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NSR database version of April 24, 2024.

Search: Author = B.P.Kay

Found 93 matches.

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2023AY06      Eur.Phys.J. A 59, 294 (2023)

Y.Ayyad, A.K.Anthony, D.Bazin, J.Chen, G.W.McCann, W.Mittig, B.P.Kay, D.K.Sharp, J.C.Zamora

Kinematics reconstruction in solenoidal spectrometers operated in active target mode

NUCLEAR REACTIONS 2H(10Be, 10Be'), E=9 MeV/nucleon; 1H(14C, p), (14C, p'), (14C, d), E=12 MeV/nucleon; measured reaction products; deduced yields. The Active Target Time Projection Chamber (AT-TPC) of the Facility for Rare Isotope (FRIB) of the Michigan State University (MSU).

doi: 10.1140/epja/s10050-023-01205-2
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2023BE06      Phys.Rev.Lett. 130, 202501 (2023)

S.A.Bennett, K.Garrett, D.K.Sharp, S.J.Freeman, A.G.Smith, T.J.Wright, B.P.Kay, T.L.Tang, I.A.Tolstukhin, Y.Ayyad, J.Chen, P.J.Davies, A.Dolan, L.P.Gaffney, A.Heinz, C.R.Hoffman, C.Muller-Gatermann, R.D.Page, G.L.Wilson

Direct Determination of Fission-Barrier Heights Using Light-Ion Transfer in Inverse Kinematics

NUCLEAR REACTIONS 2H(238U, F), E=8.6 MeV/nucleon; measured reaction products. 239U; deduced fission probability, fission barrier height. Comparison with GEF simulations. The ATLAS accelerator.

doi: 10.1103/PhysRevLett.130.202501
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2023HE08      J.Phys.(London) G50, 060501 (2023)

C.Hebborn, F.M.Nunes, G.Potel, W.H.Dickhoff, J.W.Holt, M.C.Atkinson, R.B.Baker, C.Barbieri, G.Blanchon, M.Burrows, R.Capote, P.Danielewicz, M.Dupuis, C.Elster, J.E.Escher, L.Hlophe, A.Idini, H.Jayatissa, B.P.Kay, K.Kravvaris, J.J.Manfredi, A.Mercenne, B.Morillon, G.Perdikakis, C.D.Pruitt, G.H.Sargsyan, I.J.Thompson, M.Vorabbi, T.R.Whitehead

Optical potentials for the rare-isotope beam era

doi: 10.1088/1361-6471/acc348
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2023JI10      Phys.Rev. C 108, L051604 (2023)

C.L.Jiang, W.F.Henning, B.P.Kay, N.Watwood

Structures in the heavy-ion fusion excitation function at and above the Coulomb barrier

doi: 10.1103/PhysRevC.108.L051604
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2023JI11      Phys.Rev. C 108, L051605 (2023)

C.L.Jiang, W.F.Henning, C.R.Hoffman, B.P.Kay, N.Watwood

Unexpected character of the heavy-ion fusion excitation function and the compound channel effect

doi: 10.1103/PhysRevC.108.L051605
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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.


2022CH55      Phys.Rev. C 106, 064312 (2022)

J.Chen, B.P.Kay, T.L.Tang, I.A.Tolstukhin, C.R.Hoffman, H.Li, P.Yin, X.Zhao, P.Maris, J.P.Vary, G.Li, J.L.Lou, M.L.Avila, Y.Ayyad, S.Bennett, D.Bazin, J.A.Clark, S.J.Freeman, H.Jayatissa, C.Muller-Gatermann, A.Munoz-Ramos, D.Santiago-Gonzalez, D.K.Sharp, A.H.Wuosmaa, C.X.Yuan

Probing the quadrupole transition strength of 15C via deuteron inelastic scattering

NUCLEAR REACTIONS 1H(15C, p), 2H(15C, d);E=7.1 MeV/nucleon; measured reaction products, Ep, Ip, deuteron spectrum; deduced elastic and inelastic scattering σ(θ). 15C; deduced B(E2), proton quadrupole matrix element, ratio of neutron and proton matrix elements, proton deformation length, core polarization parameters, neutron effective charge; calculated levels, J, π, B(E2), magnetic dipole moments. Comparison to data on 17O and other C isotopes. Ab initio no-core configuration interaction (NCCI) calculations with Daejeon16 interaction. HELIOS spectrometer at ATLAS in-flight facility (Argonne National Laboratory).

doi: 10.1103/PhysRevC.106.064312
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2022HO08      Nucl.Instrum.Methods Phys.Res. A1032, 166612 (2022)

C.R.Hoffman, T.L.Tang, M.Avila, Y.Ayyad, K.W.Brown, J.Chen, K.A.Chipps, H.Jayatissa, B.P.Kay, C.Muller-Gatermann, H.J.Ong, J.Song, G.L.Wilson

In-flight production of an isomeric beam of 16N

NUCLEAR REACTIONS 2H(15N, p)16N, E=8.1, 13.5 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced isomer fraction. Argonne Tandem Linear Accelerator System (ATLAS) in-flight system.

doi: 10.1016/j.nima.2022.166612
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2022JA08      Phys.Rev. C 105, L042802 (2022)

H.Jayatissa, M.L.Avila, K.E.Rehm, R.Talwar, P.Mohr, K.Auranen, J.Chen, D.A.Gorelov, C.R.Hoffman, C.L.Jiang, B.P.Kay, S.A.Kuvin, D.Santiago-Gonzalez

First direct measurement of the 13N(α, p)16O reaction relevant for core-collapse supernovae nucleosynthesis

NUCLEAR REACTIONS 4He(13N, p), E=34.6 MeV; measured energies and yields of reaction products; deduced σ(Ε) in the range E(cm)=3.26–6.02 MeV, astrophysical S-factor. 4He(13N, p), T=0.8-10.0 GK; deduced astrophysical reaction rates. Comparison to other experimental data, TALYS calculations and data from REACLIB. MUlti-Sampling Ionization Chamber (MUSIC) detector filled with He-Kr gas mixture at ATLAS (ANL).

doi: 10.1103/PhysRevC.105.L042802
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2747.


2022JI10      Phys.Rev. C 105, 064601 (2022)

C.L.Jiang, B.P.Kay

Heavy-ion fusion cross section formula and barrier height distribution

NUCLEAR REACTIONS 96Zr(40Ca, X), 194Pt(40Ca, X), 154Sm(16O, X), 144Sm(16O, X), 192Os(40Ca, X), 209Bi(11B, X), E not given; analyzed experimental data on σ and excitation functions for several fusioning systems 16O+208Pb, 32S+89Y, 40Ca+40Ca, 40Ca+96Zr, 8Ni+60Ni, 48Ca+48Ca, 40Ca+90Zr, 11Be+209Bi, 40Ca+132Sn, 58Ni+58Ni, 12C+30Si, 24Mg+30Si, 40Ar+112Sn, 40Ar+154Sm, 64Ni+124Sn; deduced excitation function, barrier height distributions, σ(E). The reciprocal of a fusion representation method based on a double integration of a parametrized barrier distribution. Applied three-Gaussian (3G) and a four-Gaussian (4G) description of barrier distribution. Claimed the existence of narrow barrier peak at energies higher than the Coulomb barrier for most fusion systems. Comparison to experimental data.

doi: 10.1103/PhysRevC.105.064601
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2022KA36      Phys.Rev.Lett. 129, 152501 (2022)

B.P.Kay, T.L.Tang, I.A.Tolstukhin, G.B.Roderick, A.J.Mitchell, Y.Ayyad, S.A.Bennett, J.Chen, K.A.Chipps, H.L.Crawford, S.J.Freeman, K.Garrett, M.D.Gott, M.R.Hall, C.R.Hoffman, H.Jayatissa, A.O.Macchiavelli, P.T.MacGregor, D.K.Sharp, G.L.Wilson

Quenching of Single-Particle Strength in A = 15 Nuclei

NUCLEAR REACTIONS 2H(14C, p), (14N, p), E=10 MeV/nucleon; measured reaction products, Ep, Ip. 15C, 15N; deduced σ(θ), Q-value, the difference between the neutron and proton separation energies, degree of quenching. Comparison with the independent single-particle and shell model calculations. The HELIOS spectrometer at the ATLAS facility at Argonne National Laboratory.

doi: 10.1103/PhysRevLett.129.152501
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Data from this article have been entered in the XUNDL database. For more information, click here.


2022SC04      Phys.Rev. C 105, L041302 (2022)

J.P.Schiffer, B.P.Kay, J.Chen

Single-nucleon energies changing with nucleon number

NUCLEAR STRUCTURE A=16-208; analyzed available data on neutron and proton single-particle energies for 33 different orbitals in even-even nuclei. Discussed the dependence of energy of states depending on the number of neutrons and protons. Pointed out that change in energy of neutron states with neutron number or proton states with protons number is approximately a factor of four weaker in magnitude.

doi: 10.1103/PhysRevC.105.L041302
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2022TA07      Phys.Rev. C 105, 064307 (2022)

T.L.Tang, C.R.Hoffman, B.P.Kay, I.A.Tolstukhin, S.Almaraz-Calderon, B.W.Asher, M.L.Avila, Y.Ayyad, K.W.Brown, D.Bazin, J.Chen, K.A.Chipps, P.A.Copp, M.Hall, H.Jayatissa, H.J.Ong, D.Santiago-Gonzalez, D.K.Sharp, J.Song, S.Stolze, G.L.Wilson, J.Wu

Experimental study of the isomeric state in 16N using the 16Ng, m(d, 3He) reaction

NUCLEAR REACTIONS 2H(16N, 3He), (16mN, 3He), E=11.8 MeV/nucleon, [secondary 16N mixed beam of ground state and the isomeric state produced in 2H(15N, 16N) primary reaction at ATLAS-ANL facility]; measured reaction products, 3He spectra, (recoils)(3He)-coin, angular distributions using HELIOS spectrometer. 15C; deduced levels, J, π, spectroscopic factors, DWBA calculations. 16mN; deduced neutron-halo of the isomeric state. Comparison with Woods-Saxon potential model calculations.

doi: 10.1103/PhysRevC.105.064307
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2772. Data from this article have been entered in the XUNDL database. For more information, click here.


2021AU02      Prog.Part.Nucl.Phys. 118, 103847 (2021)

T.Aumann, C.Barbieri, D.Bazin, C.A.Bertulani, A.Bonaccorso, W.H.Dickhoff, A.Gade, M.Gomez-Ramos, B.P.Kay, A.M.Moro, T.Nakamura, A.Obertelli, K.Ogata, S.Paschalis, T.Uesaka

Quenching of single-particle strength from direct reactions with stable and rare-isotope beams

doi: 10.1016/j.ppnp.2021.103847
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2021KA13      Phys.Rev. C 103, 024319 (2021)

B.P.Kay, J.P.Schiffer, S.J.Freeman, T.L.Tang, B.D.Cropper, T.Faestermann, R.Hertenberger, J.M.Keatings, P.T.MacGregor, J.F.Smith, H.-F.Wirth

Consistency of nucleon-transfer sum rules in well-deformed nuclei

NUCLEAR REACTIONS 154,156,157,158Gd, 156,158,160,162,164Dy, 168,170,172,174Yb, 162,164,166,168,170Er(d, p), (d, t), E=12.1 MeV; analyzed cross section data from neutron-adding and neutron-removing reactions from experiments at Niels Bohr Institute (NBI), and reported in 1966Bu16, 1967Tj01, 1969Tj01 and 1970Gr46, and complemented by new experiments at MLL-Munich; deduced consistent nucleon-transfer sum rules, as defined in Nilsson-model framework, in well-deformed nuclei.

