, T.Ginter, S.Giraud, J.Li, S.Noji, J.Pereira, M.Smith, D.Weisshaar, R.G.T.Zegers

Investigation of octupole collectivity near the A = 72 shape-transitional point

NUCLEAR REACTIONS 1H(76Kr, p), (74Kr, p), (72Se, p), E(cm)≈ 100 MeV/nucleon; measured Eγ, Iγ, γγ-coin, angular distribution; deduced levels, J, π, B(E2), B(E3). Comparison to theoretical calculations performed in the framework of the configuration-mixing sdf IBM mapping approach. Systematics of B(E3) transition strength in Kr, Se and Ge isotopes. Established two regions of distinct octupole strengths with a sudden strength increase around the A = 72 prolate-oblate-triaxial shape-transitional point. Ursinus liquid hydrogen target coupled to 8 GRETINA modules, containing four, 36-fold segmented HPGe detectors each. Beams produced from a 150-MeV/nucleon 78Kr primary beam in projectile fragmentation on 9Be target at Coupled Cyclotron Facility NSCL.

doi: 10.1103/PhysRevC.106.054305
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2021DO03      Phys.Rev. C 103, 025810 (2021)

A.C.Dombos, A.Spyrou, F.Naqvi, S.J.Quinn, S.N.Liddick, A.Algora, T.Baumann, J.Brett, B.P.Crider, P.A.DeYoung, T.Ginter, J.Gombas, S.Lyons, T.Marketin, P.Moller, W.-J.Ong, A.Palmisano, J.Pereira, C.J.Prokop, P.Sarriguren, D.P.Scriven, A.Simon, M.K.Smith, S.Valenta

Total absorption spectroscopy of the β decay of 101, 102Zr and 109Tc

RADIOACTIVITY 101,102Zr, 109Tc(β-)[from 9Be(124Sn, X), E=120 MeV/nucleon, followed by separation of fragments using A1900 separator at NSCL-MSU]; measured Eγ, Iγ, implanted ions, (implants)γ-correlations using Summing NaI(Tl) (SuN) detector for total absorption spectroscopy; deduced β feedings as function of excitation energy, B(GT). Comparison with theoretical results from three different quasiparticle random-phase approximation (QRPA) models to investigate the ground-state shapes of the parent nuclei, and to test commonly used models that provide β-decay properties in r-process network calculations.

doi: 10.1103/PhysRevC.103.025810
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2021EL06      Phys.Rev. C 104, 024307 (2021)

R.Elder, H.Iwasaki, J.Ash, D.Bazin, P.C.Bender, T.Braunroth, C.M.Campbell, H.L.Crawford, B.Elman, A.Gade, M.Grinder, N.Kobayashi, B.Longfellow, T.Mijatovic, J.Pereira, A.Revel, D.Rhodes, D.Weisshaar

Lifetime measurements probing collectivity in the ground-state band of 32Mg

NUCLEAR REACTIONS 9Be(34Si, 32Mg), (34Si, 30Mg), E=60 MeV/nucleon, [secondary 34Si beam from 9Be(48Ca, X), E=140 meV/nucleon primary reaction, followed by separation of fragments using A1900 fragment separator at the NSCL-Coupled Cyclotron Facility]; measured reaction products by time-of-flight and energy-loss measurements using the S800 spectrograph, Eγ, Iγ, (32Mg)γ-coin, half-lives of the first 2+ and 4+ levels in 32Mg and first 2+ in 30Mg using GRETINA array for γ detection and TRIPLEX plunger device. 30,32Mg; deduced levels, J, π, B(E2). Comparison with shell-model calculations using SDPF-M, SDPF-U-MIX, AMPGCM, EKK, USDA and CHFB+LQRPA interactions, and with previous experimental B(E2) results. Systematics of measured B(E2) for first 2+ state in even-even Z=12 isotopes from N=16 to N=24, and those of theoretical B(E2) from N=16 to N=28.

doi: 10.1103/PhysRevC.104.024307
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Data from this article have been entered in the XUNDL database. For more information, click here.


2021GA01      Nucl.Instrum.Methods Phys.Res. A985, 164603 (2021)

P.Gastis, G.Perdikakis, G.P.A.Berg, A.C.Dombos, A.Estrade, A.Falduto, M.Horoi, S.N.Liddick, S.Lipschutz, S.Lyons, F.Montes, A.Palmisano, J.Pereira, J.S.Randhawa, T.Redpath, M.Redshaw, J.Schmitt, J.R.Sheehan, M.K.Smith, P.Tsintari, A.C.C.Villari, K.Wang, R.G.T.Zegers

A technique for the study of (p, n) reactions with unstable isotopes at energies relevant to astrophysics

NUCLEAR REACTIONS 1H(40Ar, n), E=3.52 MeV/nucleon; measured reaction products, En, In; deduced σ. Comparison with available data.

doi: 10.1016/j.nima.2020.164603
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2704.


2021GA15      Phys.Rev.Lett. 126, 152701 (2021)

B.Gao, S.Giraud, K.A.Li, A.Sieverding, R.G.T.Zegers, X.Tang, J.Ash, Y.Ayyad-Limonge, D.Bazin, S.Biswas, B.A.Brown, J.Chen, M.DeNudt, P.Farris, J.M.Gabler, A.Gade, T.Ginter, M.Grinder, A.Heger, C.Hultquist, A.M.Hill, H.Iwasaki, E.Kwan, J.Li, B.Longfellow, C.Maher, F.Ndayisabye, S.Noji, J.Pereira, C.Qi, J.Rebenstock, A.Revel, D.Rhodes, A.Sanchez, J.Schmitt, C.Sumithrarachchi, B.H.Sun, D.Weisshaar

New 59Fe Stellar Decay Rate with Implications for the 60Fe Radioactivity in Massive Stars

NUCLEAR REACTIONS 59Co(t, 3He)59Fe, E=115 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, σ(θ), B(GT), β-decay rates. Comparison with stellar evolution calculations.

doi: 10.1103/PhysRevLett.126.152701
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Data from this article have been entered in the XUNDL database. For more information, click here.


2021GO10      Phys.Rev. C 103, 035803 (2021)

J.Gombas, P.A.DeYoung, A.Spyrou, A.C.Dombos, A.Algora, T.Baumann, B.Crider, J.Engel, T.Ginter, E.Kwan, S.N.Liddick, S.Lyons, F.Naqvi, E.M.Ney, J.Pereira, C.Prokop, W.Ong, S.Quinn, D.P.Scriven, A.Simon, C.Sumithrarachchi

β-decay feeding intensity distributions for 103, 104mNb

RADIOACTIVITY 103,104mNb(β-)[from 9Be(124Sn, X), E not given, followed by separation of fragments using A1900 separator at NSCL-MSU]; measured reaction products and particle identification plot from 9Be(124Sn, X), Eγ, Iγ, total absorption gamma spectra from the decays of 103Nb and 104mNb using Summing NaI(Tl) (SuN) detector at the NSCL-MSU; deduced Iβ feedings to levels in 103Mo and 104Mo, cumulative B(GT) values. Comparison to predictions of quasiparticle random-phase approximation (QRPA) model. Relevance to antineutrino studies of nuclear reactors, and astrophysical r process.

doi: 10.1103/PhysRevC.103.035803
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Data from this article have been entered in the XUNDL database. For more information, click here.


2021HI09      Phys.Rev. C 104, 014305 (2021)

A.M.Hill, A.Gade, D.Bazin, B.A.Brown, B.Elman, P.Farris, J.Li, B.Longfellow, J.Pereira, A.Revel, D.Rhodes, M.Spieker, D.Weisshaar

In-beam γ-ray spectroscopy of 37-42P

NUCLEAR REACTIONS 12C(45Cl, X), 37P/38P/39P/40P/41P/42P, E=62.5 MeV/nucleon, [secondary 45Cl beam produced in 9Be(48Ca, X), E=140 MeV/nucleon primary reaction at NSCL-MSU, followed by separation of fragments using A1900 fragment separator]; measured reaction products and particle identification spectra by energy loss and time-of-flight using S800 spectrograph, ionization chamber and plastic scintillators, Eγ, Iγ, γγ- and (particle)g-coin, T1/2 of levels by Doppler shifts using GRETINA array of four 36-fold segmented HPGe crystals. 37,38,39,40,41,42P; deduced levels, J, π, γ-branching ratios, Nilsson configurations of low-lying levels. Comparison with shell-model calculations.

NUCLEAR STRUCTURE 37,38,39,40,41,42P; calculated levels, J, π, T1/2 of levels, level schemes with γ transitions, E2 matrix elements, B(M1), B(E2), magnetic dipole and electric quadrupole moments using shell-model with SDPF-MU interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.104.014305
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Data from this article have been entered in the XUNDL database. For more information, click here.


2021LO08      Phys.Rev. C 103, 054309 (2021)

B.Longfellow, D.Weisshaar, A.Gade, B.A.Brown, D.Bazin, K.W.Brown, B.Elman, J.Pereira, D.Rhodes, M.Spieker

Quadrupole collectivity in the neutron-rich sulfur isotopes 38, 40, 42, 44S

NUCLEAR REACTIONS 209Bi(38S, 38S'), E=75 MeV; 209Bi(40S, 40S'), E=76 MeV; 209Bi(42S, 42S'), E=80 MeV; 209Bi(44S, 44S'), E=73 MeV, [secondary 38,40,42,44S beams from 9Be(48Ca, X), E=140 MeV/nucleon primary reaction, followed by separation of fragments using A1900 fragment separator at the NSCL-MSU facility]; measured reaction products, particle identification from energy loss and time of flight, Eγ, Iγ, (scattered S ions)γ-coin using S800 spectrograph for particles and CAESAR array of 192 CsI(Na) detectors for γ rays in intermediate-energy Coulomb excitation. 38,40,42,44S; deduced levels, B(E2) for the first 2+ states from Coulomb excitation yields and Alder-Winther model. Comparison with previous experimental results, and with predictions of shell-model calculations using the SDPF-MU Hamiltonian. Systematics of B(E2) values for the first 2+ states in 36,38,40,42,44,46S, 36,38,40,42,44,46,48Ar, 42,44,46,48,50Ca.

doi: 10.1103/PhysRevC.103.054309
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Data from this article have been entered in the XUNDL database. For more information, click here.


2021ZA06      Phys.Rev. C 104, 014607 (2021)

J.C.Zamora, C.Sullivan, R.G.T.Zegers, N.Aoi, L.Batail, D.Bazin, M.Carpenter, J.J.Carroll, Y.D.Fang, H.Fujita, U.Garg, G.Gey, C.J.Guess, M.N.Harakeh, T.H.Hoang, E.Hudson, N.Ichige, E.Ideguchi, A.Inoue, J.Isaak, C.Iwamoto, C.Kacir, N.Kobayashi, T.Koike, M.Kumar Raju, S.Lipschutz, M.Liu, P.von Neumann-Cosel, S.Noji, H.J.Ong, S.Peru, J.Pereira, J.Schmitt, A.Tamii, R.Titus, V.Werner, Y.Yamamoto, X.Zhou, S.Zhu

Investigation of the isoscalar response of 24Mg to 6Li scattering

NUCLEAR REACTIONS 24Mg(6Li, 6Li'), E=100 MeV/nucleon; measured scattered 6Li particles, σ(θ) using Grand Raiden spectrometer and two position-sensitive multiwire drift chambers (MWDCs) and three plastic scintillators for particle identification and reconstructing their trajectories at RCNP-Osaka University; deduced differential σ(E, Q), angular momentum transfers by fitting with multipole-decomposition analysis (MDA) using DWBA calculations for angular-momentum transfers. 24Mg; deduced energies, widths, EWSR, isoscaler giant monopole resonance (ISGMR), isoscaler giant monopole resonance (ISGDR), isoscaler giant quadrupole resonance (ISGQR) strength functions from Lorentzian fits to data. Comparison with antisymmetrized molecular dynamics (AMD) calculations, and with previous experimental data.

doi: 10.1103/PhysRevC.104.014607
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2709. Data from this article have been entered in the XUNDL database. For more information, click here.


2020BL01      Phys.Rev. C 101, 055807 (2020)

J.Bliss, A.Arcones, F.Montes, J.Pereira

Nuclear physics uncertainties in neutrino-driven, neutron-rich supernova ejecta

NUCLEAR REACTIONS 59,68Fe, 63,71Co, 74,76Ni, 67,77Cu, 72,76,78,79,80Zn, 81Ga, 78,80,82Ge, 83As, 84,85Se, 85,87,88Br, 86,87,88,89,90Kr, 87,89Rb, 88,89,90,91,92,93,94Sr, 94,95Y, 94,95,96,97,98Zr, 97Nb(α, n), T=1-5 GK; calculated abundances of lighter heavy elements with a reaction network under different astrophysical conditions, by varying (α, n) reaction rates within their theoretical uncertainties using a Monte Carlo approach; deduced Spearman's correlation coefficients for Z=36-47, and most important (α, n) reactions affecting the nucleosynthesis in core-collapse supernovae (CCSNe).

doi: 10.1103/PhysRevC.101.055807
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2020CI04      Phys.Rev. C 101, 034305 (2020)

A.A.Ciemny, W.Dominik, T.Ginter, R.Grzywacz, Z.Janas, M.Kuich, C.Mazzocchi, M.Pfutzner, M.Pomorski, D.Bazin, T.Baumann, A.Bezbakh, B.P.Crider, M.Cwiok, S.Go, G.Kaminski, K.Kolos, A.Korgul, E.Kwan, S.Liddick, K.Miernik, S.V.Paulauskas, J.Pereira, T.Roginski, K.Rykaczewski, C.Sumithrarachchi, Y.Xiao, H.Schatz, P.Sarriguren

First identification of 58Zn β-delayed proton emission

RADIOACTIVITY 57,58Zn(β+), (β+p)[from 9Be(78Kr, X), followed by separation of fragments using A1900 separator]; measured reaction products, Ep, Ip, β-delayed proton branching ratio, half-life of 57Zn decay using the Warsaw Optical Time Projection Chamber (OTPC) with energy loss and time-of-flight method for particle identification at the NSCL-MSU facility. 58Cu; deduced levels, J, π, β+p branching ratios, B(GT) for 1+ states. Comparison with experimental B(GT) values from 58Ni(3He, t)58Cu reaction, and with QRPA calculations.