NUCLEAR REACTIONS 170Er, 174Yb(d, p), (d, t), E=12 MeV; 170Er, 174Yb(p, d), E=18 MeV; measured proton, triton and deuteron spectra, differential σ(θ) using Q3D magnetic spectrometer at the MLL-Munich MP tandem accelerator. 169,171Er, 173,175Yb; deduced levels, J, π, Nilsson configurations, sum rules.

doi: 10.1103/PhysRevC.103.024319
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2021MA21      Phys.Rev. C 103, 034307 (2021)

A.O.Macchiavelli, H.L.Crawford, R.M.Clark, P.Fallon, I.Y.Lee, C.Morse, C.M.Campbell, M.Cromaz, C.Santamaria, J.Chen, C.R.Hoffman, B.P.Kay

Coriolis coupling effects in proton-pickup spectroscopic factors from 12B

NUCLEAR REACTIONS 2H(12B, 3He)11Be, E=12 MeV/nucleon; analyzed Coriolis coupling effects in proton-pickup spectroscopic factors extracted from experimental data in 2019Ch51. 11B; calculated levels, J, π, Coriolis mixing amplitudes of the proton Nilsson states using the particle rotor model (PRM) and compared with the experimental data. 11Be, 11B; calculated L=1 proton-removal spectroscopic factors from 1- 11B and 0+ 12C ground states using PRM, and compared with experimental data. 12B; deduced evidence of Coriolis coupling in the ground state.

doi: 10.1103/PhysRevC.103.034307
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2021MA72      Phys.Rev. C 104, L051301 (2021)

P.T.MacGregor, D.K.Sharp, S.J.Freeman, C.R.Hoffman, B.P.Kay, T.L.Tang, L.P.Gaffney, E.F.Baader, M.J.G.Borge, P.A.Butler, W.N.Catford, B.D.Cropper, G.de Angelis, J.Konki, Th.Kroll, M.Labiche, I.H.Lazarus, R.S.Lubna, I.Martel, D.G.McNeel, R.D.Page, O.Poleshchuk, R.Raabe, F.Recchia, J.Yang

Evolution of single-particle structure near the N=20 island of inversion

NUCLEAR REACTIONS 2H(28Mg, p)29Mg, E=9.47 MeV/nucleon, [secondary 28Mg beam from Si(p, X), E=1.4 GeV, followed resonant ionization by the resonance ionization laser ion source (RILIS), and mass separated and injected into an ion trap at the HIE-ISOLDE-CERN Linac facility]; measured E(p), I(p), σ(θ) using ISOLDE Solenoidal Spectrometer. 29Mg; deduced levels, J, π, L-transfers, spectroscopic factors, vacancies deduced from summed spectroscopic factors, binding energies of single-particle centroids. Comparison with shell-model calculations. Detailed σ(θ) data are tabulated in the Supplemental Material.

doi: 10.1103/PhysRevC.104.L051301
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Data from this article have been entered in the XUNDL database. For more information, click here.


2021MC04      Phys.Rev. C 103, 064320 (2021)

D.G.McNeel, A.H.Wuosmaa, S.A.Kuvin, J.Smith, B.B.Back, J.Chen, C.R.Hoffman, B.P.Kay, G.L.Wilson, D.K.Sharp, R.M.Clark, H.L.Crawford, P.Fallon, A.O.Macchiavelli

Configuration mixing in 28Mg and the 26Mg(t, p)28Mg

NUCLEAR REACTIONS 3H(26Mg, p)28Mg, E=160.6 MeV; 2H(26Mg, p)27Mg, E=160.6 MeV; measured reaction products, particle-identification spectra, E(p), I(p), σ(θ) using HELIOS magnetic spectrometer and auxiliary detectors at the ATLAS-ANL facility. 28Mg; deduced levels, J, π, L-transfers; calculated levels, J, π, proton- and neutron-occupation numbers for selected states in 28Mg using shell model with SDPF-MU interaction. DWBA analysis of σ(θ) distributions. Comparison with previous experimental data in the ENSDF database. 2H(26Mg, p)27Mg reaction used for energy-calibration and transport-efficiency information. Relevance to sd-fp cross-shell excitations between the valley of stability and the 'island of inversion'.

doi: 10.1103/PhysRevC.103.064320
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2641. Data from this article have been entered in the XUNDL database. For more information, click here.


2021PR11      Phys.Rev. C 104, 044318 (2021)

V.S.Prasher, A.J.Mitchell, C.J.Lister, P.Chowdhury, L.Afanasieva, M.Albers, C.J.Chiara, M.P.Carpenter, D.Cline, N.D'Olympia, C.J.Guess, A.B.Hayes, C.R.Hoffman, R.V.F.Janssens, B.P.Kay, T.L.Khoo, A.Korichi, T.Lauritsen, E.Merchan, Y.Qiu, D.Seweryniak, R.Shearman, S.K.Tandel, A.Verras, C.Y.Wu, S.Zhu

Shapes, softness, and nonyrast collectivity in 186W

NUCLEAR REACTIONS 186W(136Xe, 136Xe')186W, E=725, 800 MeV from ATLAS-ANL facility; measured scattered beam- and target-like ions using Rochester-Livermore 4π CHICO2 array, Eγ, Iγ, γγ- and (particle)γ-coin, gγ(θ)(DCO) using Gammasphere array. 186W; deduced high-spin levels, J, π, Kπ, multipolarities, rotational bands, odd-even staggering parameters S(J) for bands and compared with predictions for an axially symmetric rotor, a rigid asymmetric rotor and a γ-unstable nucleus, B(E1) ratios. Systematics of E(first 2+), E(first 4+)/E(first 2+), E(second 2+)/E(first 2+), E(second 0+)/E(first 2+) for A=178-188 even-A W isotopes, and staggering parameters for 178,180,182,184,186,188W, 178,180Hf, 188Os.

doi: 10.1103/PhysRevC.104.044318
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Data from this article have been entered in the XUNDL database. For more information, click here.


2021SZ03      Phys.Rev. C 104, 054308 (2021)

S.V.Szwec, D.K.Sharp, B.P.Kay, S.J.Freeman, J.P.Schiffer, P.Adsley, C.Binnersley, N.de Sereville, T.Faestermann, R.F.Garcia Ruiz, F.Hammache, R.Hertenberger, A.Meyer, C.Portail, I.Stefan, A.Vernon, S.Wilkins, H.-F.Wirth

Neutron occupancies and single-particle energies across the stable tin isotopes

NUCLEAR REACTIONS 112,114,116,118,120,122,124Sn(p, d)111Sn/113Sn/115Sn/117Sn/119Sn/121Sn/123Sn, E=21 MeV; 112,114,116,118,120,122,124Sn(3He, α)111Sn/113Sn/115Sn/117Sn/119Sn/121Sn/123Sn, E=36 MeV; 112,114,116,118,120,122,124Sn(d, p)113Sn/115Sn/117Sn/119Sn/121Sn/123Sn/125Sn, E=15 MeV; 112,114,116,118,120,122,124Sn(α, 3He)113Sn/115Sn/117Sn/119Sn/121Sn/123Sn/125Sn, E=41 MeV; measured E(d), I(d), Eα, Iα, E(p), I(p), E(3He), I(3He), differential σ(θ) and analyzed by DWBA calculations; analyzed proton, deuteron, 3He and α spectra using Munich Q3D spectrometer at MLL accelerator facility for (p, d) and (d, p) reactions, and Enge split-pole spectrometer for (3He, α), (α, 3He) reactions at the IJClab of Tandem-Alto facility of Laboratoire de Physique. 112,114,116,118,120,122,124Sn; deduced levels, J, π, L-transfers, spectroscopic factors, summed neutron strengths, fractional occupancies and effective single-particle energies for 2s1/2, 1d3/2, 1d5/2, 0g7/2, and 0h11/2 neutron orbitals. Detailed cross sections at different angles, particle spectra, absolute cross sections and spectroscopic factors are given in the Supplemental Material of the paper.

doi: 10.1103/PhysRevC.104.054308
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2550.


2020HO05      Phys.Rev. C 101, 034309 (2020)

A.M.Howard, S.J.Freeman, D.K.Sharp, T.Bloxham, J.A.Clark, C.M.Deibel, B.P.Kay, P.D.Parker, J.P.Schiffer, J.S.Thomas

Neutron-hole strength in N=81 nuclei

NUCLEAR REACTIONS 138Ba, 140Ce, 142Nd, 144Sm(p, d), E=23 MeV; 138Ba, 140Ce, 142Nd, 144Sm(3He, α), E=34 MeV; measured Ed, Id, Eα, Iα, σ(θ) using the Enge split-pole spectrograph and multi-wire gas proportional counter backed by plastic scintillator at the tandem Van de Graaff accelerator of Yale University. 137Ba, 139Ce, 141Nd, 143Sm; deduced levels, J, π, L-transfer, configurations, spectroscopic factors, proton occupancies, neutron hole strengths and centroids, summed strengths. DWBA analysis. Comparison with predictions of particle-vibration coupling calculations.

doi: 10.1103/PhysRevC.101.034309
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020SA44      Phys.Rev. C 102, 064317 (2020)

M.Salathe, H.L.Crawford, A.O.Macchiavelli, B.P.Kay, C.R.Hoffman, A.D.Ayangeakaa, C.M.Campbell, R.M.Clark, M.Cromaz, P.Fallon, M.D.Jones, S.A.Kuvin, J.Sethi, M.Wiedeking, J.R.Winkelbauer, A.H.Wuosmaa

Search for the 1/2+ intruder state in 35P

NUCLEAR REACTIONS 2H(36S, 3He), E=15.3 MeV/nucleon; measured E(3He), I(3He), σ(θ) using deuterated-plastic targets and HELIOS solenoidal spectrometer at the ATLAS-ANL facility. 35P; deduced levels, J, π, spectroscopic factors, configurations, 0p0h waveform amplitude of the 36S ground state, no candidate peak for 2p2h bandhead and a deformed intruder state in 35P. Angular distribution data analyzed using PTOLEMY DWBA calculations with possible combinations of optical potentials. Comparison with previous experimental results. Systematics of experimental and shell model results for energies of 2p2h bandheads for the N=20 isotones: 32Mg, 33Al, 34Si, 35P, 36S.

doi: 10.1103/PhysRevC.102.064317
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020TA03      Phys.Rev.Lett. 124, 062502 (2020)

T.L.Tang, B.P.Kay, C.R.Hoffman, J.P.Schiffer, D.K.Sharp, L.P.Gaffney, S.J.Freeman, M.R.Mumpower, A.Arokiaraj, E.F.Baader, P.A.Butler, W.N.Catford, G.de Angelis, F.Flavigny, M.D.Gott, E.T.Gregor, J.Konki, M.Labiche, I.H.Lazarus, P.T.MacGregor, I.Martel, R.D.Page, Zs.Podolyak, O.Poleshchuk, R.Raabe, F.Recchia, J.F.Smith, S.V.Szwec, J.Yang

First Exploration of Neutron Shell Structure below Lead and beyond N=126

NUCLEAR REACTIONS 2H(206Hg, p), E=7.38 MeV/nucleon; measured reaction products, Ep, Ip. 207Hg; deduced excitation energies, J, π, σ(θ). Comparison with theoretical calculations.

doi: 10.1103/physrevlett.124.062502
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Data from this article have been entered in the XUNDL database. For more information, click here.


2019CH51      Phys.Rev. C 100, 064314 (2019)

J.Chen, K.Auranen, M.L.Avila, B.B.Back, M.A.Caprio, C.R.Hoffman, D.Gorelov, B.P.Kay, S.A.Kuvin, Q.Liu, J.L.Lou, A.O.Macchiavelli, D.G.McNeel, T.L.Tang, D.Santiago-Gonzalez, R.Talwar, J.Wu, G.Wilson, R.B.Wiringa, Y.L.Ye, C.X.Yuan, H.L.Zang

Experimental study of the low-lying negative-parity states in 11Be using the 12B (d, 3He) 11Be reaction

NUCLEAR REACTIONS 2H(12B, 3He)11Be, (12B, 12B'), E=12 MeV/nucleon, [secondary 12Be beam from 2H(11B, 12B), E=13.5 MeV/nucleon primary reaction]; measured reaction products, E(3He), I(3He), (3He)(11Be)- and (3He)(10Be)-coin, σ(θ) using the HELical Orbit Spectrometer (HELIOS) at the ATLAS In-Flight facility at ANL. Deuterated polyethylene (CD2)n target. 11Be; deduced levels, l-transfers, configurations, spectroscopic factors. Distorted wave Born approximation (DWBA) analysis. Comparison with previous experimental data, and with results from variational Monte Carlo and no-core shell-model calculations. Comparison with 11B(d, 3He)10Be experimental data.

doi: 10.1103/PhysRevC.100.064314
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2438. Data from this article have been entered in the XUNDL database. For more information, click here.


2018AS03      Nucl.Instrum.Methods Phys.Res. A899, 6 (2018)

B.W.Asher, S.Almaraz-Calderon, O.Nusair, K.E.Rehm, M.L.Avila, A.A.Chen, C.A.Dickerson, C.L.Jiang, B.P.Kay, R.C.Pardo, D.Santiago-Gonzalez, R.Talwar

Development of an Isomeric beam of 26Al for nuclear reaction studies

NUCLEAR REACTIONS 1H(26Mg, 26Al), E=158.5 MeV; measured reaction products, Eγ, Iγ. 26mAl; deduced σ. Comparison with available data.

doi: 10.1016/j.nima.2018.05.015
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2018CH36      Phys.Rev. C 98, 014325 (2018)

J.Chen, C.R.Hoffman, T.Ahn, K.Auranen, M.L.Avila, B.B.Back, D.W.Bardayan, D.Blankstein, P.Copp, D.Gorelov, B.P.Kay, S.A.Kuvin, J.P.Lai, D.G.McNeel, P.D.O'Malley, A.M.Rogers, D.Santiago-Gonzalez, J.P.Schiffer, J.Sethi, R.Talwar, J.R.Winkelbauer

Experimental study of the effective nucleon-nucleon interaction using the 21F(d, p)22F reaction

NUCLEAR REACTIONS 2H(21F, p), E=10 MeV/nucleon, [21F secondary beam from 9Be(22Ne, 21F), E=11 MeV/nucleon primary reaction using ATLAS-ANL facility]; measured Ep, Ip, 22Fe recoils, (22F)p-coin, and σ(θ) using HELIcal Orbit Spectrometer (HELIOS). 22F; deduced levels, J, π, spectroscopic factors and strengths, energy centroids and diagonal particle-hole two-body matrix elements (TBMEs) as function of angular momentum, N=14, 16 shell gaps. Distorted wave Born approximation (DWBA) method for theoretical σ(θ) calculations. Comparison with theoretical spectroscopic strengths by shell-model calculation using the USDA and USDB interactions.

doi: 10.1103/PhysRevC.98.014325
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2018FO11      Phys.Rev.Lett. 120, 212501 (2018)

A.M.Forney, W.B.Walters, C.J.Chiara, R.V.F.Janssens, A.D.Ayangeakaa, J.Sethi, J.Harker, M.Alcorta, M.P.Carpenter, G.Gurdal, C.R.Hoffman, B.P.Kay, F.G.Kondev, T.Lauritsen, C.J.Lister, E.A.McCutchan, A.M.Rogers, D.Seweryniak, I.Stefanescu, S.Zhu

Novel ΔJ = 1 Sequence in 78Ge: Possible Evidence for Triaxiality

NUCLEAR REACTIONS 238U(76Ge, X)78Ge, E=530 MeV; 198Pt, 208Pb(76Ge, X)78Ge, E=450 MeV; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, B(E2). Comparison with available data and calculations.

doi: 10.1103/PhysRevLett.120.212501
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2018JI01      Phys.Rev. C 97, 012801 (2018)

C.L.Jiang, D.Santiago-Gonzalez, S.Almaraz-Calderon, K.E.Rehm, B.B.Back, K.Auranen, M.L.Avila, A.D.Ayangeakaa, S.Bottoni, M.P.Carpenter, C.Dickerson, B.DiGiovine, J.P.Greene, C.R.Hoffman, R.V.F.Janssens, B.P.Kay, S.A.Kuvin, T.Lauritsen, R.C.Pardo, J.Sethi, D.Seweryniak, R.Talwar, C.Ugalde, S.Zhu, D.Bourgin, S.Courtin, F.Haas, M.Heine, G.Fruet, D.Montanari, D.G.Jenkins, L.Morris, A.Lefebvre-Schuhl, M.Alcorta, X.Fang, X.D.Tang, B.Bucher, C.M.Deibel, S.T.Marley

Reaction rate for carbon burning in massive stars

NUCLEAR REACTIONS 12C(12C, p)23Na, (12C, α)20Ne, E=5.5-10 MeV; measured Eγ, Iγ, (particle)γ-coin, σ(E) using Gammasphere array and an array of three annular double-sided silicon strip detectors at the ATLAS-ANL facility; deduced S factors and astrophysical reaction rates. Comparison with previous measurements, and with data from other reactions. Relevance to carbon burning is a critical phase for nucleosynthesis in massive stars.

doi: 10.1103/PhysRevC.97.012801
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2018SA13      Phys.Rev.Lett. 120, 122503 (2018)

D.Santiago-Gonzalez, K.Auranen, M.L.Avila, A.D.Ayangeakaa, B.B.Back, S.Bottoni, M.P.Carpenter, J.Chen, C.M.Deibel, A.A.Hood, C.R.Hoffman, R.V.F.Janssens, C.L.Jiang, B.P.Kay, S.A.Kuvin, A.Lauer, J.P.Schiffer, J.Sethi, R.Talwar, I.Wiedenhover, J.Winkelbauer, S.Zhu

Probing the Single-Particle Character of Rotational States in 19F Using a Short-Lived Isomeric Beam

NUCLEAR REACTIONS 2H(18F, p), E=14 MeV/nucleon; measured reaction products, Ep, Ip. 19F; deduced energy levels, J, π, relative spectroscopic factors, rotational band. Comparison with shell-model calculations.

doi: 10.1103/PhysRevLett.120.122503
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2018WI09      Phys.Rev. C 98, 041302 (2018)

W.Witt, V.Werner, N.Pietralla, M.Albers, A.D.Ayangeakaa, B.Bucher, M.P.Carpenter, D.Cline, H.M.David, A.Hayes, C.Hoffman, R.V.F.Janssens, B.P.Kay, F.G.Kondev, W.Korten, T.Lauritsen, O.Moller, G.Rainovski, G.Savard, D.Seweryniak, J.Smith, R.Stegmann, S.Zhu, C.Y.Wu

Sub-shell closure and shape coexistence in the transitional nucleus 98Zr

NUCLEAR REACTIONS 196Pt(98Zr, 98Zr'), E=464 MeV from CARIBU source at ATLAS-ANL facility; measured recoils, Eγ, Iγ, (recoil)γ-coin using CHICO2 array of segmented parallel-plate avalanche counter (PPAC) for recoil detection, and GRETINA array of segmented HPGe detectors for γ detection. Coulomb excitation. 98Zr; deduced levels, upper limit of B(E2) for the first 2+ state. Comparison with shell model and Monte-Carlo shell model calculations, and with previous experimental values. Systematics of B(E2) values for the first 2+ states in 90,92,94,96,98,100,102,104,106Zr.

doi: 10.1103/PhysRevC.98.041302
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2017AL29      Phys.Rev.Lett. 119, 072701 (2017)

S.Almaraz-Calderon, K.E.Rehm, N.Gerken, M.L.Avila, B.P.Kay, R.Talwar, A.D.Ayangeakaa, S.Bottoni, A.A.Chen, C.M.Deibel, C.Dickerson, K.Hanselman, C.R.Hoffman, C.L.Jiang, S.A.Kuvin, O.Nusair, R.C.Pardo, D.Santiago-Gonzalez, J.Sethi, C.Ugalde

Study of the 26Alm(d, p)27Al Reaction and the Influence of the 26Al 0+ Isomer on the Destruction of 26Al in the Galaxy

NUCLEAR REACTIONS C, 2H(26Al, p), E=120 MeV; measured reaction products, Eγ, Iγ. 26Al; deduced σ(θ), reaction rates. Comparison with available data, DWBA calculations.

doi: 10.1103/PhysRevLett.119.072701
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2017AV03      Nucl.Instrum.Methods Phys.Res. A859, 63 (2017)

M.L.Avila, K.E.Rehm, S.Almaraz-Calderon, A.D.Ayangeakaa, C.Dickerson, C.R.Hoffman, C.L.Jiang, B.P.Kay, J.Lai, O.Nusair, R.C.Pardo, D.Santiago-Gonzalez, R.Talwar, C.Ugalde

Study of (α, p) and (α, n) reactions with a Multi-Sampling Ionization Chamber

NUCLEAR REACTIONS 4He(17O, n), (17O, α'), E=34.8 MeV; 4He(23Na, α), (23Na, p), E=51.5, 57.4 MeV; measured reaction products, Eα, Iα, Ep, Ip; deduced σ. Comparison with available data.

doi: 10.1016/j.nima.2017.03.060
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2017BO23      Phys.Lett. B 775, 271 (2017)

S.Bottoni, S.Zhu, R.V.F.Janssens, M.P.Carpenter, Y.Tsunoda, T.Otsuka, A.O.Macchiavelli, D.Cline, C.Y.Wu, A.D.Ayangeakaa, B.Bucher, M.Q.Buckner, C.M.Campbell, C.J.Chiara, H.L.Crawford, M.Cromaz, H.M.David, P.Fallon, A.Gade, J.P.Greene, J.Harker, A.B.Hayes, C.R.Hoffman, B.P.Kay, A.Korichi, T.Lauritsen, J.Sethi, D.Seweryniak, W.B.Walters, D.Weisshaar, A.Wiens

Nucleon correlations and the structure of 7130Zn41

NUCLEAR REACTIONS 70Zn(48Ca, 47Ca)71Zn, E=170 MeV; 197Au(70Zn, X)71Zn, E=430 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, decay scheme, J, π, modest oblate deformation. Comparison with Monte-Carlo shell-model calculations.

doi: 10.1016/j.physletb.2017.11.003
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2017BU07      Phys.Rev.Lett. 118, 152504 (2017)

B.Bucher, S.Zhu, C.Y.Wu, R.V.F.Janssens, R.N.Bernard, L.M.Robledo, T.R.Rodriguez, D.Cline, A.B.Hayes, A.D.Ayangeakaa, M.Q.Buckner, C.M.Campbell, M.P.Carpenter, J.A.Clark, H.L.Crawford, H.M.David, C.Dickerson, J.Harker, C.R.Hoffman, B.P.Kay, F.G.Kondev, T.Lauritsen, A.O.Macchiavelli, R.C.Pardo, G.Savard, D.Seweryniak, R.Vondrasek

Direct Evidence for Octupole Deformation in 146Ba and the Origin of Large E1 Moment Variations in Reflection-Asymmetric Nuclei

NUCLEAR REACTIONS 208Pb(146Ba, 146Ba'), E=659 MeV; measured reaction products, Eγ, Iγ. 144,146,148Ba; deduced energy levels, J, π, B(Eλ), quadrupole and octupole deformation parameters. Calculated HFB potential energy surfaces, neutron single-particle energies. Coulomb excitation, comparison with available data.

doi: 10.1103/PhysRevLett.118.152504
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2017FR08      Phys.Rev. C 96, 054325 (2017)

S.J.Freeman, D.K.Sharp, S.A.McAllister, B.P.Kay, C.M.Deibel, T.Faestermann, R.Hertenberger, A.J.Mitchell, J.P.Schiffer, S.V.Szwec, J.S.Thomas, H.-F.Wirth

Experimental study of the rearrangements of valence protons and neutrons amongst single-particle orbits during double-β decay in 100Mo

NUCLEAR REACTIONS 98,100Mo, 100,102Ru(d, p), (p, d), (3He, α), (3He, d), E(d)=15 MeV, E(p)=24 MeV, E(3He)=36 MeV; measured light-ion particle spectra, cross sections, angular distributions using Q3D magnetic spectrometer at Munich MP tandem accelerator facility. Enriched targets. 97,99,101Mo, 99,101,103Ru, 99,101Tc, 101,103Rh; deduced levels, L-transfers, J, π, spectroscopic factors, cross section ratios. DWBA analysis of σ(θ) data. 98,100Mo, 100,102Ru; deduced neutron occupancies from neutron-removing reactions, and proton vacancies from (3He, d) reaction. 100Mo, 100Ru; deduced neutron occupancy and proton vacancy for the valence orbits, and compared to predictions from interacting boson model (IBM), and two different Woods-Saxon calculations. See Supplemental Material (reference 46 in the paper) for details of experimental cross section data and spectroscopic factors for individual states in final nuclei.