doi: 10.1103/PhysRevC.101.034305
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020GA02      Phys.Rev. C 101, 014308 (2020)

B.Gao, R.G.T.Zegers, J.C.Zamora, D.Bazin, B.A.Brown, P.Bender, H.L.Crawford, J.Engel, A.Falduto, A.Gade, P.Gastis, T.Ginter, C.J.Guess, S.Lipschutz, A.O.Macchiavelli, K.Miki, E.M.Ney, B.Longfellow, S.Noji, J.Pereira, J.Schmitt, C.Sullivan, R.Titus, D.Weisshaar

Gamow-Teller transitions to 93Zr via the 93Nb (t, 3He + γ) reaction at 115 MeV/u and its application to the stellar electron-capture rates

NUCLEAR REACTIONS 93Nb(t, 3He), E=115 MeV/nucleon; measured 3He particle spectra, Eγ, double-differential σ(θ) using S800 spectrograph and GRETINA array at NSCL-MSU Coupled Cyclotron Facility. 93Zr; deduced levels, L-transfer, J, π, B(GT), electron capture (EC) rates in the late evolution of core-collapse supernovae, DWBA and multipole decomposition analysis (MDA). Comparison with QRPA and shell-model calculations.

doi: 10.1103/PhysRevC.101.014308
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2020LO12      Phys.Rev.Lett. 125, 232501 (2020)

B.Longfellow, D.Weisshaar, A.Gade, B.A.Brown, D.Bazin, K.W.Brown, B.Elman, J.Pereira, D.Rhodes, M.Spieker

Shape Changes in the N = 28 Island of Inversion: Collective Structures Built on Configuration-Coexisting States in 43S

NUCLEAR REACTIONS 209Bi(43S, 43S'), E=76 MeV/nucleon; measured reaction products, Eγ, Iγ. 43S; deduced γ-ray energies and intensities, J, π, B(E2) strengths. Comparison with SDPF-U and SDPF-MU shell-model calculations.

doi: 10.1103/PhysRevLett.125.232501
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2020ME06      Phys.Rev. C 101, 052801 (2020)

Z.Meisel, S.George, S.Ahn, D.Bazin, B.A.Brown, J.Browne, J.F.Carpino, H.Chung, R.H.Cyburt, A.Estrade, M.Famiano, A.Gade, C.Langer, M.Matos, W.Mittig, F.Montes, D.J.Morrissey, J.Pereira, H.Schatz, J.Schatz, M.Scott, D.Shapira, K.Smith, J.Stevens, W.Tan, O.Tarasov, S.Towers, K.Wimmer, J.R.Winkelbauer, J.Yurkon, R.G.T.Zegers

Nuclear mass measurements map the structure of atomic nuclei and accreting neutron stars

ATOMIC MASSES 48,49Ar, 52,53,54,55,56,57Sc, 56,57,58,59Ti, 57,58,59,60,61,62V, 64,65Cr, 67,68Mn, 67,68,69,70Fe; measured time of flight, ΔE, Bπ, and mass excess using the A1900 fragment separator and the S800 spectrograph for particle identification at the NSCL-MSU facility; deduced S(2n), and Dn(Z, A)=S(n)(Z, A+1)-S(n)(Z, A), related to pairing gap. Comparison with available evaluated data in AME2016, and with shell model calculations using GX1A Hamiltonian for Sc isotopes. Discussion of upper-Z limit for N=34 subshell closure and lower-Z limit for N=40 subshell, and impact on electron-capture cooling in neutron star crusts. Isotopes produced in 9Be(82Se, X), E=140 MeV/nucleon reaction.

doi: 10.1103/PhysRevC.101.052801
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2020ON01      Phys.Rev.Lett. 125, 262701 (2020)

W.-J.Ong, E.F.Brown, J.Browne, S.Ahn, K.Childers, B.P.Crider, A.C.Dombos, S.S.Gupta, G.W.Hitt, C.Langer, R.Lewis, S.N.Liddick, S.Lyons, Z.Meisel, P.Moller, F.Montes, F.Naqvi, J.Pereira, C.Prokop, D.Richman, H.Schatz, K.Schmidt, A.Spyrou

β Decay of 61V and its Role in Cooling Accreted Neutron Star Crusts

RADIOACTIVITY 61V(β-), (β-n) [from 9Be(82Se, X), E=140 MeV/nucleon]; measured decay products, Eγ, Iγ, En, In; deduced branching for β-delayed neutron emission, β-feeding intensities, B(GT) strengths, log ft.

doi: 10.1103/PhysRevLett.125.262701
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2020RA24      Phys.Rev.Lett. 125, 202701 (2020)

J.S.Randhawa, Y.Ayyad, W.Mittig, Z.Meisel, T.Ahn, S.Aguilar, H.Alvarez-Pol, D.W.Bardayan, D.Bazin, S.Beceiro Novo, D.Blankstein, L.Carpenter, M.Cortesi, D.Cortina-Gil, P.Gastis, M.Hall, S.Henderson, J.J.Kolata, T.Mijatovic, F.Ndayisabye, P.O'Malley, J.Pereira, A.Pierre, H.Robert, C.Santamaria, H.Schatz, J.Smith, N.Watwood, J.C.Zamora

First Direct Measurement of 22Mg(α, p)25Al and Implications for X-Ray Burst Model-Observation Comparisons

NUCLEAR REACTIONS 4He(22Mg, p), E ∼ 5 MeV/nucleon; measured reaction products, Ep, Ip; deduced σ, reaction rates. Comparison with Non-Smoker calculations, available data.

doi: 10.1103/PhysRevLett.125.202701
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2020VO08      Phys.Rev. C 102, 014325 (2020)

D.Votaw, P.A.DeYoung, T.Baumann, A.Blake, J.Boone, J.Brown, D.Chrisman, J.E.Finck, N.Frank, J.Gombas, P.Gueye, J.Hinnefeld, H.Karrick, A.N.Kuchera, H.Liu, B.Luther, F.Ndayisabye, M.Neal, J.Owens-Fryar, J.Pereira, C.Persch, T.Phan, T.Redpath, W.F.Rogers, S.Stephenson, K.Stiefel, C.Sword, A.Wantz, M.Thoennessen

Low-lying level structure of the neutron-unbound N=7 isotones

NUCLEAR REACTIONS 9Be(11Be, 8He), (11Be, 9Li), E=44 MeV/nucleon; 9Be(12B, 8He), (12B, 9Li), E=45 MeV/nucleon, [secondary 11Be and 12B beams from 9Be(16O, X), E=120 MeV/nucleon, followed by separation of ions of interest using A1900 Fragment Separator at the Coupled Cyclotron Facility of NSCL-MSU]; measured E(n), I(n), charged-particles, (particle)n-coin using the MoNA-LISA detector array for neutron detection and cathode readout drift chambers (CRDCs) for charged particles; deduced decay energy spectra of 9He and 10Li and neutron-unbound states. 9He, 10Li; deduced levels, resonances, widths, J, π, l-values of neutrons from the resonances in 9He and 10Li. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.102.014325
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2020ZA05      Phys.Rev. C 101, 064609 (2020)

J.C.Zamora, C.Sullivan, R.G.T.Zegers, N.Aoi, L.Batail, D.Bazin, M.Carpenter, J.J.Carroll, I.Deloncle, Y.D.Fang, H.Fujita, U.Garg, G.Gey, C.J.Guess, M.N.Harakeh, T.H.Hoang, E.Hudson, N.Ichige, E.Ideguchi, A.Inoue, J.Isaak, C.Iwamoto, C.Kacir, N.Kobayashi, T.Koike, M.Kumar Raju, S.Lipschutz, M.Liu, P.von Neumann-Cosel, S.Noji, H.J.Ong, S.Peru, J.Pereira, J.Schmitt, A.Tamii, R.Titus, V.Werner, Y.Yamamoto, X.Zhou, S.Zhu

Reexamination of isoscalar giant resonances in 12C and 93Nb through 6Li scattering

NUCLEAR REACTIONS 12C, 93Nb(6Li, 6Li'), E=100 MeV/nucleon; measured 6Li spectra, double-differential σ, and angular distributions for the isoscalar giant monopole resonances (ISGMRs) using the high-resolution Grand Raiden magnetic spectrometer at the RCNP-Osaka facility; deduced contribution of different angular momentum transfers to differential σ, energies, widths and E0 strength distribution of GMRs, EWSR, influence on GMRs due to nuclear structure. Angular distribution data fitted using multipole-decomposition analysis (MDA) and DWBA methods. Comparison with antisymmetrized molecular dynamics (AMD) calculations, and with previous experimental data.

doi: 10.1103/PhysRevC.101.064609
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2019DO02      Phys.Rev. C 99, 015802 (2019)

A.C.Dombos, A.Spyrou, F.Naqvi, S.J.Quinn, S.N.Liddick, A.Algora, T.Baumann, J.Brett, B.P.Crider, P.A.DeYoung, T.Ginter, J.Gombas, E.Kwan, S.Lyons, W.-J.Ong, A.Palmisano, J.Pereira, C.J.Prokop, D.P.Scriven, A.Simon, M.K.Smith, C.S.Sumithrarachchi

β-decay half-lives of neutron-rich nuclides in the A=100--110 mass region

RADIOACTIVITY 99Y, 101,102Zr, 102m,103,104mNb, 109Tc(β-)[from 9Be(124Sn, X), E=120 MeV/nucleon, followed by separation of reaction products using A1900 fragment separator]; measured (implants)γ-coin, time-of-flight, total energy loss of fragments, and half-lives from (implants)γ-correlated decay curves using the implantation station installed inside the Summing NaI(Tl) (SuN) detector for the total absorption spectroscopy (TAS) technique at the NSCL-MSU facility. Comparison with previous experimental values; compiled measured and evaluated half-lives in literature for the seven isotopes studied in this work. Relevance to B(GT) distributions, nuclear astrophysics, nuclear structure, and nuclear technology.

doi: 10.1103/PhysRevC.99.015802
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2019EL09      Phys.Rev. C 100, 041301 (2019)

R.Elder, H.Iwasaki, J.Ash, D.Bazin, P.C.Bender, T.Braunroth, B.A.Brown, C.M.Campbell, H.L.Crawford, B.Elman, A.Gade, M.Grinder, N.Kobayashi, B.Longfellow, A.O.Macchiavelli, T.Mijatovic, J.Pereira, A.Revel, D.Rhodes, J.A.Tostevin, D.Weisshaar

Intruder dominance in the 0+2 state of 32Mg studied with a novel technique for in-flight decays

NUCLEAR REACTIONS 9Be(34Si, 32Mg), (34Si, 31Mg), E=86 MeV/nucleon, [secondary 34Si beam from 9Be(48Ca, X), E=140 MeV/nucleon and separated using A1900 fragment separator at NSCL-MSU]; measured reaction products identified by time-of-flight and energy-loss measurements using the S800 spectrograph, Eγ, Iγ, (particle)γ-coin, level half-life for the first excited 0+ state using GRETINA array. 32Mg; deduced levels, excited 0+ level, B(E2) for excited 0+ to the first 2+ state. Comparison with B(E2) values for the first 2+ and excited 0+ states in 30,32Mg and 34Si. New method to study isomeric states decaying in-flight. Discussed collective behavior of the first excited 0+ state in 32Mg. 31Mg; deduced levels, isomer half-life.

doi: 10.1103/PhysRevC.100.041301
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2019HO18      J.Phys.(London) G46, 083001 (2019)

C.J.Horowitz, A.Arcones, B.Cote, I.Dillmann, W.Nazarewicz, I.U.Roederer, H.Schatz, A.Aprahamian, D.Atanasov, A.Bauswein, T.C.Beers, J.Bliss, M.Brodeur, J.A.Clark, A.Frebel, F.Foucart, C.J.Hansen, O.Just, A.Kankainen, G.C.McLaughlin, J.M.Kelly, S.N.Liddick, D.M.Lee, J.Lippuner, D.Martin, J.Mendoza-Temis, B.D.Metzger, M.R.Mumpower, G.Perdikakis, J.Pereira, B.W.O'Shea, R.Reifarth, A.M.Rogers, D.M.Siegel, A.Spyrou, R.Surman, X.Tang, T.Uesaka, M.Wang

r-process nucleosynthesis: connecting rare-isotope beam facilities with the cosmos

doi: 10.1088/1361-6471/ab0849
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2019KA44      Phys.Lett. B 797, 134803 (2019)

D.Kahl, P.J.Woods, T.Poxon-Pearson, F.M.Nunes, B.A.Brown, H.Schatz, T.Baumann, D.Bazin, J.A.Belarge, P.C.Bender, B.Elman, A.Estrade, A.Gade, A.Kankainen, C.Lederer-Woods, S.Lipschutz, B.Longfellow, S.-J.Lonsdale, E.Lunderberg, F.Montes, W.J.Ong, G.Perdikakis, J.Pereira, C.Sullivan, R.Taverner, D.Weisshaar, R.Zegers

Single-particle shell strengths near the doubly magic nucleus 56Ni and the 56Ni(p, γ)57Cu reaction rate in explosive astrophysical burning

NUCLEAR REACTIONS 2H(56Ni, n), (56Ni, p), E=33.6 MeV/nucleon; measured reaction products, Eγ, Iγ. 57Cu; deduced σ, spectroscopic factors, resonance parameters, astrophysical reaction rates.

doi: 10.1016/j.physletb.2019.134803
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2019RI03      Phys.Rev. C 100, 044312 (2019); Erratum Phys.Rev. C 101, 059902 (2020)

L.A.Riley, D.Bazin, J.Belarge, P.C.Bender, B.A.Brown, P.D.Cottle, B.Elman, A.Gade, S.D.Gregory, E.B.Haldeman, K.W.Kemper, B.R.Klybor, M.A.Liggett, S.Lipschutz, B.Longfellow, E.Lunderberg, T.Mijatovic, J.Pereira, L.M.Skiles, R.Titus, A.Volya, D.Weisshaar, J.C.Zamora, R.G.T.Zegers

Inverse-kinematics proton scattering from 42, 44S, 41, 43P, and the collapse of the N=28 major shell closure