RADIOACTIVITY 100Mo(2β-); deduced detailed quantitative assessment of rearrangements of protons and neutrons amongst the valence single-particle orbitals during double-β decay process, with relevance to nuclear matrix element for 0νββ and 2νββ decay modes.

doi: 10.1103/PhysRevC.96.054325
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2017KA57      Phys.Rev.Lett. 119, 182502 (2017)

B.P.Kay, C.R.Hoffman, A.O.Macchiavelli

Effect of Weak Binding on the Apparent Spin-Orbit Splitting in Nuclei

NUCLEAR STRUCTURE 35Si, 37S, 39Ar, 41Ca; analyzed available data; deduced splitting between orbitals that are spin-orbit partners.

doi: 10.1103/PhysRevLett.119.182502
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2017KU24      Phys.Rev. C 96, 041301 (2017)

S.A.Kuvin, A.H.Wuosmaa, C.J.Lister, M.L.Avila, C.R.Hoffman, B.P.Kay, D.G.McNeel, C.Morse, E.A.McCutchan, D.Santiago-Gonzalez, J.R.Winkelbauer

α decay of the T = 1, 2+ state in 10B and isospin symmetry breaking in the A = 10 triplet

NUCLEAR REACTIONS 1H(10B, 10B'), E=10 MeV/nucleon; measured Ep, Ip, ΔE-E particle-identification spectra for α, 6Li and 10B particles, p(10Be)-, pα(6Li)-coin, angular distributions of the 1740-, 2154- and 3587-keV states for protons and for p(10B) coincidences, α-decay branching ratio of the 5164-keV state in 10B using HELIOS spectrometer at ATLAS-ANL facility. 10B; deduced levels, partial Γα and Γγ, B(E2) for the 5164-keV state. Comparison with B(E2) for 10Be and 10C, previous experimental results, and with ab initio Green's function Monte Carlo (GFMC) calculations using realistic three-nucleon Hamiltonians.

doi: 10.1103/PhysRevC.96.041301
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2017MA39      Phys.Rev. C 96, 014318 (2017)

D.A.Matters, F.G.Kondev, N.Aoi, Y.Ayyad, A.P.Byrne, M.P.Carpenter, J.J.Carroll, C.J.Chiara, P.M.Davidson, G.D.Dracoulis, Y.D.Fang, C.R.Hoffman, R.O.Hughes, E.Ideguchi, R.V.F.Janssens, S.Kanaya, B.P.Kay, T.Kibedi, G.J.Lane, T.Lauritsen, J.W.McClory, P.Nieminen, S.Noji, A.Odahara, H.J.Ong, A.E.Stuchbery, D.T.Tran, H.Watanabe, A.N.Wilson, Y.Yamamoto, S.Zhu

In-beam γ-ray spectroscopy studies of medium-spin states in the odd-odd nucleus 186Re

NUCLEAR REACTIONS 186W(d, 2n)186Re, E=12.5, 14.5 MeV; measured Eγ, Iγ, γγ-coin using Clover Array Gamma-Ray spectrometer for Advanced research (CAGRA) at RCNP, Osaka University, and CAESAR spectrometer at the 14UD Pelletron accelerator of the Australian National University. 186Re; deduced high-spin levels, J, π, K-shell conversion coefficients, multipolarities, bands, configurations, branching ratios and gK-gR values. Comparison with multi-quasiparticle blocking calculations.

doi: 10.1103/PhysRevC.96.014318
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2017TA21      Phys.Rev. C 96, 024310 (2017)

R.Talwar, B.P.Kay, A.J.Mitchell, S.Adachi, J.P.Entwisle, Y.Fujita, G.Gey, S.Noji, H.J.Ong, J.P.Schiffer, A.Tamii

High-j neutron excitations outside 136Xe

NUCLEAR REACTIONS 136Xe(α, 3He), E=100 MeV; measured 3He spectra and σ(θ) using Grand-Raiden (GR) magnetic spectrometer, vertical drift chambers and scintillators at RCNP-Osaka accelerator facility. Enriched 136Xe target. 137Xe; deduced levels, L-transfers, J, π, spectroscopic factors, configuration. DWBA calculations using different parametrizations of optical-model potentials. Discussed details and systematics of high-j, 9/2- and 13/2+ single-neutron excitations in N=83 isotones 135Te, 137Xe, 139Ba, 141Ce, 143Nd, 145Sm, 147Gd, 149Dy, 151Er and 153Yb, and comparison with two-level mixing model calculations.

NUCLEAR REACTIONS 144Sm(α, 3He)145Sm, E=100 MeV; measured reaction products; deduced absolute σ, σ(θ), outgoing 3He spectra, excitation energies, mixing matrix elements parameters, normalized spectroscopic factors.

doi: 10.1103/PhysRevC.96.024310
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2016AV06      Phys.Rev. C 94, 065804 (2016)

M.L.Avila, K.E.Rehm, S.Almaraz-Calderon, A.D.Ayangeakaa, C.Dickerson, C.R.Hoffman, C.L.Jiang, B.P.Kay, J.Lai, O.Nusair, R.C.Pardo, D.Santiago-Gonzalez, R.Talwar, C.Ugalde

Experimental study of the astrophysically important 23Na(α, p)26Mg and 23Na(α, n)26Al reactions

NUCLEAR REACTIONS 4He(23Na, p), (23Na, n), E=51.5, 57.4 MeV; measured particle spectra, and cross section using multisampling ionization chamber (MUSIC) detector at ATLAS-ANL facility. Comparison with previous measurements, NACRE compilation, and with statistical-model calculations. Technique to measure simultaneously excitation functions of angle- and excitation energy-integrated cross sections of (α, p) and (α, n) reactions. Relevance to 26Al production in massive stars.

doi: 10.1103/PhysRevC.94.065804
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2016AY01      Phys.Lett. B 754, 254 (2016)

A.D.Ayangeakaa, R.V.F.Janssens, C.Y.Wu, J.M.Allmond, J.L.Wood, S.Zhu, M.Albers, S.Almaraz-Calderon, B.Bucher, M.P.Carpenter, C.J.Chiara, D.Cline, H.L.Crawford, H.M.David, J.Harker, A.B.Hayes, C.R.Hoffman, B.P.Kay, K.Kolos, A.Korichi, T.Lauritsen, A.O.Macchiavelli, A.Richard, D.Seweryniak, A.Wiens

Shape coexistence and the role of axial asymmetry in 72Ge

NUCLEAR REACTIONS 208Pb(72Ge, 72Ge'), E=301 MeV; measured reaction products, Eγ, Iγ. 72Ge; deduced energy levels, J, π, reduced E2 matrix elements, B(E2) values. Comparison with available data.

doi: 10.1016/j.physletb.2016.01.036
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2016BA04      Phys.Rev. C 93, 014313 (2016)

T.Baugher, A.Gade, R.V.F.Janssens, S.M.Lenzi, D.Bazin, M.P.Carpenter, C.J.Chiara, A.N.Deacon, S.J.Freeman, G.F.Grinyer, C.R.Hoffman, B.P.Kay, F.G.Kondev, T.Lauritsen, E.M.Lunderberg, S.McDaniel, K.C.Meierbachtol, A.Ratkiewicz, S.R.Stroberg, K.A.Walsh, D.Weisshaar, S.Zhu

In-beam γ spectroscopy of 63Mn

NUCLEAR REACTIONS 9Be(63Mn, 63Mn'), E=84 meV/nucleon, [secondary 63Mn from 9Be(76Ge, X), E=130 MeV/nucleon primary reaction]; measured Eγ, Iγ, (63Mn)γ-, γγ-coin, level half-lives by Doppler line-shape analysis using SeGA and GRETINA arrays for γ detection, A1900 fragment separator and S-800 spectrograph at NSCL-MSU accelerator facility; recreated Doppler-corrected γ spectra. 63Mn; deduced levels, J, π, B(M1), B(E2). Comparison with large-scale shell-model calculations using different model spaces and effective interactions. Systematics of 59,61,63Mn level structures.

doi: 10.1103/PhysRevC.93.014313
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2016BU02      Phys.Rev.Lett. 116, 112503 (2016)

B.Bucher, S.Zhu, C.Y.Wu, R.V.F.Janssens, D.Cline, A.B.Hayes, M.Albers, A.D.Ayangeakaa, P.A.Butler, C.M.Campbell, M.P.Carpenter, C.J.Chiara, J.A.Clark, H.L.Crawford, M.Cromaz, H.M.David, C.Dickerson, E.T.Gregor, J.Harker, C.R.Hoffman, B.P.Kay, F.G.Kondev, A.Korichi, T.Lauritsen, A.O.Macchiavelli, R.C.Pardo, A.Richard, M.A.Riley, G.Savard, M.Scheck, D.Seweryniak, M.K.Smith, R.Vondrasek, A.Wiens

Direct Evidence of Octupole Deformation in Neutron-Rich 144Ba

NUCLEAR REACTIONS 208Pb(144Ba, 144Ba'), E=650 MeV; measured reaction products, Eγ, Iγ. 144Ba; deduced yields, E2 and E3 matrix elements, quadrupole moments, deformation parameters, B(E2), B(E3). Comparison with theoretical calculations.

doi: 10.1103/PhysRevLett.116.112503
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2016EN04      Phys.Rev. C 93, 064312 (2016)

J.P.Entwisle, B.P.Kay, A.Tamii, S.Adachi, N.Aoi, J.A.Clark, S.J.Freeman, H.Fujita, Y.Fujita, T.Furuno, T.Hashimoto, C.R.Hoffman, E.Ideguchi, T.Ito, C.Iwamoto, T.Kawabata, B.Liu, M.Miura, H.J.Ong, J.P.Schiffer, D.K.Sharp, G.Susoy, T.Suzuki, S.V.Szwec, M.Takaki, M.Tsumura, T.Yamamoto

Change of nuclear configurations in the neutrinoless double-β decay of 130Te → 130Xe and 136Xe → 136Ba

NUCLEAR REACTIONS 128,130Te, 130,132,134,136Xe, 136,138Ba(d, 3He), E=101 MeV; measured Ed, Id, σ(θ) using Grand Raiden (GR) spectrometer at RCNP-Osaka cyclotron facility. 127,129Sb, 129,131,133,135I, 135,137Cs; deduced levels, L-transfers, spectroscopic factors. DWBA and optical model analysis. 128,130Te, 130,132,134,136Xe, 136,138Ba; deduced ground state proton occupancies. Comparison with shell-model and interacting boson-model calculations.

RADIOACTIVITY 130Te, 136Xe(2β-); deduced change in the configuration of valence protons between the initial and final states in the 0νββ decay mode from measurements of the cross sections in (d, 3He) reaction, nuclear matrix elements.

doi: 10.1103/PhysRevC.93.064312
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2016HO13      Phys.Rev. C 94, 021303 (2016)

S.S.Hota, S.K.Tandel, P.Chowdhury, I.Ahmad, M.P.Carpenter, C.J.Chiara, J.P.Greene, C.R.Hoffman, E.G.Jackson, R.V.F.Janssens, B.P.Kay, T.L.Khoo, F.G.Kondev, S.Lakshmi, S.Lalkovski, T.Lauritsen, C.J.Lister, E.A.McCutchan, K.Moran, D.Peterson, U.Shirwadkar, D.Seweryniak, I.Stefanescu, Y.Toh, S.Zhu

Population and decay of a Kπ = 8- two-quasineutron isomer in 244Pu

NUCLEAR REACTIONS 244Pu(208Pb, 208Pb'), E=1430 MeV; 244Pu(47Ti, 47TI'), E=305 MeV; measured Eγ, Iγ, γγ-coin, M1/E2 branching ratios, prompt and off-beam γ rays, half-life of a 2-qp 8- isomer using Gammasphere array at ATLAS-ANL. 244Pu; deduced high-spin levels, J, π, rotational bands, multipolarity, configurations, kinematic and dynamic moments of inertia, (gk-gR)/Q0, reduced hindrance factors for transitions from the isomer. Comparison with multi-qp calculations using Woods-Saxon potential and Lipkin-Nogami pairing. Systematics of moment of inertia plots and 8- isomers for 244Pu, 250Fm and 252No.

doi: 10.1103/PhysRevC.94.021303
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2016HO14      Phys.Rev. C 94, 024330 (2016)

C.R.Hoffman, B.P.Kay, J.P.Schiffer

Ordering of the 0d5/2 and 1s1/2 proton levels in light nuclei

NUCLEAR STRUCTURE 9B, 11,12,13,14N, 14,15O, 15,16,17F; 9,11Be, 12B, 13,14,15C, 14,15,16N, 17O; calculated 1/2+ and 5/2+ proton and neutron single-particle excitations, and compared with experimental data; deduced ordering of the 0d5/2 and 1s1/2 proton orbitals. Woods-Saxon potential calculations.

doi: 10.1103/PhysRevC.94.024330
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2016SZ03      Phys.Rev. C 94, 054314 (2016)

S.V.Szwec, B.P.Kay, T.E.Cocolios, J.P.Entwisle, S.J.Freeman, L.P.Gaffney, V.Guimaraes, F.Hammache, P.P.McKee, E.Parr, C.Portail, J.P.Schiffer, N.de Sereville, D.K.Sharp, J.F.Smith, I.Stefan

Rearrangement of valence neutrons in the neutrinoless double-β decay of 136Xe

NUCLEAR REACTIONS 134Ba(d, p), E=15 MeV; 134Ba(α, 3He), E=40.1 MeV; 136Ba(p, d), E=23 MeV; 134Ba(3He, α), E=32.0 MeV; measured outgoing proton, deuteron, 3He and α spectra, σ(θ) using an Enge split-pole spectrometer at the ALTO Tandem accelerator at IPN-Orsay. DWBA analysis using PTOLEMY code. 135Ba; deduced levels, J, π. 136Xe, 134,136Ba; deduced ground-state neutron occupancies. Comparisons with theoretical calculations using various nuclear-structure models. Relevance to initial and final state in the 0νββ decay mode of 136Xe.

doi: 10.1103/PhysRevC.94.054314
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2014HE12      Phys.Rev. C 89, 064307 (2014)

J.Henderson, D.G.Jenkins, P.J.Davies, M.Alcorta, M.P.Carpenter, B.P.Kay, C.J.Lister, S.Zhu

Upper limit on the two-photon emission branch for the 0+2 → 0+1 transition in 98Mo

NUCLEAR REACTIONS 98Mo(p, p'), E=6.7 MeV; measured Eγ, Iγ, E(p), I(p), ce, γγ-, pγ-coin, branching ratio for two-photon emission from excited 0+ to g.s. E0 transition using Gammasphere array at ATLAS-ANL facility. 98Mo; deduced level, upper limit of two-photon emission branch from excited 0+. Comparison with previous experimental results for E0 transitions in 16O, 40Ca, 90Zr, and with estimate branching ratio from systematics.

doi: 10.1103/PhysRevC.89.064307
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2014HE32      Phys.Rev.Lett. 113, 262505 (2014)

G.Henning, T.L.Khoo, A.Lopez-Martens, D.Seweryniak, M.Alcorta, M.Asai, B.B.Back, P.F.Bertone, D.Boilley, M.P.Carpenter, C.J.Chiara, P.Chowdhury, B.Gall, P.T.Greenlees, G.Gurdal, K.Hauschild, A.Heinz, C.R.Hoffman, R.V.F.Janssens, A.V.Karpov, B.P.Kay, F.G.Kondev, S.Lakshmi, T.Lauritsen, C.J.Lister, E.A.McCutchan, C.Nair, J.Piot, D.Potterveld, P.Reiter, A.M.Rogers, N.Rowley, S.Zhu

Fission Barrier of Superheavy Nuclei and Persistence of Shell Effects at High Spin: Cases of 254No and 220Th

NUCLEAR REACTIONS 208Pb(48Ca, 2n), E=217, 220.5 MeV; 176Yb(48Ca, 4n), E=219 MeV; measured reaction products, Eγ, Iγ; deduced fission barrier heights. Comparisons with theoretical fission barriers test theories that predict properties of superheavy elements.

doi: 10.1103/PhysRevLett.113.262505
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2014HO08      Phys.Rev. C 89, 061305 (2014)

C.R.Hoffman, B.P.Kay, J.P.Schiffer

Neutron s states in loosely bound nuclei

NUCLEAR STRUCTURE 9He, 9,11,13Be, 12,14B, 13,14,15,16C, 14,15,16N, 17O; analyzed and reviewed S(n), energies of 1/2+ and 5/2+ states to explore behavior of neutron s states near thresholds with simple Woods-Saxon potentials; deduced effect of lingering of neutron s states just below threshold on increases in radii of the neutron density distributions, and neutron halos in nuclei in different mass regions.

doi: 10.1103/PhysRevC.89.061305
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2013HO21      Phys.Rev. C 88, 044317 (2013)

C.R.Hoffman, M.Albers, M.Alcorta, S.Almaraz-Calderon, B.B.Back, S.I.Baker, S.Bedoor, P.F.Bertone, B.P.Kay, J.C.Lighthall, T.Palchan, R.C.Pardo, G.Perdikakis, K.E.Rehm, A.M.Rogers, D.Santiago-Gonzalez, C.Yuan, J.P.Schiffer

Single-neutron excitations in 18N

NUCLEAR REACTIONS 2H(17N, p), [17N secondary beam from 9Be(18O, X), E=14.7 MeV/nucleon primary reaction], E=13.6 MeV/nucleon; measured E(p), I(p), σ(θ) using HELIOS spectrometer and array at ATLAS-ANL facility. 18N; deduced levels, J, π, l-transfer, spectroscopic factors, spectroscopic strengths, configuration. DWBA analysis of σ(θ) data for (d, p) reaction in inverse kinematics. 17C, 18N, 19O; systematics of low-lying states in N=11 isotones, and comparison with shell-model calculations.

doi: 10.1103/PhysRevC.88.044317
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2013KA04      Phys.Rev. C 87, 011302 (2013)

B.P.Kay, T.Bloxham, S.A.McAllister, J.A.Clark, C.M.Deibel, S.J.Freedman, S.J.Freeman, K.Han, A.M.Howard, A.J.Mitchell, P.D.Parker, J.P.Schiffer, D.K.Sharp, J.S.Thomas

Valence neutron properties relevant to the neutrinoless double-β decay of 130Te

NUCLEAR REACTIONS 128,130Te(p, d), E=23 MeV; 128,130Te, 130,132Xe(d, p), E=15 MeV; 128,130Te, 130,132Xe(α, 3He), E=50 MeV; 130Te(3He, α), E=40 MeV; 132Xe(p, t), E=23 MeV; measured deuteron, proton, triton, 3He, α spectra, σ(θ) using Enge-split pole magnetic spectrograph at Yale Tandem accelerator facility. 127,129,131Te, 130,131,133Xe; deduced levels, J, π, L-transfers. 128,130Te, 130,132Xe; deduced neutron vacancies for active orbitals. Comparison with calculations within both the quasiparticle random-phase approximation and shell-model frameworks. Discussed relevance to neutrinoless double β decay of 130Te.

doi: 10.1103/PhysRevC.87.011302
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2013KA14      Acta Phys.Pol. B44, 349 (2013)

B.P.Kay, M.Alcorta, B.B.Back, S.Bedoor, P.F.Bertone, S.I.Baker, J.A.Clark, C.M.Deibel, B.J.DiGiovine, S.J.Freeman, C.R.Hoffman, H.Y.Lee, J.C.Lighthall, A.Macchiavelli, S.T.Marley, P.Muller, R.Pardo, K.E.Rehm, A.Rojas, A.M.Rogers, J.Rohrer, D.Santiago-Gonzalez, J.P.Schiffer, D.K.Sharp, D.V.Shetty, J.S.Thomas, I.Wiedenhover, A.H.Wuosmaa

Transfer Reactions and the Structure of Neutron-rich Nuclei

doi: 10.5506/APhysPolB.44.349
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2013KA36      Phys.Rev.Lett. 111, 042502 (2013)

B.P.Kay, J.P.Schiffer, S.J.Freeman

Quenching of Cross Sections in Nucleon Transfer Reactions

doi: 10.1103/PhysRevLett.111.042502
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2013RO10      Phys.Rev. C 87, 051305 (2013)

A.Roberts, A.M.Howard, J.J.Kolata, A.N.Villano, F.D.Becchetti, P.A.DeYoung, M.Febbraro, S.J.Freeman, B.P.Kay, S.A.McAllister, A.J.Mitchell, J.P.Schiffer, J.S.Thomas, R.O.Torres-Isea

Proton pair correlations and the neutrinoless double-β decay of 76Ge

NUCLEAR REACTIONS 74,76Ge(3He, n), E=16 MeV; measured E(n), I(n), time-of-flight, σ(θ) for g.s. and first 2+ state using the Neutron Wall at Notre Dame. 76,78Se; deduced levels, proton pair correlations. DWBA analysis. Comparison with quasiparticle random phase approximation (QRPA) model calculations. Relevance to matrix elements for 0νββ decay of 76Ge. Systematics of ground-state cross sections on fpg-shell nuclei of A=60-90, and comparison with theoretical models. No evidence for the breaking of the BCS approximation for paired protons.

doi: 10.1103/PhysRevC.87.051305
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2013SC06      Phys.Rev. C 87, 034306 (2013)

J.P.Schiffer, C.R.Hoffman, B.P.Kay, J.A.Clark, C.M.Deibel, S.J.Freeman, M.Honma, A.M.Howard, A.J.Mitchell, T.Otsuka, P.D.Parker, D.K.Sharp, J.S.Thomas

Valence nucleon populations in the Ni isotopes

NUCLEAR REACTIONS 58,60,62,64Ni(d, p), E=10 MeV; 58,60,62,64Ni(α, 3He), (α, t), E=38 MeV; 58,60,62,64Ni(p, d), E=28 MeV; 58,60,62,64Ni(3He, d), E=18 MeV; 58,60,62,64Ni(3He, α), E=25 MeV; measured proton, deuteron, triton, 3He, α spectra, σ(θ) using Enge-split pole magnetic spectrograph at Yale tandem accelerator facility. 57,59,61,63,65Ni, 59,61,63,65Cu; deduced levels, J, π, l-transfers, spectroscopic factors. DWBA analysis. 58,60,62,64Ni; deduced neutron occupancies, proton vacancies, energy centroids of the neutron, neutron-hole, and proton single-particle excitations. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.87.034306
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2013SH02      Phys.Rev. C 87, 014312 (2013)

D.K.Sharp, B.P.Kay, J.S.Thomas, S.J.Freeman, J.P.Schiffer, B.B.Back, S.Bedoor, T.Bloxham, J.A.Clark, C.M.Deibel, C.R.Hoffman, A.M.Howard, J.C.Lighthall, S.T.Marley, A.J.Mitchell, T.Otsuka, P.D.Parker, K.E.Rehm, D.V.Shetty, A.H.Wuosmaa

Neutron single-particle strength outside the N=50 core

NUCLEAR REACTIONS 88Sr, 90Zr, 92Mo(d, p), E=15 MeV; 88Sr, 90Zr, 92Mo(α, 3He), E=50 MeV; measured proton and 3He spectra, σ(θ) using Enge-split pole magnetic spectrograph at Yale. 2H(86Kr, p), E=10 MeV/nucleon; measured proton spectra, σ(θ) using HELIOS spectrometer at ANL. 87Kr, 89Sr, 91Zr, 93Mo; deduced levels, J, π, absolute σ, L-transfers, spectroscopic factors, centroids of single-particle strengths. DWBA analysis.