NUCLEAR REACTIONS 1H(42S, 42S'), E=62 MeV/nucleon; 1H(44S, 44S'), E=70 MeV/nucleon; 1H(41P, 41P'), E=58 MeV/nucleon; 1H(43P, 43P'), E=65 MeV/nucleon, [secondary 42,44S, 41,43P beams from 9Be(48Ca, X), E=140 MeV/nucleon followed by separation using A1900 fragment separator at NSCL-MSU]; measured reaction products, Eγ, Iγ, (particle)γ-coin using S-800 high resolution magnetic spectrograph, and GRETINA array. 42,44S, 41,43P; deduced levels, J, π, scattering σ, deformation lengths and ratio of neutron-to-proton transition matrix elements for 42,44S. Optical model analysis. Comparison with shell-model calculations using SDPF-U and SDPF-MU interactions, and with previous experimental results. Systematics of deformation lengths in 36,38,40,42,44S. Systematics of ratios of neutron to proton transition matrix elements in 42,44,48,50Ca, 40,42,44,46Ar, 36,38,40,42,44,46S, 36,38Si.

doi: 10.1103/PhysRevC.100.044312
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2019TI09      Phys.Rev. C 100, 045805 (2019)

R.Titus, E.M.Ney, R.G.T.Zegers, D.Bazin, J.Belarge, P.C.Bender, B.A.Brown, C.M.Campbell, B.Elman, J.Engel, A.Gade, B.Gao, E.Kwan, S.Lipschutz, B.Longfellow, E.Lunderberg, T.Mijatovic, S.Noji, J.Pereira, J.Schmitt, C.Sullivan, D.Weisshaar, J.C.Zamora

Constraints for stellar electron-capture rates on 86Kr via the 86Kr(t, 3He+γ)86Br reaction and the implications for core-collapse supernovae

NUCLEAR REACTIONS 86Kr, 12C, 14N(t, 3He), E=115 MeV/nucleon, [tritons from 9Be(16O, X), E=150 MeV/nucleon primary reaction, and separated using A1900 fragment separator]; measured 3He spectra, Eγ, Iγ, γγ- and (3He)γ-coin, differential σ(θ) using S800 spectrograph for particles and GRETINA array for γ detection at the NSCL-MSU facility. Data from 12C 14N present as contaminants used for energy calibration. 86Br; deduced levels, L-transfers, Gamow-Teller strength distributions. 86Kr; calculated electron capture rates at T=10 GK using the deduced Gamow-Teller strength distributions. Comparison with shell-model and quasiparticle random-phase approximation (QRPA) calculations. Z=26-41, N=75-93; calculated electron capture rates for 78 nuclides near N=50 and Z=28 (see 2018Ti02) using quasiparticle random-phase approximation (QRPA), with Jπ assignments made for ground states of some nuclides using Gallagher-Moszkowski (GM) rule. Relevance to astrophysical simulations of core-collapse supernovae.

doi: 10.1103/PhysRevC.100.045805
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2019WA18      Phys.Rev. C 99, 054625 (2019)

D.Walter, S.D.Pain, J.A.Cizewski, F.M.Nunes, S.Ahn, T.Baugher, D.W.Bardayan, T.Baumann, D.Bazin, S.Burcher, K.A.Chipps, G.Cerizza, K.L.Jones, R.L.Kozub, S.J.Lonsdale, B.Manning, F.Montes, P.D.O'Malley, S.Ota, J.Pereira, A.Ratkiewicz, P.Thompson, C.Thornsberry, S.Williams

Constraining spectroscopic factors near the r-process path using combined measurements: 86Kr (d, p) 87Kr

NUCLEAR REACTIONS 2H(86Kr, p), E=33 MeV/nucleon; measured Ep, Ip, recoils, (recoils)p-coin, differential σ(θ) using the Oak Ridge Rutgers University Barrel Array (ORRUBA) coupled to the S800 magnetic spectrograph at the NSCL-MSU facility. 87Kr; deduced levels, J, π, L-transfer, single-particle asymptotic normalization coefficients (ANCs) and spectroscopic factors for the ground, first 1/2+, and 7/2+ states. Comparison with FR-ADWA analysis with KD optical model parameters, and with previous experimental results at E=5.5 MeV/nucleon.

doi: 10.1103/PhysRevC.99.054625
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2019WO01      Phys.Rev.Lett. 122, 232701 (2019)

C.Wolf, C.Langer, F.Montes, J.Pereira, W.-J.Ong, T.Poxon-Pearson, S.Ahn, S.Ayoub, T.Baumann, D.Bazin, P.C.Bender, B.A.Brown, J.Browne, H.Crawford, R.H.Cyburt, E.Deleeuw, B.Elman, S.Fiebiger, A.Gade, P.Gastis, S.Lipschutz, B.Longfellow, Z.Meisel, F.M.Nunes, G.Perdikakis, R.Reifarth, W.A.Richter, H.Schatz, K.Schmidt, J.Schmitt, C.Sullivan, R.Titus, D.Weisshaar, P.J.Woods, J.C.Zamora, R.G.T.Zegers

Constraining the Neutron Star Compactness: Extraction 23Al(p, γ) Reaction Rate for the rp Process

NUCLEAR REACTIONS 2H(23Al, n), E=48 MeV/nucleon; measured reaction products, En, In, Eγ, Iγ; deduced J, π, σ, σ(θ), resonance widths and spectroscopic strengths, reaction rates.

doi: 10.1103/PhysRevLett.122.232701
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2019ZA07      Phys.Rev. C 100, 032801(R) (2019)

J.C.Zamora, R.G.T.Zegers, SamM.Austin, D.Bazin, B.A.Brown, P.C.Bender, H.L.Crawford, J.Engel, A.Falduto, A.Gade, P.Gastis, B.Gao, T.Ginter, C.J.Guess, S.Lipschutz, B.Longfellow, A.O.Macchiavelli, K.Miki, E.Ney, S.Noji, J.Pereira, J.Schmitt, C.Sullivan, R.Titus, D.Weisshaar

Experimental constraint on stellar electron-capture rates from the 88Sr(t, 3He + γ) 88Rb reaction at 115 MeV/u

NUCLEAR REACTIONS 88Sr(t, 3He)88Rb, E=115 MeV/nucleon, [secondary triton beam from 9Be(16O, X), E=150 MeV/nucleon using Coupled Cyclotron Facility and A1900 fragment separator at NSCL-MSU]; measured 3He ejectiles, angular distributions using S800 spectrograph, and Eγ, Iγ using GRETINA array; deduced double-differential cross sections, L-transfers from fitting of the σ(θ) distributions in the multipole decomposition analysis (MDA), two-dimensional histogram of γ-ray energy versus excitation energy of 88Rb. 88Sr; deduced B(GT) strength distributions, electron capture (EC) rates on 88Sr as a function of stellar density at a temperature of 10 GK. 86,87,88Rb; deduced transitions. 12C(t, 3He)12B, E=115 MeV/nucleon; measured 3He ejectiles, reaction used for calibration and for absolute measurement of the triton beam intensity. Comparison of experimental EC rates on 88Sr with shell model and QRPA calculations. Relevance to the late evolution of core-collapse supernovae.

doi: 10.1103/PhysRevC.100.032801
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2018SU14      Phys.Rev. C 98, 015804 (2018)

C.Sullivan, R.G.T.Zegers, S.Noji, SamM.Austin, J.Schmitt, N.Aoi, D.Bazin, M.Carpenter, J.J.Carroll, H.Fujita, U.Garg, G.Gey, C.J.Guess, T.H.Hoang, M.N.Harakeh, E.Hudson, N.Ichige, E.Ideguchi, A.Inoue, J.Isaak, C.Iwamoto, C.Kacir, T.Koike, N.Kobayashi, S.Lipschutz, M.Liu, P.von Neumann-Cosel, H.J.Ong, J.Pereira, M.Kumar Raju, A.Tamii, R.Titus, V.Werner, Y.Yamamoto, Y.D.Fang, J.C.Zamora, S.Zhu, X.Zhou

The (6Li, 6Li* [3.56 MeV]) reaction at 100 MeV/u as a probe of Gamow-Teller transition strengths in the inelastic scattering channel

NUCLEAR REACTIONS 12C(6Li, 6Li'), E=100 MeV/nucleon; measured Eγ, Iγ, 6Li scattered particles, (6Li)γ-coin, double differential σ(θ, Eex) using CAGRA detector array for γ detection, and Grand Raiden magnetic spectrometer for analysis of charged particles at RCNP-Osaka; deduced Doppler-corrected (6Li)γ-coin spectrum, Gamow-Teller strengths, and isovector spin-transfer response in inelastic reaction channel by tagging the reaction with the 3.56-MeV γ-ray from the excited state of 6Li. 24Mg, 93Nb(6Li, 6Li'), E=100 MeV/nucleon; reactions used for calibration, also it was not possible to isolate the isovector spin transfer excitations in the inelastic channel.

doi: 10.1103/PhysRevC.98.015804
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2018TA08      Eur.Phys.J. A 54, 66 (2018)

O.B.Tarasov, O.Delaune, F.Farget, D.J.Morrissey, A.M.Amthor, B.Bastin, D.Bazin, B.Blank, L.Caceres, A.Chbihi, B.Fernandez-Dominguez, S.Grevy, O.Kamalou, S.M.Lukyanov, W.Mittig, J.Pereira, L.Perrot, M.-G.Saint-Laurent, H.Savajols, B.M.Sherrill, C.Stodel, J.C.Thomas, A.C.Villari

Fission fragment yields from heavy-ion-induced reactions measured with a fragment separator

NUCLEAR REACTIONS 9Be, 12C(238U, x), E=20, 24 MeV/nucleon; measured Eγ, Iγ, γγ-coin, (heavy fragment)γ-coin. 96Zr, 120Sn; deduced fragments charge distribution, σ vs charge and vs mass; calculated partial σ vs angular momentum for different participating processes, CN formation σ vs projectile energy for E=4-100 MeV/nucleon using LISE++ code, fusion-fission Rh fragment reduced yield vs Rh mass for different beam energies.

doi: 10.1140/epja/i2018-12500-0
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2017BL03      J.Phys.(London) G44, 054003 (2017)

J.Bliss, A.Arcones, F.Montes, J.Pereira

Impact of (α, n) reactions on weak r-process in neutrino-driven winds

NUCLEAR REACTIONS 69Ga, 100Mo(α, n), (α, 2n), E(cm)<24 MeV; calculated yields, abundances using TALYS 1.6 nuclear reaction code. Comparison with available data.

doi: 10.1088/1361-6471/aa63bd
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2017JO06      Phys.Rev. C 95, 044323 (2017), Erratum Phys.Rev. C 96, 059902 (2017)

M.D.Jones, T.Baumann, J.Brett, J.Bullaro, P.A.DeYoung, J.E.Finck, N.Frank, K.Hammerton, J.Hinnefeld, Z.Kohley, A.N.Kuchera, J.Pereira, A.Rabeh, J.K.Smith, A.Spyrou, S.L.Stephenson, K.Stiefel, M.Tuttle-Timm, R.G.T.Zegers, M.Thoennessen

Neutron-unbound excited states of 23N

NUCLEAR REACTIONS 2H(24O, p)23N, E=83.4 MeV/nucleon, [secondary 24O beam from 9Be(48Ca, X), E=140 MeV/nucleon primary reaction at NSCL-MSU accelerator facility]; measured reaction products and identified via ΔE vs. time-of-flight measurement, neutron spectra from the decay of 23N excited states using MONA and LISA arrays of plastic scintillators; analyzed two-body decay energy spectrum for 22N+1n. 23N; deduced levels above S(n), J, π, S(n), S(2n), configurations; calculated levels, J, π using shell-model and several interactions.

doi: 10.1103/PhysRevC.95.044323
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2017KA25      Phys.Lett. B 769, 549 (2017)

A.Kankainen, P.J.Woods, H.Schatz, T.Poxon-Pearson, D.T.Doherty, V.Bader, T.Baugher, D.Bazin, B.A.Brown, J.Browne, A.Estrade, A.Gade, J.Jose, A.Kontos, C.Langer, G.Lotay, Z.Meisel, F.Montes, S.Noji, F.Nunes, G.Perdikakis, J.Pereira, F.Recchia, T.Redpath, R.Stroberg, M.Scott, D.Seweryniak, J.Stevens, D.Weisshaar, K.Wimmer, R.Zegers

Measurement of key resonance states for the 30P(p, γ)31S reaction rate, and the production of intermediate-mass elements in nova explosions

NUCLEAR REACTIONS 2H(30P, n)31S, E=30 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies and relative intensities, σ, negative-parity states, spectroscopic factors, resonance parameters, astrophysical reaction rates. The GRETINA (Gamma-Ray Energy Tracking In-beam Nuclear Array), the National Superconducting Cyclotron Laboratory, Michigan State University.

doi: 10.1016/j.physletb.2017.01.084
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2017MI06      Phys.Lett. B 769, 339 (2017)

K.Miki, R.G.T.Zegers, Sam M.Austin, D.Bazin, B.A.Brown, A.C.Dombos, R.K.Grzywacz, M.N.Harakeh, E.Kwan, S.N.Liddick, S.Lipschutz, E.Litvinova, M.Madurga, M.T.Mustonen, W.J.Ong, S.V.Paulauskas, G.Perdikakis, J.Pereira, W.A.Peters, C.Robin, M.Scott, A.Spyrou, C.Sullivan, R.Titus

Isovector excitations in 100Nb and their decays by neutron emission studied via the 100Mo(t, 3He + n) reaction at 115 MeV/ u

NUCLEAR REACTIONS 100Mo(t, 3He), E=115 MeV/nucleon; measured reaction products; deduced σ(θ, E), Gamow-Teller transition strength. Comparison with the single-particle estimate and spherical pn-(R)QRPA and pn-RQTBA calculations.

doi: 10.1016/j.physletb.2017.04.004
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2017ON01      Phys.Rev. C 95, 055806 (2017)

W.-J.Ong, C.Langer, F.Montes, A.Aprahamian, D.W.Bardayan, D.Bazin, B.A.Brown, J.Browne, H.Crawford, R.Cyburt, E.B.Deleeuw, C.Domingo-Pardo, A.Gade, S.George, P.Hosmer, L.Keek, A.Kontos, I.-Y.Lee, A.Lemasson, E.Lunderberg, Y.Maeda, M.Matos, Z.Meisel, S.Noji, F.M.Nunes, A.Nystrom, G.Perdikakis, J.Pereira, S.J.Quinn, F.Recchia, H.Schatz, M.Scott, K.Siegl, A.Simon, M.Smith, A.Spyrou, J.Stevens, S.R.Stroberg, D.Weisshaar, J.Wheeler, K.Wimmer, R.G.T.Zegers

Low-lying level structure of 56Cu and its implications for the rp process

NUCLEAR REACTIONS 2H(56Ni, 56Cu), E AP 75 MeV/nucleon, [secondary 56Ni beam from 9Be(58Ni, X), E=160 MeV/nucleon primary reaction using A1900 separator at NSCL-MSU facility]; measured ΔE-TOF particle identification for ions, Eγ, Iγ, γγ-, (56Cu ions)γ-coin using GRETINA array and S800 magnetic spectrograph. 56Cu; deduced levels, J, π. Comparison with mirror nucleus 56Co level scheme, and with shell-model calculations 55Ni(p, γ)56Cu, T9=0.1-10; deduced Q value, astrophysical reaction rates as function of temperature, and impact on the r-process around 56Ni.