doi: 10.1103/PhysRevC.87.014312
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2013TO05      Phys.Rev. C 87, 041304 (2013)

Y.Toh, C.J.Chiara, E.A.McCutchan, W.B.Walters, R.V.F.Janssens, M.P.Carpenter, S.Zhu, R.Broda, B.Fornal, B.P.Kay, F.G.Kondev, W.Krolas, T.Lauritsen, C.J.Lister, T.Pawlat, D.Seweryniak, I.Stefanescu, N.J.Stone, J.Wrzesinski, K.Higashiyama, N.Yoshinaga

Evidence for rigid triaxial deformation at low energy in 76Ge

NUCLEAR REACTIONS 238U(76Ge, 76Ge'), E=530 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ) using Gammasphere array at ATLAS facility in ANL. 76Ge; deduced high-spin levels, bands, multipolarity, mixing ratios, J, π, B(E2), staggering. Comparison with collective- and shell-model calculations. Evidence of rigid triaxial deformation in the low-lying states of 76Ge. Systematics of staggering parameter for γ bands in 74,76,78Se, 76Ge, 76,78,80Kr nuclei.

doi: 10.1103/PhysRevC.87.041304
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2012CH09      Phys.Rev. C 85, 024309 (2012)

C.J.Chiara, I.Stefanescu, W.B.Walters, S.Zhu, R.V.F.Janssens, M.P.Carpenter, R.Broda, B.Fornal, A.A.Hecht, N.Hoteling, E.G.Jackson, B.P.Kay, W.Krolas, T.Lauritsen, E.A.McCutchan, T.Pawlat, D.Seweryniak, X.Wang, A.Wohr, J.Wrzesinski

Core-coupled protons, F7/2 intruder states, and competing G9/2 proton and neutron structures in 65, 67Cu

NUCLEAR REACTIONS 238U(64Ni, X)65Cu/67Cu, E=430 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), γγ(θ) using Gammasphere array and ATLAS facility at ANL. 65,67Cu; deduced levels, J, π, multipolarity, mixing ratios, configurations. Systematics of 7/2- and positive-parity states in A=57-71 Cu isotopes, and 2+ and 5- states in A=56-70 Ni isotopes. Systematics of ground-state bands in 60,66,68,70Zn and compared with those of f7/2- proton bands in 59,65,67,69Cu. Comparison with shell model calculations using JUN45 and jj44b interactions.

doi: 10.1103/PhysRevC.85.024309
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2012CI05      Phys.Rev. C 86, 054322 (2012)

N.Cieplicka, K.H.Maier, B.Fornal, B.Szpak, R.V.F.Janssens, M.Alcorta, R.Broda, M.P.Carpenter, C.J.Chiara, C.R.Hoffman, B.P.Kay, F.G.Kondev, W.Krolas, T.Lauritsen, C.J.Lister, E.A.McCutchan, T.Pawlat, A.M.Rogers, D.Seweryniak, N.Sharp, W.B.Walters, J.Wrzesinski, S.Zhu

Yrast structure of 206Bi: Isomeric states and one-proton-particle, three-neutron-hole excitations

NUCLEAR REACTIONS 208Pb(76Ge, X), E=450 MeV; measured Eγ, Iγ, γ(θ), γγ-coin. 206Bi; deduced levels, J, π, T1/2, multipolarity, mixing ratio, configurations. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.86.054322
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2012HO11      Phys.Rev. C 85, 054318 (2012)

C.R.Hoffman, B.B.Back, B.P.Kay, J.P.Schiffer, M.Alcorta, S.I.Baker, S.Bedoor, P.F.Bertone, J.A.Clark, C.M.Deibel, B.DiGiovine, S.J.Freeman, J.P.Greene, J.C.Lighthall, S.T.Marley, R.C.Pardo, K.E.Rehm, A.Rojas, D.Santiago-Gonzalez, D.K.Sharp, D.V.Shetty, J.S.Thomas, I.Wiedenhover, A.H.Wuosmaa

Experimental study of the 19O(d, p)20O reaction in inverse kinematics

NUCLEAR REACTIONS 2H(19O, p), [19O secondary beam from 2H(18O, 19O), E=8.06 MeV/nucleon primary reaction], E=6.61 MeV/nucleon; measured E(p), I(p), 19,20O spectra, (recoils)p-coin, energy loss, cross sections, proton yields, σ(θ) using HELIOS spectrometer at Atlas facility. 20O; deduced levels, L-transfers, J, π, spectroscopic factors, T=1 diagonal two-body matrix elements. DWBA analysis. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.85.054318
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2012HO26      J.Phys.:Conf.Ser. 381, 012098 (2012)

A.M.Howard, S.J.Freeman, J.P.Schiffer, T.Bloxham, J.A.Clark, C.M.Deibel, B.P.Kay, P.D.Parker, D.K.Sharp, J.S.Thomas

Neutron-hole strength in the N = 81 isotone

NUCLEAR REACTIONS 138Ba, 140Ce, 142Nd, 144Sm(p, d), E=23 MeV;138Ba, 140Ce, 142Nd, 144Sm(3He, α), E=34 MeV; measured light reaction products E(particle), I(particle, θ) using Enge split-pole spectrograph, position-sensitive IC and scintillator; deduced σ(θ), spectroscopic strength for specified angular momentum transfers, single-particle binding energy.

doi: 10.1088/1742-6596/381/1/012098
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2012KA44      J.Phys.:Conf.Ser. 381, 012095 (2012)

B.P.Kay, M.Alcorta, B.B.Back, S.I.Baker, S.Bedoor, T.Bloxham, J.A.Clark, C.M.Deibel, S.J.Freeman, C.R.Hoffman, A.M.Howard, J.C.Lighthall, S.T.Marley, A.J.Mitchell, K.E.Rehm, J.P.Schiffer, D.K.Sharp, D.V.Shetty, J.S.Thomas, A.H.Wuosmaa, S.Zhu

HELIOS - progress and possibilities

doi: 10.1088/1742-6596/381/1/012095
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2012MC06      J.Phys.:Conf.Ser. 381, 012043 (2012)

S.A.McAllister, B.P.Kay, S.J.Freeman, J.P.Schiffer, C.M.Diebel, T.Bloxham, A.M.Howard, P.D.Parker, D.K.Sharp, J.S.Thomas

Constraining neutrinoless double β decay matrix elements in 130Te

NUCLEAR REACTIONS 128,130Te(p, t), E=23 MeV;128,130Te(d, p), (α, α'), E=15 MeV; 128,130Te(3He, α), E=40 MeV;128,130Te(α, 3He), E=50 MeV; measured reaction products at specified (forward) angles; deduced (d, p) spectroscopic factors. Preliminary. Other reactions under analysis.

doi: 10.1088/1742-6596/381/1/012043
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2012MI26      J.Phys.:Conf.Ser. 381, 012099 (2012)

A.J.Mitchell, S.J.Freeman, J.P.Schiffer, J.A.Clark, C.M.Deibel, C.R.Hoffman, A.M.Howard, B.P.Kay, P.D.Parker, D.K.Sharp, J.S.Thomas

Investigating trends in proton single-particle states in Z = 51 isotopes using transfer reactions

NUCLEAR REACTIONS 112,114,116,118,120,122,124Sn(α, t), E=37.5 MeV;112,114,116,118,120,122,124Sn(3He, d), E=25 MeV; measured E(particle), I(particle, θ) using Enge split-pole spectrometer; calculated σ(θ) using DWBA; deduced spectroscopic factors, σ(θ) for specified l-transfer, occupancies of neutron orbitals. Occupation of h11/2 increases rapidly with N. Preliminary.

doi: 10.1088/1742-6596/381/1/012099
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2012SC01      Phys.Rev.Lett. 108, 022501 (2012)

J.P.Schiffer, C.R.Hoffman, B.P.Kay, J.A.Clark, C.M.Deibel, S.J.Freeman, A.M.Howard, A.J.Mitchell, P.D.Parker, D.K.Sharp, J.S.Thomas

Test of Sum Rules in Nucleon Transfer Reactions

NUCLEAR STRUCTURE 58,60,62,64Ni; calculated spectroscopic factors for neutron transfer, valence-orbit occupancies. Macfarlane-French sum rules.

NUCLEAR REACTIONS Ni(α, α), E=9 MeV; Ni(d, p), E=10 MeV; Ni(p, d), E=28 MeV; Ni(3He, d), E=18 MeV; Ni(α, t), E=38 MeV; measured reaction products. 58,60,62,64Ni; deduced spectroscopic factors, neutron occupancies. DWBA calculations.

doi: 10.1103/PhysRevLett.108.022501
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2012SH40      J.Phys.:Conf.Ser. 381, 012100 (2012)

D.K.Sharp, B.P.Kay, S.J.Freeman, J.P.Schiffer, B.B.Back, T.Bloxham, J.A.Clark, C.M.Deibel, C.R.Hoffman, A.M.Howard, J.C.Lighthall, S.T.Marley, A.J.Mitchell, P.D.Parker, J.S.Thomas, A.H.Wuosmaa

Trends in the g7/2 and h11/2 neutron single-particle energies in N = 51 isotones

NUCLEAR REACTIONS 88Sr, 90Zr, 92Mo(d, p), E=15 MeV;88Sr, 90Zr, 92Mo(α, 3He), E=50 MeV; measured E(3He), I(3He, θ), Ep, Ip(θ) using Enge split-pole spectrometer; calculated σ(θ), spectroscopic factors using DWBA code PTOLEMY; deduced spectroscopic factors for specified l-transfers. 2H(86Kr, p), E=10 MeV/nucleon; measured Ep, Ip(θ) using HELIOS spectrometer; calculated σ(θ) using DWBA; deduced σ(θ).

doi: 10.1088/1742-6596/381/1/012100
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2012TH07      Phys.Rev. C 86, 047304 (2012)

J.S.Thomas, S.J.Freeman, C.M.Deibel, T.Faestermann, R.Hertenberger, B.P.Kay, S.A.McAllister, A.J.Mitchell, J.P.Schiffer, D.K.Sharp, H.-F.Wirth

Neutron pair correlations in A=100 nuclei involved in neutrinoless double-β decay

NUCLEAR REACTIONS 98,100Mo, 100,102Ru(p, t), E=24 MeV; measured triton spectra, σ, σ(θ) using Q3D magnetic spectrograph at MLL Munich facility. 96,98Mo, 98,100Ru; deduced levels, J, π, σ(6°)/σ(15°) ratios, L-transfers. DWBA analysis. 98,100Mo(3He, 3He), E=12 MeV; measured target thickness and solid angle subtended by the spectrograph aperture. Relevance to pairing properties, and matrix elements of 0νββ decay of 100Mo to 100Ru.

doi: 10.1103/PhysRevC.86.047304
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2012WA10      Phys.Rev. C 85, 034329 (2012)

P.T.Wady, J.F.Smith, E.S.Paul, B.Hadinia, C.J.Chiara, M.P.Carpenter, C.N.Davids, A.N.Deacon, S.J.Freeman, A.N.Grint, R.V.F.Janssens, B.P.Kay, T.Lauritsen, C.J.Lister, B.M.McGuirk, M.Petri, A.P.Robinson, D.Seweryniak, D.Steppenbeck, S.Zhu

γ-ray spectroscopy of the odd-odd N=Z+2 deformed proton emitter 112Cs

NUCLEAR REACTIONS 58Ni(58Ni, 3np)112Cs, E=260 MEV; measured Eγ, Iγ, pγ-, γγ-coin, Ep, half-life, recoil-decay tagging method using Gammasphere array at ATLAS facility. 112Cs; deduced high-spin levels, J, π, band, multipolarity, configuration, alignment plots. Systematics of excitation energies, quadrupole deformation and alignments in A=110-126 odd-odd Cs isotopes, cranked shell model (CSM) calculations. 109,111Sb, 109,110,111,112Te, 112,113I; measured Eγ from competing channels.