NUCLEAR STRUCTURE 56Cu; calculated levels, resonance energies, J, π, spectroscopic factors, Γp, Γγ using shell model with the GXPF1A interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.95.055806
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2017PA10      Phys.Rev. C 95, 044606 (2017)

C.Paradela, L.Tassan-Got, J.Benlliure, J.L.Rodriguez-Sanchez, L.Audouin, A.Boudard, E.Casarejos, T.Enqvist, J.E.Ducret, F.Farget, B.Fernandez-Dominguez, M.Fernandez-Ordonez, L.Giot, A.Heinz, V.Henzl, D.Henzlova, A.Kelic-Heil, A.Lafriaskh, S.Leray, P.Napolitani, J.Pereira, D.Perez-Loureiro, M.V.Ricciardi, C.Stephan, K.-H.Schmidt, C.Schmitt, C.Villagrasa, C.Volant, O.Yordanov

Isotopic production cross sections of residual nuclei in the spallation reaction 136Xe (200A MeV) + p

NUCLEAR REACTIONS 1H(136Xe, X)115Cd/116Cd/115In/116In/117In/118In/119In/120In/115Sn/116Sn/117Sn/118Sn/119Sn/120Sn/121Sn/122Sn/123Sn/115Sb/116Sb/117Sb/118Sb/119Sb/120Sb/121Sb/122Sb/123Sb/124Sb/125Sb/126Sb/127Sb/128Sb/117Te/118Te/119Te/120Te/121Te/122Te/123Te/124Te/125Te/126Te/127Te/128Te/129Te/130Te/131Te/132Te/119I/120I/121I/122I/123I/124I/125I/126I/127I/128I/129I/130I/131I/132I/133I/134I/135I/120Xe/121Xe/122Xe/123Xe/124Xe/125Xe/126Xe/127Xe/128Xe/129Xe/130Xe/131Xe/132Xe/133Xe/134Xe/135Xe/121Cs/122Cs/123Cs/124Cs/125Cs/126Cs/127Cs/128Cs/129Cs/130Cs/131Cs/132Cs/133Cs/134Cs/135Cs/136Cs, E=200 MeV/nucleon; measured charge distribution, energy loss and isotopic σ(A, Z) and isobaric σ(A) of the fragments using the FRS separator and multisampling ionization chambers (MUSICs) at GSI; deduced correlation plot between atomic number (Z) and mass-over-charge ratio (A/Z), identification plot, correlation between the mass identification in the two FRS sections, momentum distribution of the 125Xe. Comparison with theoretical predictions using INCL4.6 and ISABEL codes coupled to the deexcitation code ABLA07.

doi: 10.1103/PhysRevC.95.044606
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2017PE09      Phys.Rev. C 96, 014306 (2017)

D.Perez-Loureiro, C.Wrede, M.B.Bennett, S.N.Liddick, A.Bowe, B.A.Brown, A.A.Chen, K.A.Chipps, N.Cooper, E.McNeice, F.Naqvi, R.Ortez, S.D.Pain, J.Pereira, C.Prokop, S.J.Quinn, J.Sakstrup, M.Santia, S.B.Schwartz, S.Shanab, A.Simon, A.Spyrou, E.Thiagalingam

Confirmation of the isomeric state in 26P

NUCLEAR REACTIONS 9Be(36Ar, 26P), E=150 MeV/nucleon; measured 26P recoils, Eγ, Iγ, (26P)γ-coin, half-life of the isomer by (recoils)γ(t) using A1900 fragment separator, Radio-Frequency Fragment Separator and SeGA array at NSCL-MSU facility. 26P; deduced level, isomer, S(p). Comparison with previous experimental data.

doi: 10.1103/PhysRevC.96.014306
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2016CI01      Eur.Phys.J. A 52, 89 (2016)

A.A.Ciemny, W.Dominik, T.Ginter, R.Grzywacz, Z.Janas, M.Kuich, C.Mazzocchi, K.Miernik, M.Pfutzner, M.Pomorski, D.Bazin, T.Baumann, A.Bezbakh, B.P.Crider, M.Cwiok, S.Go, G.Kaminski, K.Kolos, A.Korgul, E.Kwan, S.N.Liddick, S.V.Paulauskas, J.Pereira, K.P.Rykaczewski, C.Sumithrarachchi, Y.Xiao

First measurement of 60Ge β-decay

RADIOACTIVITY 60Ge(β+)[from 78Kr+9Be fragmentation at 150 MeV/nucleon]; measured reaction products using OTPC (Optical Time Projection Chamber) plus GEM (Gas Electron Multiplier) for each βp decay event; deduced T1/2. Compared with Moeller measurement and with calculations using three different mass formulae.

doi: 10.1140/epja/i2016-16089-x
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2016KA05      Eur.Phys.J. A 52, 6 (2016)

A.Kankainen, P.J.Woods, F.Nunes, C.Langer, H.Schatz, V.Bader, T.Baugher, D.Bazin, B.A.Brown, J.Browne, D.T.Doherty, A.Estrade, A.Gade, A.Kontos, G.Lotay, Z.Meisel, F.Montes, S.Noji, G.Perdikakis, J.Pereira, F.Recchia, T.Redpath, R.Stroberg, M.Scott, D.Seweryniak, J.Stevens, D.Weisshaar, K.Wimmer, R.Zegers

Angle-integrated measurements of the 26Al (d, n) 27Si reaction cross section: a probe of spectroscopic factors and astrophysical resonance strengths

NUCLEAR REACTIONS 2H(26Al, n), E=30 MeV/nucleon; measured 511 keV γ-ray using GRETINA (Gamma-Ray Energy Tracking In-beam Nuclear Array), Si recoils, (Si)γ-coin; deduced Doppler-reconstructed γ-ray spectrum in coincidence with Si, σ, resonances, spectroscopic factors to discrete states; calculated σ using shell model.

doi: 10.1140/epja/i2016-16006-5
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2016ME07      Phys.Rev. C 93, 035805 (2016)

Z.Meisel, S.George, S.Ahn, D.Bazin, B.A.Brown, J.Browne, J.F.Carpino, H.Chung, R.H.Cyburt, A.Estrade, M.Famiano, A.Gade, C.Langer, M.Matos, W.Mittig, F.Montes, D.J.Morrissey, J.Pereira, H.Schatz, J.Schatz, M.Scott, D.Shapira, K.Sieja, K.Smith, J.Stevens, W.Tan, O.Tarasov, S.Towers, K.Wimmer, J.R.Winkelbauer, J.Yurkon, R.G.T.Zegers

Time-of-flight mass measurements of neutron-rich chromium isotopes up to N=40 and implications for the accreted neutron star crust

ATOMIC MASSES 59,60,61,62,63,64Cr; measured mass excesses by time-of-flight (TOF) method using 9Be(82Se, X), E=140 MeV/nucleon for production of Si to Zn isotopes and A1900 fragment separator and S800 spectrograph for fragment separation and analysis at NSCL-MSU. TOF versus mass contour plot obtained for Ar (A=44-49), K (A=47-52), Ca (A=49-55), Sc (A=52-58), Ti (A=54-60), V (A=57-63), Cr (A=59-66), Mn (A=62-70) and Fe (A=64-71) isotopes. Analyzed S(2n) trends and compared to AME-2012. Comparison with state-of-the-art shell-model calculations using modified Lenzi-Nowacki-Poves-Sieja interaction in the fp shell, and with AME-2012 data. Mass of 64Cr used in accreted neutron star crust network calculations, and deduced reduction in strength depth of electron-capture heating from A=64 isobaric chain.

NUCLEAR REACTIONS 9Be(82Se, X), E=140 MeV/nucleon; measured time-of-flight, energy loss, fragment yields of 150 isotopes from Si to Zn using A1900 fragment separator and S800 spectrograph at NSCL-MSU.

doi: 10.1103/PhysRevC.93.035805
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2016PE04      Phys.Rev. C 93, 034611 (2016)

J.Pereira, F.Montes

Theoretical uncertainty of (α, n) reactions relevant for the nucleosynthesis of light r-process nuclei in neutrino-driven winds

NUCLEAR REACTIONS 21Ne, 25Mg, 41K, 74Ga, 82,83,84,85,86Se(α, n), T9=1-10; calculated reaction rates using TALYS code based on Hauser-Feshbach approach for several different models, options, and input parameters; analyzed ratios of experimental and theoretical values; deduced theoretical uncertainties. Detailed discussion of nuclear input parameters such as level densities from different models, mass models, preequilibrium models, level structure such as energy, spin, and parity of the nuclei, α-particle potentials. Relevance to nucleosynthesis of light r-process nuclei in neutrino-driven winds following core-collapse supernova explosions.

doi: 10.1103/PhysRevC.93.034611
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2016PE10      Phys.Rev. C 93, 064320 (2016)

D.Perez-Loureiro, C.Wrede, M.B.Bennett, S.N.Liddick, A.Bowe, B.A.Brown, A.A.Chen, K.A.Chipps, N.Cooper, D.Irvine, E.McNeice, F.Montes, F.Naqvi, R.Ortez, S.D.Pain, J.Pereira, C.J.Prokop, J.Quaglia, S.J.Quinn, J.Sakstrup, M.Santia, S.B.Schwartz, S.Shanab, A.Simon, A.Spyrou, E.Thiagalingam

β-delayed γ decay of 26P: Possible evidence of a proton halo

RADIOACTIVITY 26P, 24Al(β+), (EC)[from 9Be(36Ar, X), E=150 MeV/nucleon using A1900 fragment separator and the Radio-Frequency Fragment Separator (RFFS) at NSCL-MSU]; measured Eγ, Iγ, 26P ions, Eβ, Iβ, γγ-, βγγ-coin using GeDSSD detector for ions and β particles and SeGA array for γ rays. 26Si; deduced levels, J, π, Iβ feedings, B(GT) strengths, logft, mirror asymmetry, proton halo. Comparisons with β decay of 26Na mirror nucleus, previous experimental data for 26Si levels, and USDB shell-model calculations. 24Mg; observed γ rays. 25Al(p, γ)26Si, T9=0.01-0.5; calculated astrophysical reaction rates.

doi: 10.1103/PhysRevC.93.064320
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2015AL19      Phys.Rev. C 92, 024607 (2015)

J.Alcantara-Nunez, J.Benlliure, C.Paradela, C.Perez-Loureiro, J.L.Rodriguez-Sanchez, L.Audouin, A.Boudard, E.Casarejos, T.Enqvist, F.Farget, M.Fernandez-Ordonez, A.Heinz, V.Henzl, D.Henzlova, A.Kelic-Heil, A.Lafriaskh, S.Leray, P.Napolitani, J.Pereira, M.V.Ricciardi, C.Stephan, K.-H.Schmidt, C.Schmitt, L.Tassan-Got, C.Villagrasa, C.Volant, O.Yordanov

Isotopic yields of spallation residues produced in 136Xe-induced reactions on deuterium at 500 A MeV

NUCLEAR REACTIONS 2H(136Xe, X)37Ar/38Ar/39Ar/40Ar/41Ar/42Ar/38K/39K/40K/41K/42K/43K/44K/45K/40Ca/41Ca/42Ca/43Ca/44Ca/45Ca/46Ca/47Ca/42Sc/43Sc/44Sc/45Sc/46Sc/47Sc/48Sc/49Sc/50Sc/44Ti/45Ti/46Ti/47Ti/48Ti/49Ti/50Ti/51Ti/52Ti/46V/47V/48V/49V/50V/51V/52V/53V/54V/55V/56V/48Cr/49Cr/50Cr/51Cr/52Cr/53Cr/54Cr/55Cr/56Cr/57Cr/58Cr/50Mn/51Mn/52Mn/53Mn/54Mn/55Mn/56Mn/57Mn/58Mn/59Mn/60Mn/61Mn/52Fe/53Fe/54Fe/55Fe/56Fe/57Fe/58Fe/59Fe/60Fe/61Fe/62Fe/63Fe/54Co/55Co/56Co/57Co/58Co/59Co/60Co/61Co/62Co/63Co/64Co/65Co/56Ni/57Ni/58Ni/59Ni/60Ni/61Ni/62Ni/63Ni/64Ni/65Ni/66Ni/67Ni/68Ni/59Cu/60Cu/61Cu/62Cu/63Cu/64Cu/65Cu/66Cu/67Cu/68Cu/69Cu/70Cu/61Zn/62Zn/63Zn/64Zn/65Zn/66Zn/67Zn/68Zn/69Zn/70Zn/71Zn/72Zn/73Zn/63Ga/64Ga/65Ga/66Ga/67Ga/68Ga/69Ga/70Ga/71Ga/72Ga/73Ga/74Ga/75Ga/65Ge/66Ge/67Ge/68Ge/69Ge/70Ge/71Ge/72Ge/73Ge/74Ge/75Ge/76Ge/77Ge/78Ge/67As/68As/69As/70As/71As/72As/73As/74As/75As/76As/77As/78As/79As/80As/69Se/70Se/71Se/72Se/73Se/74Se/75Se/76Se/77Se/78Se/79Se/80Se/81Se/82Se/83Se/71Br/72Br/73Br/74Br/75Br/76Br/77Br/78Br/79Br/80Br/81Br/82Br/83Br/84Br/85Br/86Br/73Kr/74Kr/75Kr/76Kr/77Kr/78Kr/79Kr/80Kr/81Kr/82Kr/83Kr/84Kr/85Kr/86Kr/87Kr/88Kr/76Rb/77Rb/78Rb/79Rb/80Rb/81Rb/82Rb/83Rb/84Rb/85Rb/86Rb/87Rb/88Rb/89Rb/90Rb/78Sr/79Sr/80Sr/81Sr/82Sr/83Sr/84Sr/85Sr/86Sr/87Sr/88Sr/89Sr/90Sr/91Sr/92Sr/93Sr/94Sr, E=500 MeV/nucleon; measured yields and cross sections of spallation reaction residue products using the FRS magnetic spectrometer and multisampling ionization chambers at GSI facility. 2H(136Xe, X)79Y/80Y/81Y/82Y/83Y/84Y/85Y/86Y/87Y/88Y/89Y/90Y/91Y/92Y/93Y/94Y/95Y/96Y/97Y/81Zr/82Zr/83Zr/84Zr/85Zr/86Zr/87Zr/88Zr/89Zr/90Zr/91Zr/92Zr/93Zr/94Zr/95Zr/96Zr/97Zr/98Zr/99Zr/83Nb/84Nb/85Nb/86Nb/87Nb/88Nb/89Nb/90Nb/91Nb/92Nb/93Nb/94Nb/95Nb/96Nb/97Nb/98Nb/99Nb/100Nb/101Nb/102Nb/85Mo/86Mo/87Mo/88Mo/89Mo/90Mo/91Mo/92Mo/93Mo/94Mo/95Mo/96Mo/97Mo/98Mo/99Mo/100Mo/101Mo/102Mo/102Mo/104Mo/105Mo/88Tc/89Tc/90Tc/91Tc/92Tc/93Tc/94Tc/95Tc/96Tc/97Tc/98Tc/99Tc/100Tc/101Tc/102Tc/103Tc/104Tc/105Tc/106Tc/107Tc/108Tc/90Ru/91Ru/92Ru/93Ru/94Ru/95Ru/96Ru/97Ru/98Ru/99Ru/100Ru/101Ru/102Ru/103Ru/104Ru/105Ru/106Ru/107Ru/108Ru/109Ru/110Ru/111Ru/112Ru/92Rh/93Rh/94Rh/95Rh/96Rh/97Rh/98Rh/99Rh/100Rh/101Rh/102Rh/103Rh/104Rh/105Rh/106Rh/107Rh/108Rh/109Rh/110Rh/111Rh/112Rh/113Rh/114Rh/115Rh/116Rh/94Pd/95Pd/96Pd/97Pd/98Pd/99Pd/100Pd/101Pd/102Pd/103Pd/104Pd/105Pd/106Pd/107Pd/108Pd/109Pd/110Pd/111Pd/112Pd/113Pd/114Pd/115Pd/116Pd/117Pd/118Pd/119Pd/120Pd/98Ag/99Ag/100Ag/101Ag/102Ag/103Ag/104Ag/105Ag/106Ag/107Ag/108Ag/109Ag/110Ag/111Ag/112Ag/113Ag/114Ag/115Ag/116Ag/117Ag/118Ag/119Ag/120Ag/121Ag/122Ag/123Ag/100Cd/101Cd/102Cd/103Cd/104Cd/105Cd/106Cd/107Cd/108Cd/109Cd/110Cd/111Cd/112Cd/113Cd/114Cd/115Cd/116Cd/117Cd/118Cd/119Cd/120Cd/121Cd/122Cd/123Cd/124Cd/125Cd/126Cd, E=500 MeV/nucleon; measured yields and cross sections of spallation reaction residue products using the FRS magnetic spectrometer and multisampling ionization chambers at GSI facility. 2H(136Xe, X)102In/103In/104In/105In/106In/107In/108In/109In/110In/111In/112In/113In/114In/115In/116In/117In/118In/119In/120In/121In/122In/123In/124In/125In/126In/127In/128In/129In/105Sn/106Sn/107Sn/108Sn/109Sn/110Sn/111Sn/112Sn/113Sn/114Sn/115Sn/116Sn/117Sn/118Sn/119Sn/120Sn/121Sn/122Sn/123Sn/124Sn/125Sn/126Sn/127Sn/128Sn/129Sn/130Sn/131Sn/132Sn/107Sb/108Sb/109Sb/110Sb/111Sb/112Sb/113Sb/114Sb/115Sb/116Sb/117Sb/118Sb/119Sb/120Sb/121Sb/122Sb/123Sb/124Sb/125Sb/126Sb/127Sb/128Sb/129Sb/130Sb/131Sb/132Sb/133Sb/134Sb/110Te/111Te/112Te/113Te/114Te/115Te/116Te/117Te/118Te/119Te/120Te/121Te/122Te/123Te/124Te/125Te/126Te/127Te/128Te/129Te/130Te/131Te/132Te/133Te/134Te/135Te/112I/113I/114I/115I/116I/117I/118I/119I/120I/121I/122I/123I/124I/125I/126I/127I/128I/129I/130I/131I/132I/133I/134I/135I/136I/116Xe/117Xe/118Xe/119Xe/120Xe/121Xe/122Xe/123Xe/124Xe/125Xe/126Xe/127Xe/128Xe/129Xe/130Xe/131Xe/132Xe/133Xe/134Xe/135Xe/119Cs/120Cs/121Cs/122Cs/123Cs/124Cs/125Cs/126Cs/127Cs/128Cs/129Cs/130Cs/131Cs/132Cs/133Cs/134Cs/135Cs/136Cs/123Ba/124Ba/125Ba/126Ba/127Ba/128Ba/129Ba/130Ba/131Ba/132Ba/133Ba/134Ba/135Ba, E=500 MeV/nucleon; measured yields and cross sections of spallation reaction residue products using the FRS magnetic spectrometer and multisampling ionization chambers at GSI facility. Benchmarked reference model calculations describing spallation reactions. Comparison with the measured production yields in 1H(136Xe, X), E=500, 1000 MeV/nucleon.

doi: 10.1103/PhysRevC.92.024607
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2015CI06      Phys.Rev. C 92, 014622 (2015)

A.A.Ciemny, W.Dominik, T.Ginter, R.Grzywacz, Z.Janas, M.Kuich, C.Mazzocchi, M.Pfutzner, M.Pomorski, F.Zarzynski, D.Bazin, T.Baumann, A.Bezbakh, B.P.Crider, M.Cwiok, S.Go, G.Kaminski, K.Kolos, A.Korgul, E.Kwan, S.Liddick, K.Miernik, S.V.Paulauskas, J.Pereira, K.Rykaczewski, C.Sumithrarachchi, Y.Xiao

First observation of 59Ge

NUCLEAR REACTIONS 9Be(78Kr, X)59Ge/60Ge/61Ge/62Ge, E=150 MeV/nucleon; measured production cross sections using A1900 separator and Optical Time Projection Chamber (OTPC) at NSCL-MSU facility; deduced new 59Ge isotope. Comparison with EPAX3 theoretical calculations. Relevance to 2p radioactivity.

doi: 10.1103/PhysRevC.92.014622
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2015JO14      Phys.Rev. C 92, 051306 (2015)

M.D.Jones, N.Frank, T.Baumann, J.Brett, J.Bullaro, P.A.DeYoung, J.E.Finck, K.Hammerton, J.Hinnefeld, Z.Kohley, A.N.Kuchera, J.Pereira, A.Rabeh, W.F.Rogers, J.K.Smith, A.Spyrou, S.L.Stephenson, K.Stiefel, M.Tuttle-Timm, R.G.T.Zegers, M.Thoennessen

Two-neutron sequential decay of 24O

NUCLEAR REACTIONS 2H(24O, 2n22O), E=83.4 MeV/nucleon, [24O secondary beam from 9Be(48Ca, X), E=140 MeV/nucleon primary reaction at NSCL-MSU]; measured charged-particle spectra using position- and energy-sensitive detectors, E(n) and I(n) using MONA-LISA array, three-body decay energy, angular correlations. 24O; deduced level, resonance, l-transfer, width, evidence for two-neutron sequential decay from resonant state. 23O; deduced intermediate level, J, π through one-neutron decay of 24O resonant state. Comparison with di-neutron and phase-space model calculations for the three-body breakup.

doi: 10.1103/PhysRevC.92.051306
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2015ME01      Phys.Rev.Lett. 114, 022501 (2015)

Z.Meisel, S.George, S.Ahn, J.Browne, D.Bazin, B.A.Brown, J.F.Carpino, H.Chung, R.H.Cyburt, A.Estrade, M.Famiano, A.Gade, C.Langer, M.Matos, W.Mittig, F.Montes, D.J.Morrissey, J.Pereira, H.Schatz, J.Schatz, M.Scott, D.Shapira, K.Smith, J.Stevens, W.Tan, O.Tarasov, S.Towers, K.Wimmer, J.R.Winkelbauer, J.Yurkon, R.G.T.Zegers

Mass Measurements Demonstrate a Strong N=28 Shell Gap in Argon

ATOMIC MASSES 48,49Ar; measured time of flight; deduced masses, N=28 closed shell, problems of shell model calculations.

doi: 10.1103/PhysRevLett.114.022501
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2015ME08      Phys.Rev.Lett. 115, 162501 (2015)

Z.Meisel, S.George, S.Ahn, D.Bazin, B.A.Brown, J.Browne, J.F.Carpino, H.Chung, A.L.Cole, R.H.Cyburt, A.Estrade, M.Famiano, A.Gade, C.Langer, M.Matos, W.Mittig, F.Montes, D.J.Morrissey, J.Pereira, H.Schatz, J.Schatz, M.Scott, D.Shapira, K.Smith, J.Stevens, W.Tan, O.Tarasov, S.Towers, K.Wimmer, J.R.Winkelbauer, J.Yurkon, R.G.T.Zegers

Mass Measurement of 56Sc Reveals a Small A=56 Odd-Even Mass Staggering, Implying a Cooler Accreted Neutron Star Crust

ATOMIC MASSES 52,53,54,55,56,57Sc; measured rigidity-corrected time-of-flight distributions; deduced atomic mass excesses. Comparison with AME 2012, theoretical models.

doi: 10.1103/PhysRevLett.115.162501
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2015NO04      Phys.Rev. C 92, 024312 (2015)

S.Noji, R.G.T.Zegers, SamM.Austin, T.Baugher, D.Bazin, B.A.Brown, C.M.Campbell, A.L.Cole, H.J.Doster, A.Gade, C.J.Guess, S.Gupta, G.W.Hitt, C.Langer, S.Lipschutz, E.Lunderberg, R.Meharchand, Z.Meisel, G.Perdikakis, J.Pereira, F.Recchia, H.Schatz, M.Scott, S.R.Stroberg, C.Sullivan, L.Valdez, C.Walz, D.Weisshaar, S.J.Williams, K.Wimmer

Gamow-Teller transitions to 45Ca via the 45Sc (t, 3He+γ) reaction at 115 MeV/u and its application to stellar electron-capture rates

NUCLEAR REACTIONS 45Sc(t, 3He), E=115 MeV/nucleon, [triton beam from 9Be(16O, X), E=150 MeV/nucleon reaction]; measured 3He spectra, double-differential σ(θ), Eγ, Iγ, (particle)γ-coin using S800 spectrometer, cathode-readout drift chambers (CRDCs) and Gretina array at NSCL-MSU Coupled-Cyclotron facility. 45Ca; deduced levels, J, π, B(GT) strength functions, electron capture rates on 45Ca as function of stellar temperatures T9=8.5-10.5, poor agreement with shell-model calculations in the pf space and using GXPF1A, KB3G, and FPD6 interactions. Comparison of B(GT) with that from 45Ca g.s. to 45Sc g.s. β transition.

doi: 10.1103/PhysRevC.92.024312
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2179. Data from this article have been entered in the XUNDL database. For more information, click here.


2015QU01      Phys.Rev. C 92, 045805 (2015)

S.J.Quinn, A.Spyrou, A.Simon, A.Battaglia, M.Bowers, B.Bucher, C.Casarella, M.Couder, P.A.DeYoung, A.C.Dombos, J.Gorres, A.Kontos, Q.Li, A.Long, M.Moran, N.Paul, J.Pereira, D.Robertson, K.Smith, M.K.Smith, E.Stech, R.Talwar, W.P.Tan, M.Wiescher

(α, γ) cross section measurements in the region of light p nuclei

NUCLEAR REACTIONS 74Ge, 90,92Zr(α, γ), E=9.5-12 MeV; measured Eγ, Iγ, σ(E) using the SuN detector and gamma-summing technique at Notre Dame Tandem Van de Graaff accelerator; deduced stellar reaction rates for 90Zr(α, γ) reaction. Nucleosynthesis of light p-process nuclei. Comparison with statistical model calculations using TALYS and NON-SMOKER codes.

doi: 10.1103/PhysRevC.92.045805
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2196.