RADIOACTIVITY 112Cs(p)[from 58Ni(58Ni, 3np), E=260 MEV]; measured E(p), I(p), Eγ, Iγ, half-life. Evidence for fine structure in 112Cs proton decay. 111Xe; deduced possible level. 109I, 113Cs(p); measured E(p).

doi: 10.1103/PhysRevC.85.034329
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2011CH42      Phys.Rev. C 84, 037304 (2011)

C.J.Chiara, W.B.Walters, I.Stefanescu, M.Alcorta, M.P.Carpenter, B.Fornal, G.Gurdal, C.R.Hoffman, R.V.F.Janssens, B.P.Kay, F.G.Kondev, W.Krolas, T.Lauritsen, C.J.Lister, E.A.McCutchan, T.Pawlat, A.M.Rogers, D.Seweryniak, N.Sharp, J.Wrzesinski, S.Zhu

Seniority, collectivity, and B(E2) enhancement in 72Ni

NUCLEAR REACTIONS 238U(76Ge, X), E=530 MeV; 198Pt, 208Pb(76Ge, X), E=450 MeV; measured Eγ, Iγ, γγ-coin, isomer half-life using Gammasphere array. 72Ni; deduced levels, J, π, B(E2). Comparison with shell-model calculations, and level systematics of 70,76Ni.

doi: 10.1103/PhysRevC.84.037304
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2011DE20      Phys.Rev. C 83, 064305 (2011)

A.N.Deacon, D.Steppenbeck, S.Zhu, S.J.Freeman, R.V.F.Janssens, M.P.Carpenter, B.Fornal, M.Honma, B.P.Kay, F.G.Kondev, J.Kozemczak, A.Larabee, T.Lauritsen, C.J.Lister, A.P.Robinson, D.Seweryniak, J.F.Smith, Y.Sun, X.Wang, F.R.Xu, Y.-C.Yang

Single-particle and collective structures in 55Cr and 55V

NUCLEAR REACTIONS 9Be(48Ca, np)55V, (48Ca, 2n)55Cr, E=172 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), DCO using Gammasphere Array. 55V, 55Cr; deduced levels, J, π, high-spin levels, configurations, multipolarities, alignments. Comparison with shell-model, and the projected shell model calculations.

NUCLEAR STRUCTURE 55Cr, 55V; calculated levels, J, π using shell model with KB3G, GXPF1A, and GXPF1B interactions, projected shell model, total Routhian surface plots.

doi: 10.1103/PhysRevC.83.064305
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2011DE28      Phys.Rev. C 84, 045802 (2011)

C.M.Deibel, K.E.Rehm, J.M.Figueira, J.P.Greene, C.L.Jiang, B.P.Kay, H.Y.Lee, J.C.Lighthall, S.T.Marley, R.C.Pardo, N.Patel, M.Paul, C.Ugalde, A.Woodard, A.H.Wuosmaa, G.Zinkann

First measurement of the 33Cl(p, α)30S reaction

NUCLEAR REACTIONS 1H(33Cl, α)30S, [33Cl secondary beam from 2H(32S, 33Cl), E=320 MeV primary reaction], E=208.1, 229.1, 250.6 MeV; measured Eα, Iα, particle spectra, (30S)α-coin; deduced cross sections. Enge split-pole magnetic spectrograph. Comparison of measured σ with NON-SMOKER code calculations.

doi: 10.1103/PhysRevC.84.045802
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2011KA27      Phys.Rev. C 84, 024325 (2011)

B.P.Kay, J.P.Schiffer, S.J.Freeman, C.R.Hoffman, B.B.Back, S.I.Baker, S.Bedoor, T.Bloxham, J.A.Clark, C.M.Deibel, A.M.Howard, J.C.Lighthall, S.T.Marley, K.E.Rehm, D.K.Sharp, D.V.Shetty, J.S.Thomas, A.H.Wuosmaa

Single-neutron energies outside 136Xe

NUCLEAR REACTIONS 2H(136Xe, p), E=10 MeV/nucleon; measured Ep, Ip, time of flight, absolute σ, σ(θ) using Helios spectrometer at the ATLAS facility at ANL. 137Xe; deduced levels, J, π, l-transfers, spectroscopic factors, configurations. DWBA analysis of σ(θ) distributions.

doi: 10.1103/PhysRevC.84.024325
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2011KA48      J.Phys.:Conf.Ser. 312, 092034 (2011)

B.P.Kay, J.P.Schiffer, S.J.Freeman, B.B.Back, S.Bedoor, S.I.Baker, T.Bloxham, J.A.Clark, C.M.Deibel, C.R.Hoffman, A.M.Howard, J.C.Lighthall, S.T.Marley, K.E.Rehm, D.K.Sharp, D.V.Shetty, J.S.Thomas, A.H.Wuosmaa

Study of valence neutrons in 136Xe with HELIOS

NUCLEAR REACTIONS 2H, C(136Xe, p), (136Xe, d), E=5, 10 MeV/nucleon; measured E(particle), I(particle, θ), A/Q ratio using position-sensitive Si detectors, ToF using radio-frequency of ATLAS facility; deduced σ(p, θ) for specified angular momentum transfer; calculated σ(θ) for specified angular momentum transfer using DWBA code PTOLEMY.

doi: 10.1088/1742-6596/312/9/092034
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2010BA06      Phys.Rev.Lett. 104, 132501 (2010)

B.B.Back, S.I.Baker, B.A.Brown, C.M.Deibel, S.J.Freeman, B.J.DiGiovine, C.R.Hoffman, B.P.Kay, H.Y.Lee, J.C.Lighthall, S.T.Marley, R.C.Pardo, K.E.Rehm, J.P.Schiffer, D.V.Shetty, A.W.Vann, J.Winkelbauer, A.H.Wuosmaa

First Experiment with HELIOS: The Structure of 13B

NUCLEAR REACTIONS 12B(d, p), E=75 MeV; measured Ep, Ip, recoil ions; deduced σ(θ), spectroscopic factors, constrained J, π.

doi: 10.1103/PhysRevLett.104.132501
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2010BL06      Phys.Rev. C 82, 027308 (2010)

T.Bloxham, B.P.Kay, J.P.Schiffer, J.A.Clark, C.M.Deibel, S.J.Freeman, S.J.Freedman, A.M.Howard, S.A.McAllister, P.D.Parker, D.K.Sharp, J.S.Thomas

Pair correlations in the neutrinoless double-β decay candidate 130Te

NUCLEAR REACTIONS 128,130Te(p, t), E=23 MeV; measured triton spectra, σ(θ). 126,128Te; deduced levels, L-transfers. Split-pole magnetic spectrograph and gas-filled focal plane detector. Comparison with data for 128,130Te(3He, n) reactions. Relevance to calculation of the matrix element for neutrinoless double-β decay of 130Te.

doi: 10.1103/PhysRevC.82.027308
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2010CR02      Phys.Rev. C 82, 014311 (2010)

H.L.Crawford, R.V.F.Janssens, P.F.Mantica, J.S.Berryman, R.Broda, M.P.Carpenter, N.Cieplicka, B.Fornal, G.F.Grinyer, N.Hoteling, B.P.Kay, T.Lauritsen, K.Minamisono, I.Stefanescu, J.B.Stoker, W.B.Walters, S.Zhu

β decay and isomeric properties of neutron-rich Ca and Sc isotopes

RADIOACTIVITY 53,54,55,56,57Sc, 53,54Ca(β-); 54,56Sc(IT)[from Be(76Ge, X), E=130 MeV/nucleon]; measured Eγ, Iγ, (fragment)β-, γγ-, βγ-, (fragment)βγ-coin, half-lives. 53,54,55,56,57Ti, 53,54,56Sc; deduced levels, J, π, logft, configurations. Comparison with GXPF1 shell-model calculations. 54Ti(β-); measured half-life. 54,55,56Sc(β-n); deduced %β--n.

NUCLEAR STRUCTURE 52,54,56Sc; calculated levels, J, π using GXPF1 shell-model.

NUCLEAR REACTIONS Be(76Ge, X)52Ca/53Ca/54Ca/53Sc/54Sc/55Sc/56Sc/55Ti/56Ti/57Ti/58Ti/57V/58V/59V/60V/, E=130 MeV/nucleon; measured yields.

doi: 10.1103/PhysRevC.82.014311
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2010DE26      Phys.Rev. C 82, 034305 (2010)

A.N.Deacon, J.F.Smith, S.J.Freeman, R.V.F.Janssens, M.P.Carpenter, B.Hadinia, C.R.Hoffman, B.P.Kay, T.Lauritsen, C.J.Lister, D.O'Donnell, J.Ollier, T.Otsuka, D.Seweryniak, K.-M.Spohr, D.Steppenbeck, S.L.Tabor, V.Tripathi, Y.Utsuno, P.T.Wady, S.Zhu

Cross-shell excitations near the "island of inversion": Structure of 30Mg

NUCLEAR REACTIONS 14C(18O, 2p), E=37 MeV; measured Eγ, Iγ, γγ-, (30Mg)γ-coin, γ(θ) using Gammasphere array, enriched 14C target. 30Mg; deduced levels, J, π, multipolarities. Comparison with shell-model calculations using the USD and SDPF-M interactions, and the Monte Carlo shell model. Systematics of first 2+ and 4+ states in 24,26,28,30,32,34Mg.

NUCLEAR REACTIONS 14C(18O, 2p)26Mg/30Mg/30Al/30Si, E=37 MeV; measured Eγ and yields.

doi: 10.1103/PhysRevC.82.034305
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2010GA06      Phys.Rev. C 81, 051304 (2010)

A.Gade, R.V.F.Janssens, T.Baugher, D.Bazin, B.A.Brown, M.P.Carpenter, C.J.Chiara, A.N.Deacon, S.J.Freeman, G.F.Grinyer, C.R.Hoffman, B.P.Kay, F.G.Kondev, T.Lauritsen, S.McDaniel, K.Meierbachtol, A.Ratkiewicz, S.R.Stroberg, K.A.Walsh, D.Weisshaar, R.Winkler, S.Zhu

Collectivity at N = 40 in neutron-rich 64Cr

NUCLEAR REACTIONS 9Be(62Fe, 62Fe'), E=73.0 MeV/nucleon [62Fe secondary beam from primary reaction 9Be(76Ge, X), E=130 MeV/nucleon], 9Be(64Fe, 64Fe'), E=67.5 MeV/nucleon [64Fe secondary beam from primary reaction 9Be(76Ge, X), E=130 MeV/nucleon], 9Be(66Fe, 66Fe'), E=82.6 MeV/nucleon [66Fe secondary beam from primary reaction 9Be(76Ge, X), E=130 MeV/nucleon], 9Be(60Cr, 60Cr'), E=80.6 MeV/nucleon [60Cr secondary beam from primary reaction 9Be(76Ge, X), E=130 MeV/nucleon], 9Be(62Cr, 62Cr'), E=74.6 MeV/nucleon [62Cr secondary beam from primary reaction 9Be(76Ge, X), E=130 MeV/nucleon], 9Be(64Cr, 64Cr'), E=87.0 MeV/nucleon [64Cr secondary beam from primary reaction 9Be(76Ge, X), E=130 MeV/nucleon]; measured Eγ, Iγ, (particle)γ-coin, σ. 62,64,66Fe, 60,62,64Cr; deduced levels, J, π. Comparison with large-scale shell-model calculations in different model spaces. 9Be(76Ge, X)62Fe/64Fe/66Fe/60Cr/62Cr/64Cr/65Mn/66Mn/67Fe/69Co, E=130 MeV/nucleon; measured yields of secondary ion beams.

doi: 10.1103/PhysRevC.81.051304
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2010MC01      Phys.Rev. C 81, 024301 (2010)

S.McDaniel, A.Gade, R.V.F.Janssens, D.Bazin, B.A.Brown, C.M.Campbell, M.P.Carpenter, J.M.Cook, A.N.Deacon, D.-C.Dinca, S.J.Freeman, T.Glasmacher, P.G.Hansen, B.P.Kay, P.F.Mantica, W.F.Mueller, J.R.Terry, J.A.Tostevin, S.Zhu