2015SC16      Phys.Rev. C 92, 031302 (2015)

S.B.Schwartz, C.Wrede, M.B.Bennett, S.N.Liddick, D.Perez-Loureiro, A.Bowe, A.A.Chen, K.A.Chipps, N.Cooper, D.Irvine, E.McNeice, F.Montes, F.Naqvi, R.Ortez, S.D.Pain, J.Pereira, C.Prokop, J.Quaglia, S.J.Quinn, J.Sakstrup, M.Santia, S.Shanab, A.Simon, A.Spyrou, E.Thiagalingam

Observation of Doppler broadening in β-delayed proton-γ decay

RADIOACTIVITY 26P(β+p)[from 9Be(36Ar, X), E=150 MeV/nucleon and A1900 fragment separator at NSCL-MSU]; measured Eγ, first observation of Doppler-broadened γ rays in β-delayed proton-γ decay, Iγ, γγ-coin, Eβ, βγ-correlated spectra using Si detectors for β and implanted nuclei, SeGA array for γ rays 25Al; deduced levels, β+p feedings. 26Si; deduced energies of proton emitting states from the kinematic analysis of Doppler-broadened γ rays. Comparison with previous experimental data. 24Mg, 26Al, 26Si; observed γ rays.

doi: 10.1103/PhysRevC.92.031302
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2015SI13      Phys.Rev. C 92, 025806 (2015)

A.Simon, M.Beard, A.Spyrou, S.J.Quinn, B.Bucher, M.Couder, P.A.DeYoung, A.C.Dombos, J.Gorres, A.Kontos, A.Long, M.T.Moran, N.Paul, J.Pereira, D.Robertson, K.Smith, E.Stech, R.Talwar, W.P.Tan, M.Wiescher

Systematic study of (α, γ) reactions for stable nickel isotopes

NUCLEAR REACTIONS 58,60,61,62,64Ni(α, γ), E=5-9 MeV; measured Eγ, Iγ, σ(E) using γ-summing detector SuN at Notre Dame tandem (FN) Pelletron accelerator facility; deduced astrophysical reaction rates. Comparison with available experimental data, and with Hauser-Feshbach calculations using TALYS 1.6 code with different combinations of α-optical potentials. nuclear level densities, and E1 γ-ray strength functions. Comparisons with results in NON-SMOKER and BRUSLIB databases.

doi: 10.1103/PhysRevC.92.025806
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2014DE41      Phys.Lett. B 738, 453 (2014)

M.Del Santo, Z.Meisel, D.Bazin, A.Becerril, B.A.Brown, H.Crawford, R.Cyburt, S.George, G.F.Grinyer, G.Lorusso, P.F.Mantica, F.Montes, J.Pereira, H.Schatz, K.Smith, M.Wiescher

β-delayed proton emission of 69Kr and the 68Se rp-process waiting point

RADIOACTIVITY 69Kr(β+p) [from Be(78Kr, X)69Kr, E not given]; measured reaction products, Ep, Ip, Eβ, Iβ, Eγ, Iγ. 69Br; deduced T1/2, proton separation energy, proton emission decay scheme, γ-ray energies. Comparison with shell model calculations.

doi: 10.1016/j.physletb.2014.10.023
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2014KU02      Phys.Rev. C 89, 024616 (2014)

T.Kurtukian-Nieto, J.Benlliure, K.-H.Schmidt, L.Audouin, F.Becker, B.Blank, E.Casarejos, F.Farget, M.Fernandez-Ordonez, J.Giovinazzo, D.Henzlova, B.Jurado, J.Pereira, O.Yordanov

Production cross sections of heavy neutron-rich nuclei approaching the nucleosynthesis r-process path around A=195

NUCLEAR REACTIONS 9Be(208Pb, X), E=1 GeV/nucleon; measured reaction products, production σ for 190 heavy neutron-rich nuclei, including 26 nuclides produced for the first time, using FRS, SEETRAM, MUSIC1 and MUSIC2 at UNILAC-SIS facility at GSI. In-flight fragmentation. 181,182Yb, 185,186Lu, 189,190Hf, 191,192,193Ta, 193,194,195W, 195,196,197,198Re, 198,199,200,201Os, 200,201,202,203Ir, 203,204Pt; measured production σ for new nuclides. Z=70, A=170-182; Z=71, A=170-186; Z=72, A=174, 175, 177-190; Z=73, A=176-193; Z=74, A=178-195; Z=75, A=182-184, 186-198; Z=76, A=183-201; Z=77, A=186-203; Z=78, A=188-190, 192-204; Z=79, A=191-205; Z=80, A=197-202, 204-206; Z=81, A=200-204, 206, 207; Z=82, A=204-207; Z=83, A=205-208; measured production σ. Comparison with EPAX, COFRA, and ABRABLA nuclear fragmentation cross-section models. Relevance to r-process waiting point nuclei at A=195.

doi: 10.1103/PhysRevC.89.024616
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1281.


2014KU23      Eur.Phys.J. A 50, 135 (2014)

T.Kurtukian-Nieto, J.Benlliure, K.-H.Schmidt, L.Audouin, F.Becker, B.Blank, I.N.Borzov, E.Casarejos, F.Farget, M.Fernandez-Ordonez, J.Giovinazzo, D.Henzlova, B.Jurado, K.Langanke, G.Martinez-Pinedo, J.Pereira, O.Yordanov

Beta-decay half-lives of new neutron-rich isotopes of Re, Os and Ir approaching the r-process path near N = 126

doi: 10.1140/epja/i2014-14135-5
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2014LA16      Phys.Rev.Lett. 113, 032502 (2014)

C.Langer, F.Montes, A.Aprahamian, D.W.Bardayan, D.Bazin, B.A.Brown, J.Browne, H.Crawford, R.H.Cyburt, C.Domingo-Pardo, A.Gade, S.George, P.Hosmer, L.Keek, A.Kontos, I-Y.Lee, A.Lemasson, E.Lunderberg, Y.Maeda, M.Matos, Z.Meisel, S.Noji, F.M.Nunes, A.Nystrom, G.Perdikakis, J.Pereira, S.J.Quinn, F.Recchia, H.Schatz, M.Scott, K.Siegl, A.Simon, M.Smith, A.Spyrou, J.Stevens, S.R.Stroberg, D.Weisshaar, J.Wheeler, K.Wimmer, R.G.T.Zegers

Determining the rp-Process Flow through 56Ni: Resonances in 57Cu(p, γ)58Zn identified with GRETINA

NUCLEAR REACTIONS 2H(57Cu, n), E=75 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced resonance energies, J, π, reaction rates. Shell model calculations, GXPF1A interaction.

doi: 10.1103/PhysRevLett.113.032502
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2014NO05      Phys.Rev.Lett. 112, 252501 (2014)

S.Noji, R.G.T.Zegers, S.M.Austin, T.Baugher, D.Bazin, B.A.Brown, C.M.Campbell, A.L.Cole, H.J.Doster, A.Gade, C.J.Guess, S.Gupta, G.W.Hitt, C.Langer, S.Lipschutz, E.Lunderberg, R.Meharchand, Z.Meisel, G.Perdikakis, J.Pereira, F.Recchia, H.Schatz, M.Scott, S.R.Stroberg, C.Sullivan, L.Valdez, C.Walz, D.Weisshaar, S.Williams, K.Wimmer

β+ Gamow-Teller Transition Strengths from 46Ti and Stellar Electron-Capture Rates

RADIOACTIVITY 46Ti(β+), (EC) [from 46Ti(t, 3He), E=115 MeV/nucleon]; measured reaction and decay products, Eγ, Iγ; deduced σ(θ, E), Gamow-Teller transition strength, energy levels, J, π, electron capture decay rates. Comparison with shell model calculations using GXPF1A, KB3G, FPD6 interactions, QRPA calculations.

doi: 10.1103/PhysRevLett.112.252501
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2120. Data from this article have been entered in the XUNDL database. For more information, click here.


2014PO05      Phys.Rev. C 90, 014311 (2014)

M.Pomorski, M.Pfutzner, W.Dominik, R.Grzywacz, A.Stolz, T.Baumann, J.S.Berryman, H.Czyrkowski, R.Dabrowski, A.Fijalkowska, T.Ginter, J.Johnson, G.Kaminski, N.Larson, S.N.Liddick, M.Madurga, C.Mazzocchi, S.Mianowski, K.Miernik, D.Miller, S.Paulauskas, J.Pereira, K.P.Rykaczewski, S.Suchyta

Proton spectroscopy of 48Ni, 46Fe, and 44Cr

RADIOACTIVITY 48Ni(2p); 44Cr, 46Fe(β+p); 46Fe(β+2p); [44Cr, 46Fe, 48Ni activities from Ni(58Ni, X), E=160 MeV/nucleon]; measured Ep, Ip, half-lives of ground states of 44Cr, 46Fe, 48Ni, proton branching ratios using an optical time projection chamber (OPTC). Reconstruction of the four 2p-decay events from decay of 48Ni; deduced Q(2p). Comparison previous experimental results.

NUCLEAR REACTIONS Ni(58Ni, X)44Cr/46Fe/48Ni, E=160 MeV/nucleon; measured fragment spectra, time-of-flight, energy loss and production σ using A1900 separator and standard acquisition system at NSCL-MSU facility. LISE++ analysis. Comparison with EPAX-3 and EPAX-2.1 parametrizations.

doi: 10.1103/PhysRevC.90.014311
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2133. Data from this article have been entered in the XUNDL database. For more information, click here.


2014QU01      Phys.Rev. C 89, 054611 (2014)

S.J.Quinn, A.Spyrou, E.Bravo, T.Rauscher, A.Simon, A.Battaglia, M.Bowers, B.Bucher, C.Casarella, M.Couder, P.A.DeYoung, A.C.Dombos, J.Gorres, A.Kontos, Q.Li, A.Long, M.Moran, N.Paul, J.Pereira, D.Robertson, K.Smith, M.K.Smith, E.Stech, R.Talwar, W.P.Tan, M.Wiescher

Measurement of the 58Ni(α, γ)62Zn reaction and its astrophysical impact

NUCLEAR REACTIONS 58Ni(α, γ)62Zn, E=5.5-9.5 MeV; measured Eγ, Iγ, σ(E) using Summing NaI(Tl) (SuN) detector at NSL-Notre Dame facility; deduced astrophysical reaction rates. Comparison with predictions from statistical Hauser-Feshbach model using SMARAGD code. Discussed Astrophysical implications and elemental abundances.

doi: 10.1103/PhysRevC.89.054611
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2116.


2014QU04      Nucl.Instrum.Methods Phys.Res. A 757, 62 (2014)

S.J.Quinn, A.Spyrou, A.Simon, A.Battaglia, M.Bowers, B.Bucher, C.Casarella, M.Couder, P.A.Deyoung, A.C.Dombos, J.P.Greene, J.Gorres, A.Kontos, Q.Li, A.Long, M.Moran, N.Paul, J.Pereira, D.Robertson, K.Smith, M.K.Smith, E.Stech, R.Talwar, W.P.Tan, M.Wiescher

First application of the technique in inverse kinematics

NUCLEAR REACTIONS 1H(27Al, γ), 1H(58Ni, γ), 27Al(p, γ), 58Ni(p, γ), E=956 keV-1.5 GeV; measured products, Eγ, Iγ; deduced resonance parameters. Data were imported from EXFOR entry C2123.

doi: 10.1016/j.nima.2014.05.020
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2014SA18      Phys.Rev. C 89, 034311 (2014)

P.Sarriguren, A.Algora, J.Pereira

Gamow-Teller response in deformed even and odd neutron-rich Zr and Mo isotopes

RADIOACTIVITY 100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116Zr, 104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120Mo(β-); calculated Q(β), Gamow-Teller strength (B(GT)) distributions, half-lives, β-delayed neutron-emission probability Pn. Self-consistent deformed SLy4 Skyrme Hartree-Fock calculations with pairing and Quasi-particle random-phase approximation (QRPA) correlations. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.034311
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2014SU07      Phys.Rev. C 89, 034317 (2014)

S.Suchyta, S.N.Liddick, C.J.Chiara, W.B.Walters, M.P.Carpenter, H.L.Crawford, G.F.Grinyer, G.Gurdal, A.Klose, E.A.McCutchan, J.Pereira, S.Zhu

β decay of 61, 63V and low-energy level schemes of 61, 63Cr

RADIOACTIVITY 61,63V(β-), (β-n)[from 9Be(76Ge, X), E=130 MeV/nucleon]; measured Eγ, Iγ, γγ-, (fragment)γ-coin, I(β-), half-lives of 61,63V ground states using A1900 fragment separator, Beta Counting System (BCS) and Segmented Ge Array (SeGA) at NSCL-MSU facility. 61,63Cr; deduced levels, J, π, %β-n, internal-conversion coefficient, multipolarity, configurations. Comparison with shell-model calculations.

NUCLEAR STRUCTURE 55,57,59,61Cr; calculated levels, J, π, configuration amplitudes using shell-model with GXPF1A and KB3G interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.034317
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2014SU11      Phys.Rev. C 89, 067303 (2014)

S.Suchyta, S.N.Liddick, C.J.Chiara, W.B.Walters, M.P.Carpenter, H.L.Crawford, G.F.Grinyer, G.Gurdal, A.Klose, E.A.McCutchan, J.Pereira, S.Zhu

β and isomeric decay of 64V

RADIOACTIVITY 64V(β-)[from 9Be(76Ge, X), E=130 MeV/nucleon]; measured Eγ, βγ-, (64V)γ-coin, half-life of 64V g.s. using A1900 fragment separator and SeGA array at NSCL-MSU facility. 64Cr; deduced energy of first 2+ level. Systematics of first 2+ and 4+ states in A=54-64 even-even Cr nuclei.

NUCLEAR REACTIONS 9Be(76Ge, X), E=130 MeV/nucleon; measured yields of reaction products, delayed Eγ. 64V; deduced isomer and its half-life.

doi: 10.1103/PhysRevC.89.067303
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2013GI02      Nucl.Phys. A899, 116 (2013)

L.Giot, J.A.Alcantara-Nunez, J.Benlliure, D.Perez-Loureiro, L.Audouin, A.Boudard, E.Casarejos, T.Enqvist, J.E.Ducret, B.Fernandez-Dominguez, M.Fernandez-Ordonez, F.Farget, A.Heinz, V.Henzl, D.Henzlova, A.Kelic-Heil, A.Lafriaskh, S.Leray, P.Napolitani, C.Paradela, J.Pereira, M.V.Ricciardi, C.Stephan, K.-H.Schmidt, C.Schmitt, L.Tassan-Got, C.Villagrasa, C.Volant, O.Yordanov

Isotopic production cross sections of the residual nuclei in spallation reactions induced by 136Xe projectiles on proton at 500 A MeV

NUCLEAR REACTIONS 1H(136Xe, X), E=500 MeV/nucleon; measured spallation products mass, charge distribution using FRS magnetic spectrometer; deduced fragment isotopes yields, production σ, longitudinal momentum distributions. Compared with published data at 1000 MeV/nucleon.

doi: 10.1016/j.nuclphysa.2012.12.119
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2143.


2013TA14      Phys.Rev. C 87, 054612 (2013)

O.B.Tarasov, M.Portillo, D.J.Morrissey, A.M.Amthor, L.Bandura, T.Baumann, D.Bazin, J.S.Berryman, B.A.Brown, G.Chubarian, N.Fukuda, A.Gade, T.N.Ginter, M.Hausmann, N.Inabe, T.Kubo, J.Pereira, B.M.Sherrill, A.Stolz, C.Sumithrarachchi, M.Thoennessen, D.Weisshaar

Production cross sections from 82Se fragmentation as indications of shell effects in neutron-rich isotopes close to the drip-line

NUCLEAR REACTIONS Be, W(82Se, X), E=139 MeV/nucleon; measured fragment spectra using A1900 fragment separator at NSCL facility. Z=11, A=27-33; Z=12, A=29-37; Z=13, A=31-39; Z=14, A=29-42; Z=15, A=31-45; Z=16, A=33-48; Z=17, A=35-50; Z=18, A=38-52; Z=19, A=39-55; Z=20, A=41-58; Z=21, A=43-61; Z=22, A=46-64; Z=23, A=47-67; Z=24, A=50-70; Z=25, A=52-72; Z=26, A=54-60; Z=26, A=63-75; Z=27, A=56-62; Z=27, A=65-76; Z=28, A=60-63; Z=28, A=67-78; Z=29, A=62-65; Z=29, A=70-78; Z=30, A=64-68; Z=30, A=73-80; Z=31, A=75-81; Z=32, A=79-82; Z=33, A=81-83; measured production cross sections for 334 isotopes, and longitudinal momentum distributions for 126 isotopes. 64Ti, 67V, 69,70Cr, 72Mn, 75Fe; measured production cross sections for isotopes first identified in this study. Comparison with calculations using abrasion-ablation model. Evidence for subshell closure at N=34 around Z=20.

doi: 10.1103/PhysRevC.87.054612
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2012BE38      J.Phys.:Conf.Ser. 337, 012070 (2012)

J.Benlliure, H.Alvarez-Pol, T.Kurtukian-Nieto, A.I.Morales, L.Audouin, F.Becker, B.Blank, I.Borzov, E.Casarejos, D.Cortina-Gil, B.Fernandez, J.Giovinazzo, D.Henzlova, B.Jurado, L.Langanke, G.Martinez-Pinedo, P.Napolitani, J.Pereira, F.Rejmund, K.-H.Schmidt, O.Yordanov, for the RISING Collaboration

Approaching r-process nuclei at N = 126

RADIOACTIVITY 194,195,196Re, 199,200Os, 198,201,202Ir, 203,204Pt, 204Au(β-); measured Iβ(t) using DSSSD; deduced T1/2; calculated T1/2 using Gross theory, FR droplet model and energy-density functional.

doi: 10.1088/1742-6596/337/1/012070
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2012CH18      Phys.Rev. C 85, 045809 (2012)

J.Chen, A.A.Chen, A.M.Amthor, D.Bazin, A.D.Becerril, A.Gade, D.Galaviz, T.Glasmacher, D.Kahl, G.Lorusso, M.Matos, C.V.Ouellet, J.Pereira, H.Schatz, K.Smith, B.Wales, D.Weisshaar, R.G.T.Zegers

26Si excited states via one-neutron removal from a 27Si radioactive ion beam

NUCLEAR REACTIONS 1H, C(27Si, 26Si), [27Si secondary beam from 9Be(36Ar, X), E=150 MeV/nucleon primary beam], E=84.3 MeV/nucleon; measured energy loss and residual energy for the fragments, Eγ, Iγ, γγ-coin, Doppler corrected γ-ray spectra using SeGA array at NSCL, MSU facility. 26Si; deduced levels. Comparison with previous studies.

doi: 10.1103/PhysRevC.85.045809
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2012LO08      Phys.Rev. C 86, 014313 (2012)

G.Lorusso, A.Becerril, A.Amthor, T.Baumann, D.Bazin, J.S.Berryman, B.A.Brown, R.H.Cyburt, H.L.Crawford, A.Estrade, A.Gade, T.Ginter, C.J.Guess, M.Hausmann, G.W.Hitt, P.F.Mantica, M.Matos, R.Meharchand, K.Minamisono, F.Montes, G.Perdikakis, J.Pereira, M.Portillo, H.Schatz, K.Smith, J.Stoker, A.Stolz, R.G.T.Zegers

β-delayed proton emission in the 100Sn region

RADIOACTIVITY 89Ru, 91,92Rh, 93Pd, 95,96,96mAg, 96,97,97mCd, 98,98m,99,100In, 100,101Sn[from 9Be(112Sn, X), E=140 MeV/nucleon](β+), (EC), (β+p); measured Eγ, Iγ, β spectra, E(p), I(p), βγ-coin, βp-coin, γβp-coin, fragment yields, half-lives, β-delayed proton emission branching ratios using NSCL Beta Counting System and SeGA array. Discussed rp-process implications. Comparison with previous studies and theoretical calculations. X-ray bursts calculations.

doi: 10.1103/PhysRevC.86.014313
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2012ME05      Phys.Rev.Lett. 108, 122501 (2012)

R.Meharchand, R.G.T.Zegers, B.A.Brown, Sam M.Austin, T.Baugher, D.Bazin, J.Deaven, A.Gade, G.F.Grinyer, C.J.Guess, M.E.Howard, H.Iwasaki, S.McDaniel, K.Meierbachtol, G.Perdikakis, J.Pereira, A.M.Prinke, A.Ratkiewicz, A.Signoracci, S.Stroberg, L.Valdez, P.Voss, K.A.Walsh, D.Weisshaar, and R.Winkler

Probing Configuration Mixing in 12Be with Gamow-Teller Transition Strengths

NUCLEAR REACTIONS Li(12B, 7Be)12Be, E=80 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced σ(θ), B(GT) transition strength, level energies, J, π. Comparison with shell model calculations.

doi: 10.1103/PhysRevLett.108.122501
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2012PO03      Acta Phys.Pol. B43, 267 (2012)

M.Pomorski, M.Pfutzner, W.Dominik, R.Grzywacz, T.Baumann, J.Berryman, H.Czyrkowski, R.Dabrowski, T.Ginter, L.Grigorenko, J.Johnson, G.Kaminski, A.Kuzniak, N.Larson, S.N.Liddick, M.Madurga, C.Mazzocchi, S.Mianowski, K.Miernik, D.Miller, S.Palauskas, J.Pereira, K.P.Rykaczewski, A.Stolz, S.Suchyta

Studies of 48Ni Using the Optical Time Projection Chamber

RADIOACTIVITY 48Ni(2p) [from Ni(58Ni, X)48Ni/46Fe/44Cr, E=160 MeV/nucleon]; measured decay products, Ep, Ip; deduced proton energy distribution, T1/2.

NUCLEAR REACTIONS Ni(58Ni, X)48Ni/46Fe/44Cr, E=160 MeV/nucleon; measured reaction products. 48Ni; deduced production σ.

doi: 10.5506/APhysPolB.43.267
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2012QU01      Phys.Rev. C 85, 035807 (2012)

M.Quinn, A.Aprahamian, J.Pereira, R.Surman, O.Arndt, T.Baumann, A.Becerril, T.Elliot, A.Estrade, D.Galaviz, T.Ginter, M.Hausmann, S.Hennrich, R.Kessler, K.-L.Kratz, G.Lorusso, P.F.Mantica, M.Matos, F.Montes, B.Pfeiffer, M.Portillo, H.Schatz, F.Schertz, L.Schnorrenberger, E.Smith, A.Stolz, W.B.Walters, A.Wohr

β decay of nuclei around 90Se: Search for signatures of a N=56 subshell closure relevant to the r process

NUCLEAR REACTIONS 9Be(136Xe, X)86As/87As/88As/88Se/89Se/90Se/90Br/91Br/92Br/93Br/91Kr/92Kr/93Kr/94Kr/95Kr/93Rb/94Rb/95Rb/96Rb/97Rb/95Sr/96Sr/97Sr/98Sr/99Sr/97Y/98Y/99Y/100Y/101Y/100Zr/101Zr/102Zr/103Zr, E=120 MeV/nucleon; measured fragment spectra by energy loss and time-of-flight, total kinetic energies (TKE) of 97,98,99Sr fragments in 36+, 37+, 38+ charge states, half-lives by fragment-β correlations. Beta Counting System (BCS) at NSCL.

RADIOACTIVITY 87,88As, 88,89,90Se, 90,91,92,93Br, 93,94,95Kr, 95,96,97Rb, 96,97,98,99Sr, 99,100,101Y(β-)[from 9Be(136Xe, X), E=120 MeV/nucleon]; measured Eβ, Eγ, (fragment)β correlations, half-lives. Beta Counting System (BCS) at NSCL and SEGA array. Maximum likelihood and least-squares analyses for half-lives. Comparison of measured half-lives with QRPA calculations used in r process, and with previous measurements. Role of g9/2 proton and h11/2 neutron intruders. No evidence of N=56 subshell closure in 90Se. Relevance to r-process nuclei.

doi: 10.1103/PhysRevC.85.035807
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2011BE34      Phys.Rev. C 84, 041303 (2011)

A.D.Becerril, G.Lorusso, A.M.Amthor, T.Baumann, D.Bazin, J.S.Berryman, B.A.Brown, H.L.Crawford, A.Estrade, A.Gade, T.Ginter, C.J.Guess, M.Hausmann, G.W.Hitt, P.F.Mantica, M.Matos, R.Meharchand, K.Minamisono, F.Montes, G.Perdikakis, J.Pereira, M.Portillo, H.Schatz, K.Smith, J.Stoker, A.Stolz, R.G.T.Zegers

High-spin μs isomeric states in 96Ag

NUCLEAR REACTIONS 9Be(112Sn, X), E=120 MeV/nucleon; measured Eγ, Iγ, γγ-, (fragment)γγ-coin, isomer T1/2. 96Ag; deduced levels, J, π. A1900 Fragment Separator and SeGA array at NSCL. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.84.041303
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2011ES06      Phys.Rev.Lett. 107, 172503 (2011)

A.Estrade, M.Matos, H.Schatz, A.M.Amthor, D.Bazin, M.Beard, A.Becerril, E.F.Brown, R.Cyburt, T.Elliot, A.Gade, D.Galaviz, S.George, S.S.Gupta, W.R.Hix, R.Lau, G.Lorusso, P.Moller, J.Pereira, M.Portillo, A.M.Rogers, D.Shapira, E.Smith, A.Stolz, M.Wallace, M.Wiescher

Time-of-Flight Mass Measurements for Nuclear Processes in Neutron Star Crusts

ATOMIC MASSES 53,54,55Sc, 57Ti, 60,61V, 63Cr, 65,66Mn, 67,68Fe, 68,69,70,71Co, 74Ni; measured time of flight; deduced masses. Stellar nucleosynthesis implications.

doi: 10.1103/PhysRevLett.107.172503
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2011LI50      Phys.Rev. C 84, 061305 (2011)

S.N.Liddick, S.Suchyta, B.Abromeit, A.Ayres, A.Bey, C.R.Bingham, M.Bolla, M.P.Carpenter, L.Cartegni, C.J.Chiara, H.L.Crawford, I.G.Darby, R.Grzywacz, G.Gurdal, S.Ilyushkin, N.Larson, M.Madurga, E.A.McCutchan, D.Miller, S.Padgett, S.V.Paulauskas, J.Pereira, M.M.Rajabali, K.Rykaczewski, S.Vinnikova, W.B.Walters, S.Zhu

Shape coexistence along N=40

RADIOACTIVITY 64,66Mn(IT)[from 9Be(76Ge, X), E=140 MeV/nucleon]; 64,66Cr(β-)[from 9Be(86Kr, X), E=130 MeV/nucleon]; measured Eγ, Iγ, (fragment)βγ-, γγ-coin, γ(t), half-lives. 64,66Mn; deduced levels, J, π, beta feedings, log ft, configurations.

doi: 10.1103/PhysRevC.84.061305
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2011LO09      Phys.Lett. B 699, 141 (2011)

G.Lorusso, A.Becerril, A.Amthor, T.Baumann, D.Bazin, J.S.Berryman, B.A.Brown, R.H.Cyburt, H.L.Crawford, A.Estrade, A.Gade, T.Ginter, C.J.Guess, M.Hausmann, G.W.Hitt, P.F.Mantica, M.Matos, R.Meharchand, K.Minamisono, F.Montes, G.Perdikakis, J.Pereira, M.Portillo, H.Schatz, K.Smith, J.Stoker, A.Stolz, R.G.T.Zegers

Half-lives of ground and isomeric states in 97Cd and the astrophysical origin of 96Ru

RADIOACTIVITY 97Cd(β+), (β+p) [from 9Be(112Sn, X), E=120 MeV/nucleon]; measured proton spectra, Eγ, Iγ; deduced evidence for a high spin isomer (25/2+), T1/2, level energies, J, π. Comparison with nuclear shell model and astrophysical overproduction factors calculations.

doi: 10.1016/j.physletb.2011.03.043
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2011PE34      J.Phys.:Conf.Ser. 312, 042019 (2011)

J.Pereira, A.Aprahamian, O.Arndt, A.Becerril, T.Elliot, A.Estrade, D.Galaviz, S.Hennrich, P.Hosmer, R.Kessler, K.-L.Kratz, G.Lorusso, P.F.Mantica, M.Matos, F.Montes, B.Pfeiffer, M.Quinn, P.Santi, H.Schatz, F.Schertz, L.Schnorrenberger, E.Smith, A.Stolz, W.B.Walters, A.Wohr

β-decay measurements of A simeq 70 ≈ 110 r-process nuclei at the National Superconducting Cyclotron Laboratory

RADIOACTIVITY 106,107,108,109Nb, 108,109,110,111Mo(β-); compiled T1/2; calculated T1/2, Solar system r-process abundances using new T1/2.

doi: 10.1088/1742-6596/312/4/042019
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2011PO09      Phys.Rev. C 83, 061303 (2011)

M.Pomorski, M.Pfutzner, W.Dominik, R.Grzywacz, T.Baumann, J.S.Berryman, H.Czyrkowski, R.Dabrowski, T.Ginter, J.Johnson, G.Kaminski, A.Kuzniak, N.Larson, S.N.Liddick, M.Madurga, C.Mazzocchi, S.Mianowski, K.Miernik, D.Miller, S.Paulauskas, J.Pereira, K.P.Rykaczewski, A.Stolz, S.Suchyta

First observation of two-proton radioactivity in 48Ni

RADIOACTIVITY 48Ni(2p), (β+p)[from Ni(58Ni, X), E=160 MeV/nucleon]; measured E(p), I(p), time-of-flight using optical time-projection chamber (OPTC), half-life; deduced branching ratios for the two-proton and delayed-proton decay modes. 46Fe(β+p); measured E(p), I(p).

doi: 10.1103/PhysRevC.83.061303
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2010AL24      Phys.Rev. C 82, 041602 (2010)

H.Alvarez-Pol, J.Benlliure, E.Casarejos, L.Audouin, D.Cortina-Gil, T.Enqvist, B.Fernandez-Dominguez, A.R.Junghans, B.Jurado, P.Napolitani, J.Pereira, F.Rejmund, K.-H.Schmidt, O.Yordanov

Production of new neutron-rich isotopes of heavy elements in fragmentation reactions of 238U projectiles at 1A GeV