Population of positive-parity states in 53Sc through one-proton knockout

NUCLEAR REACTIONS 9Be(54Ti, 53Sc), E=72 MeV/nucleon; measured Eγ, Iγ, (particle)γ-coin using SeGA array, σ, and parallel momentum distributions in one-proton knockout reaction. 53Sc; deduced levels, J, π and configurations. Comparison with shell model calculations.

doi: 10.1103/PhysRevC.81.024301
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2010ST13      Nucl.Phys. A847, 149 (2010)

D.Steppenbeck, A.N.Deacon, S.J.Freeman, R.V.F.Janssens, M.P.Carpenter, C.R.Hoffman, B.P.Kay, T.Lauritsen, C.J.Lister, D.O'Donnell, J.Ollier, D.Seweryniak, J.F.Smith, K.-M.Spohr, S.L.Tabor, V.Tripathi, P.T.Wady, S.Zhu

Cross-shell excitations in 30Al and 30Si at high spin

NUCLEAR REACTIONS 14C(18O, X), E=37 MeV; measured Eγ, Iγ, (residual)γ-, γγ-coin, γ(θ), DCO ratios using the Gammasphere array and Fragment Mass Analyzer. 30Al, 30Si; deduced levels, J, π, multipolarities. Comparison with shell-model calculations.

doi: 10.1016/j.nuclphysa.2010.07.010
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2010WU06      Phys.Rev.Lett. 105, 132501 (2010)

A.H.Wuosmaa, B.B.Back, S.Baker, B.A.Brown, C.M.Deibel, P.Fallon, C.R.Hoffman, B.P.Kay, H.Y.Lee, J.C.Lighthall, A.O.Macchiavelli, S.T.Marley, R.C.Pardo, K.E.Rehm, J.P.Schiffer, D.V.Shetty, M.Wiedeking

15C(d, p)16C Reaction and Exotic Behavior in 16C

NUCLEAR REACTIONS 2H(15C, p)16C, E=123 MeV; measured proton spectra; deduced σ(θ), relative spectroscopic factors, excitation energies, wave functions. Comparison with shell model calculations.

doi: 10.1103/PhysRevLett.105.132501
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2009KA06      Phys.Rev. C 79, 021301 (2009)

B.P.Kay, J.P.Schiffer, S.J.Freeman, T.Adachi, J.A.Clark, C.M.Deibel, H.Fujita, Y.Fujita, P.Grabmayr, K.Hatanaka, D.Ishikawa, H.Matsubara, Y.Meada, H.Okamura, K.E.Rehm, Y.Sakemi, Y.Shimizu, H.Shimoda, K.Suda, Y.Tameshige, A.Tamii, C.Wrede

Nuclear structure relevant to neutrinoless double β decay: The valence protons in 76Ge and 76Se

NUCLEAR REACTIONS 74,76Ge, 76,78Se(d, 3He), (polarized d, 3He), E=80 MeV; measured 3He spectra, σ, angular distributions, vector analyzing powers. 74,76Ge, 76,78Se(3He, d), E=72 MeV; measured deuteron spectra, σ, angular distributions. 73,75Ga, 75,77As, 77,79Br; deduced levels, J, π, angular momentum transfers, spectroscopic factors. Comparison of angular distribution and polarization data with distorted wave Born approximation (DWBA) calculations. 76Ge, 76Se; deduced occupancies of valence proton orbitals in ground states. Comparison of occupancies of valence proton and neutron orbitals in ground states of 76Ge and 76Se with QRPA and shell-model calculations. Discussed implications for neutrinoless double β decay of 76Ge to 76Se.

doi: 10.1103/PhysRevC.79.021301
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2009KA22      Phys.Rev. C 80, 017301 (2009)

B.P.Kay, C.J.Chiara, J.P.Schiffer, F.G.Kondev, S.Zhu, M.P.Carpenter, R.V.F.Janssens, T.Lauritsen, C.J.Lister, E.A.McCutchan, D.Seweryniak, I.Stefanescu

Properties of excited states in 77Ge

NUCLEAR REACTIONS 76Ge(13C, 12C), E=27-36 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), relative σ. 77Ge; deduced levels, J, π, multipolarity. Comparison of measured σ with DWBA calculations.

doi: 10.1103/PhysRevC.80.017301
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2009ST12      Phys.Rev. C 79, 064302 (2009)

I.Stefanescu, W.B.Walters, R.V.F.Janssens, S.Zhu, R.Broda, M.P.Carpenter, C.J.Chiara, B.Fornal, B.P.Kay, F.G.Kondev, W.Krolas, T.Lauritsen, C.J.Lister, E.A.McCutchan, T.Pawlat, D.Seweryniak, J.R.Stone, N.J.Stone, J.Wrzesinski

Identification of the g9/2-proton bands in the neutron-rich 71, 73, 75, 77Ga nuclei

NUCLEAR REACTIONS 238U(76Ge, X), E=530 MeV; measured Eγ, Iγ, γγ-coin. 71,73,75,77Ga; deduced levels, J, π. Discussed level systematics of A=65-77, odd-A Ga and Cu nuclides.

doi: 10.1103/PhysRevC.79.064302
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2009ZH23      Phys.Rev. C 80, 024318 (2009)

S.Zhu, R.V.F.Janssens, B.Fornal, S.J.Freeman, M.Honma, R.Broda, M.P.Carpenter, A.N.Deacon, E.Jackson, B.P.Kay, T.Lauritsen, C.J.Lister, P.F.Mantica, T.Otsuka, D.Seweryniak, J.F.Smith, D.Steppenbeck, X.Wang

High-lying, non-yrast shell structure in 52Ti

NUCLEAR REACTIONS 9Be(48Ca, X)52Ti/52Sc/55V/55Cr, E=172 MeV; measured Eγ, Iγ, γγ-coin, angular distributions, half-lives by DSAM. 52Ti; deduced levels, J, π. Comparison with full fp shell-model calculations using GXPF1A, FPD6, and KB3G effective interactions.

RADIOACTIVITY 52Sc(β-)[from 9Be(48Ca, X), E=172 MeV]; measured Eγ, Iγ and γγ-coin. 52Ti; deduced levels, J, π.

doi: 10.1103/PhysRevC.80.024318
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2008KA01      Phys.Lett. B 658, 216 (2008)

B.P.Kay, S.J.Freeman, J.P.Schiffer, J.A.Clark, C.Deibel, A.Heinz, A.Parikh, C.Wrede

High-j single-particle neutron states outside the N = 82 core

NUCLEAR REACTIONS 138Ba, 140Ce, 142Nd, 144Sm(α, 3He), E=51 MeV; measured σ(θ), excitation energy spectra; deduced spectroscopic factor and single-neutron energies.

doi: 10.1016/j.physletb.2007.11.033
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2008SC03      Phys.Rev.Lett. 100, 112501 (2008)

J.P.Schiffer, S.J.Freeman, J.A.Clark, C.Deibel, C.R.Fitzpatrick, S.Gros, A.Heinz, D.Hirata, C.L.Jiang, B.P.Kay, A.Parikh, P.D.Parker, K.E.Rehm, A.C.C.Villari, V.Werner, C.Wrede

Nuclear Structure Relevant to Neutrinoless Double β Decay: 76Ge and 76Se

NUCLEAR REACTIONS 74,76Ge, 76,78Se(d, p), E=15 MeV; 76Ge, 76Se(p, d), E=23 MeV; 74,76Ge, 76,78Se(3He, α), E=26 MeV; 74,76Ge, 76,78Se(α, 3He), E=40 MeV; measured reaction products energy spectra, cross sections. Deduced summed spectroscopic strengths, neutron vacancies.

doi: 10.1103/PhysRevLett.100.112501
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2007FR10      Phys.Rev. C 75, 051301 (2007)

S.J.Freeman, J.P.Schiffer, A.C.C.Villari, J.A.Clark, C.Deibel, S.Gros, A.Heinz, D.Hirata, C.L.Jiang, B.P.Kay, A.Parikh, P.D.Parker, J.Qian, K.E.Rehm, X.D.Tang, V.Werner, C.Wrede

Pair correlations in nuclei involved in neutrinoless double Β decay: 76Ge and 76Se

NUCLEAR REACTIONS 74,76Ge, 76,78Se(p, t), E=23 MeV; measured yields, cross sections and angular distributions. Compared results to DWBA calculations.

doi: 10.1103/PhysRevC.75.051301
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2007ZH37      Phys.Lett. B 650, 135 (2007)

S.Zhu, R.V.F.Janssens, B.Fornal, S.J.Freeman, M.Honma, R.Broda, M.P.Carpenter, A.N.Deacon, B.P.Kay, F.G.Kondev, W.Krolas, J.Kozemczak, A.Larabee, T.Lauritsen, S.N.Liddick, C.J.Lister, P.F.Mantica, T.Otsuka, T.Pawlat, A.Robinson, D.Seweryniak, J.F.Smith, D.Steppenbeck, B.E.Tomlin, J.Wrzesinski, X.Wang

One-particle excitations outside the 54Ti semi-magic core: The 55V and 55Ti yrast structures

NUCLEAR REACTIONS 9Be(48Ca, np), (48Ca, 2p), E=172 MeV; measured Eγ, Iγ, γγ-coin, (particle)γ-coin using Gammasphere. 55V, 55Ti deduced levels, J, π. Comparison with model calculations.

doi: 10.1016/j.physletb.2007.05.014
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2006GA14      Phys.Rev. C 73, 037309 (2006)

A.Gade, R.V.F.Janssens, D.Bazin, B.A.Brown, C.M.Campbell, M.P.Carpenter, J.M.Cook, A.N.Deacon, D.-C.Dinca, S.J.Freeman, T.Glasmacher, B.P.Kay, P.F.Mantica, W.F.Mueller, J.R.Terry, S.Zhu

Spectroscopy of the odd-odd fp-shell nucleus 52Sc from secondary fragmentation

NUCLEAR REACTIONS 9Be(57Cr, X), (55V, X)52Sc, E ≈ 77 MeV/nucleon; measured Eγ, Iγ, (particle)γ-coin. 52Sc deduced levels, transitions. Comparison with shell model predictions.

doi: 10.1103/PhysRevC.73.037309
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2006GA24      Phys.Rev. C 74, 021302 (2006)

A.Gade, R.V.F.Janssens, D.Bazin, R.Broda, B.A.Brown, C.M.Campbell, M.P.Carpenter, J.M.Cook, A.N.Deacon, D.-C.Dinca, B.Fornal, S.J.Freeman, T.Glasmacher, P.G.Hansen, B.P.Kay, P.F.Mantica, W.F.Mueller, J.R.Terry, J.A.Tostevin, S.Zhu

Cross-shell excitation in two-proton knockout: Structure of 52Ca

NUCLEAR REACTIONS 9Be(54Ti, 52CaX), E=72 MeV/nucleon; measured Eγ, Iγ, (particle)γ-coin, longitudinal momentum distribution, yields following two-proton knockout; deduced inclusive σ. 52Ca deduced levels, J, π, configurations.

doi: 10.1103/PhysRevC.74.021302
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2006GA35      Phys.Rev. C 74, 047302 (2006)

A.Gade, R.V.F.Janssens, D.Bazin, B.A.Brown, C.M.Campbell, M.P.Carpenter, J.M.Cook, A.N.Deacon, D.-C.Dinca, S.J.Freeman, T.Glasmacher, M.Horoi, B.P.Kay, P.F.Mantica, W.F.Mueller, J.R.Terry, J.A.Tostevin, S.Zhu

One-neutron knockout in the vicinity of the N = 32 sub-shell closure: 9Be(57Cr, 56Cr+γ)X

NUCLEAR REACTIONS 9Be(57Cr, 56CrX), E=77 MeV/nucleon; measured Eγ, Iγ, (particle)γ-coin, parallel momentum distribution; deduced σ. 56Cr deduced levels, spectroscopic factors.

doi: 10.1103/PhysRevC.74.047302
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