NUCLEAR REACTIONS 9Be(238U, X), E=1 GeV/nucleon; measured fragment residues using a high resolution magnetic spectrometer Fragment Separator, σ, yields. 203,204,205Pt, 207,208,209,210Au, 210,211,212,213,214,215,216Hg, 210,211,212,213,214,215,216,217Tl, 214,215,216,217,218,219,220Pb, 217,218,219,220,221,222,223,224Bi, 220,221,222,223,224,225,226,227Po, 222,223,224,225,226,227,228,229At, 225,226,227,228,229,230,231Rn, 228,229,230,232,232,233Fr; deduced yields, production σ. Comparisons of σ with the predictions obtained using the computer codes COFRA and EPAX.

doi: 10.1103/PhysRevC.82.041602
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2010GA36      J.Phys.:Conf.Ser. 202, 012009 (2010)

D.Galaviz, A.M.Amthor, D.Bazin, A.D.Becerril, B.A.Brown, A.A.Chen, A.Cole, J.M.Cook, T.Elliot, A.Estrade, Z.S.Fulop, A.Gade, T.Glasmacher, A.Heger, M.E.Howard, R.Kessler, G.Lorusso, M.Matos, F.Montes, W.Muller, J.Pereira, H.Schatz, B.Sherrill, F.Schertz, Y.Shimbara, E.Smith, K.Smith, A.Tamii, A.Stolz, D.Weisshaar, M.Wallace, M.Wiescher, R.G.T.Zegers

Nucleosynthesis of proton-rich nuclei. Experimental results on the rp-process

NUCLEAR REACTIONS 9Be(36Ar, X)30S, (40Ca, X)36K, (40Ca, X)37Ca, E=140 MeV/nucleon; measured 30S, 36K, 37Ca [obtained by further stripping of one nucleon from fragmentation product] in-flight Eγ, Iγ, (recoil)γ-coin; deduced 29P(p, γ)30S stellar reaction rate relevant to X-bursts. Compared with other published reaction rates.

doi: 10.1088/1742-6596/202/1/012009
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2010HO12      Phys.Rev. C 82, 025806 (2010)

P.Hosmer, H.Schatz, A.Aprahamian, O.Arndt, R.R.C.Clement, A.Estrade, K.Farouqi, K.-L.Kratz, S.N.Liddick, A.F.Lisetskiy, P.F.Mantica, P.Moller, W.F.Mueller, F.Montes, A.C.Morton, M.Ouellette, E.Pellegrini, J.Pereira, B.Pfeiffer, P.Reeder, P.Santi, M.Steiner, A.Stolz, B.E.Tomlin, W.B.Walters, A.Wohr

Half-lives and branchings for β-delayed neutron emission for neutron-rich Co-Cu isotopes in the r-process

RADIOACTIVITY 73,74,75Co, 75,76,77,78Ni, 76,77,78,79,80Cu, 79,80,81Zn, 81,82Ga(β-), (β-n)[from Be(86Kr, X), E=140 MeV/nucleon]; measured β spectra, βn-coin, neutron spectra, half-lives, delayed neutron-emission probabilities; calculated half-lives, P(n) using QRPA, CQRPA and OXBASH shell model. Discussed effects on various types of models for the rapid neutron-capture process (r-process) in nucleosynthesis. A=1-210; calculated abundances with classical r-process and HEW models using known decay data. 78Ni(β-); calculated Gamow-Teller strengths, effect on abundances.

doi: 10.1103/PhysRevC.82.025806
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2010SA12      Phys.Rev. C 81, 064314 (2010)

P.Sarriguren, J.Pereira

β-decay properties of neutron-rich Zr and Mo isotopes

RADIOACTIVITY 100,102,104,106,108,110Zr, 104,106,108,110,112,114Mo(β-); calculated Gamow-Teller strength distributions, accumulated GT strengths, Qβ, neutron separation energies, half-lives, and β-delayed neutron emission probabilities using deformed quasiparticle random-phase approximation based on self-consistent Skyrme Hartree-Fock approach. Comparison with experimental data.

NUCLEAR STRUCTURE 100,102,104,106,108,110Zr, 104,106,108,110,112,114Mo; calculated potential energy curves as function of quadrupole deformation using constrained HF+BCS method with the Skyrme forces SG2 and SLy4.

doi: 10.1103/PhysRevC.81.064314
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2010TR03      Phys.Rev.Lett. 104, 129202 (2010)

V.Tripathi, S.L.Tabor, P.F.Mantica, Y.Utsuno, P.Bender, J.Cook, C.R.Hoffman, S.Lee, T.Otsuka, J.Pereira, M.Perry, K.Pepper, J.S.Pinter, J.Stoker, A.Volya, D.Weisshaar

Reply: "Intruder Configurations in the A=33 Isobars: 33Mg and 33Al"

NUCLEAR STRUCTURE 33Mg; analyzed 33Mg β-decay data; deduced 33Mg π.

doi: 10.1103/PhysRevLett.104.129202
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2009AL32      Eur.Phys.J. A 42, 485 (2009)

H.Alvarez-Pol, J.Benlliure, E.Casarejos, L.Audouin, D.Cortina-Gil, T.Enqvist, B.Fernandez, A.R.Junghans, B.Jurado, P.Napolitani, J.Pereira, F.Rejmund, K.-H.Schmidt, O.Yordanov

Production cross-sections of neutron-rich Pb and Bi isotopes in the fragmentation of 238U

NUCLEAR REACTIONS 9Be(238U, X)196Pb/197Pb/198Pb/199Pb/200Pb/201Pb/202Pb/203Pb/204Pb/205Pb/206Pb/207Pb/208Pb/209Pb/210Pb/214Pb/215Pb/216Pb/217Pb/218Pb/219Pb/199Bi/200Bi/201Bi/202Bi/203Bi/204Bi/205Bi/206Bi/207Bi/208Bi/209Bi/210Bi/211Bi/212Bi/213Bi/214Bi/218Bi/219Bi/220Bi/221Bi/222Bi/223Bi, E=1 GeV/nucleon; measured production σ. Comparison with other data.

doi: 10.1140/epja/i2009-10856-8
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2009AR04      Acta Phys.Pol. B40, 437 (2009)

O.Arndt, S.Hennrich, N.Hoteling, C.J.Jost, B.E.Tomlin, J.Shergur, K.-L.Kratz, P.F.Mantica, B.A.Brown, R.V.F.Janssens, W.B.Walters, B.Pfeiffer, A.Wohr, S.Zhu, R.Broda, M.P.Carpenter, B.Fornal, A.A.Hecht, W.Krolas, T.Lauritsen, T.Pawlat, J.Pereira, D.Seweryniak, I.Stefanescu, J.R.Stone, J.Wrzesinski

Structure of Neutron-Rich Odd-Mass 127, 129, 131In Populated in the Decay of 127, 129, 131Cd

RADIOACTIVITY 127,129,131Cd(β-); measured Iγ, Eγ; deduced Jπ, level scheme. Comparison with calculations.


2009CR02      Phys.Rev. C 79, 054320 (2009)

H.L.Crawford, P.F.Mantica, J.S.Berryman, R.Broda, B.Fornal, C.R.Hoffman, N.Hoteling, R.V.F.Janssens, S.M.Lenzi, J.Pereira, J.B.Stoker, S.L.Tabor, W.B.Walters, X.Wang, S.Zhu

Low-energy structure of 61Mn populated following β decay of 61Cr

RADIOACTIVITY 61Cr(β-)[from Be(76Ge, X), E=130 MeV/nucleon]; measured Eγ, Iγ, γγ-, βγ-coin, half-life. 61Mn; deduced levels, J, π. 54,56,58,60,62Cr, 56,58,60,62,64,66,68Fe, 58,60,62,64,66,68,70Ni, 57,59,61,63Mn; level systematics and shell-model calculations.

NUCLEAR REACTIONS 9Be(76Ge, X)57Sc/58Ti/59Ti/59V/60V/60Cr/61Cr/62Cr/62Mn/63Mn, E=130 MeV/nucleon; measured yields.

doi: 10.1103/PhysRevC.79.054320
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2009KU28      Nucl.Phys. A827, 587c (2009)

T.Kurtukian-Nieto, J.Benlliure, K.-H.Schmidt, L.Audouin, F.Becker, B.Blank, I.N.Borzov, E.Casarejos, M.Fernandez-Ordonez, J.Giovinazzo, D.Henzlova, B.Jurado, K.Langanke, G.Martinez-Pinedo, J.Pereira, F.Rejmund, O.Yordanov

Recent progress in measuring β half-lives of nuclei approaching the r-process waiting point A = 195

RADIOACTIVITY 194,195,196Re, 199,200Os, 198,199,200Ir(β-) [from Be(208Pb, X), E=1 GeV/nucleon]; measured T1/2. Comparison with two QRPA models.

doi: 10.1016/j.nuclphysa.2009.05.129
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2009MA28      Acta Phys.Pol. B40, 695 (2009)

M.Matos, A.Estrade, A.M.Amthor, D.Bazin, A.Becerril, T.Elliot, M.Famiano, A.Gade, D.Galaviz, G.Lorusso, J.Pereira, M.Portillo, A.Rogers, H.Schatz, D.Shapira, E.Smith, A.Stolz, M.Wallace

Time-of-Flight Mass Measurements and Their Importance for Nuclear Astrophysics


2009PE06      Phys.Rev. C 79, 035806 (2009)

J.Pereira, S.Hennrich, A.Aprahamian, O.Arndt, A.Becerril, T.Elliot, A.Estrade, D.Galaviz, R.Kessler, K.-L.Kratz, G.Lorusso, P.F.Mantica, M.Matos, P.Moller, F.Montes, B.Pfeiffer, H.Schatz, F.Schertz, L.Schnorrenberger, E.Smith, A.Stolz, M.Quinn, W.B.Walters, A.Wohr

β-decay half-lives and β-delayed neutron emission probabilities of nuclei in the region A ≤ 110, relevant for the r process

RADIOACTIVITY 100,101,102,103,104,105Y, 103,104,105,106,107Zr, 106,107,108,109Nb, 108,109,110,111Mo, 109,110,111,112,113Tc(β-), (β-n)[from 9Be(136Xe, X), E=120 MeV/nucleon]; measured fragments, neutrons, β, (fragment)β-coin, half-lives; deduced delayed neutron-emission probabilities. Comparisons with quasiparticle random phase approximation (QRPA03 and QRPA06) calculations. Discussed relevance to r-process nuclei.

doi: 10.1103/PhysRevC.79.035806
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2009ST04      Phys.Rev. C 79, 015803 (2009)

J.B.Stoker, P.F.Mantica, D.Bazin, A.Becerril, J.S.Berryman, H.L.Crawford, A.Estrade, C.J.Guess, G.W.Hitt, G.Lorusso, M.Matos, K.Minamisono, F.Montes, J.Pereira, G.Perdikakis, H.Schatz, K.Smith, R.G.T.Zegers

β-decay half-life of the rp-process waiting-point nuclide 84Mo

RADIOACTIVITY 80Y, 81Zr, 83,84Nb, 84Mo(EC), (β+) [from 9Be(124Xe, X), E=140 MeV/nucleon]; measured Eγ, (particle)-γ coin, (particle)-β coin, half-life. 64Ge, 68Se, 72Kr, 76Sr, 80Zr, 84Mo, 88Ru;systematics of half-lives and yrast states. Comparisons with QRPA predictions.

NUCLEAR REACTIONS 9Be(124Xe, X)73As/74Se/76Br/77Kr/78Rb/79Sr/80Y/81,82Zr/83Nb/84Nb/84Mo, E=140 MeV/nucleon; measured yields.

doi: 10.1103/PhysRevC.79.015803
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2009TA05      Phys.Rev.Lett. 102, 142501 (2009)

O.B.Tarasov, D.J.Morrissey, A.M.Amthor, T.Baumann, D.Bazin, A.Gade, T.N.Ginter, M.Hausmann, N.Inabe, T.Kubo, A.Nettleton, J.Pereira, M.Portillo, B.M.Sherrill, A.Stolz, M.Thoennessen

Evidence for a Change in the Nuclear Mass Surface with the Discovery of the Most Neutron-Rich Nuclei with 17 ≤ Z ≤ 25

NUCLEAR REACTIONS 9Be(76Ge, X)50Cl/53Ar/55K/56K/57Ca/58Ca/59Sc/60Sc/61Sc/62Ti/63Ti/65V/66V/68Cr/70Mn/52Ar, E=132 MeV/nucleon; measured cross sections.

doi: 10.1103/PhysRevLett.102.142501
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2009TA24      Phys.Rev. C 80, 034609 (2009)

O.B.Tarasov, M.Portillo, A.M.Amthor, T.Baumann, D.Bazin, A.Gade, T.N.Ginter, M.Hausmann, N.Inabe, T.Kubo, D.J.Morrissey, A.Nettleton, J.Pereira, B.M.Sherrill, A.Stolz, M.Thoennessen

Production of very neutron-rich nuclei with a 76Ge beam

NUCLEAR REACTIONS 9Be, W(76Ge, X)50Cl/53Ar/55K/56K/57Ca/58Ca/59Sc/60Sc/61Sc/62Ti/63Ti/65V/66V/68Cr/70Mn/52Ar, E=132 MeV/nucleon; measured fragment yields, production σ for A=33-74, Z=13-29 nuclides, longitudinal momentum distributions for Z=17-25 nuclides, time-of-flight. Comparison with various model calculations.

doi: 10.1103/PhysRevC.80.034609
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2008BA53      Phys.Rev.Lett. 101, 252501 (2008)

D.Bazin, F.Montes, A.Becerril, G.Lorusso, A.Amthor, T.Baumann, H.Crawford, A.Estrade, A.Gade, T.Ginter, C.J.Guess, M.Hausmann, G.W.Hitt, P.Mantica, M.Matos, R.Meharchand, K.Minamisono, G.Perdikakis, J.Pereira, J.Pinter, M.Portillo, H.Schatz, K.Smith, J.Stoker, A.Stolz, R.G.T.Zegers

Production and β Decay of rp-Process Nuclei 96Cd, 98In, and 100Sn

NUCLEAR REACTIONS 9Be(112Sn, X)96Cd/98In/100Sn, E=120 MeV/nucleon; measured cross sections.

RADIOACTIVITY 96Cd, 98In, 100Sn; measured decay spectra, half-lives.

doi: 10.1103/PhysRevLett.101.252501
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