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NSR database version of April 11, 2024.

Search: Author = J.J.Carroll

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2023BH05      Phys.Rev. C 108, 024312 (2023)

Soumi.Bhattacharya, V.Tripathi, S.L.Tabor, A.Volya, P.C.Bender, C.Benetti, M.P.Carpenter, J.J.Carroll, A.Chester, C.J.Chiara, K.Childers, B.R.Clark, B.P.Crider, J.T.Harke, R.Jain, S.N.Liddick, R.S.Lubna, S.Luitel, B.Longfellow, M.J.Mogannam, T.H.Ogunbeku, J.Perello, A.L.Richard, E.Rubino, S.Saha, O.A.Shehu, R.Unz, Y.Xiao, Y.Zhu

β^- decay of neutron-rich ⁴⁵Cl located at the magic number N=28

RADIOACTIVITY ⁴⁵Cl(β^-), (β^-n)[from Be(⁴⁸Ca, X), E=140 MeV/nucleon]; measured Eγ, Iγ, Eβ, Iβ, βγ-coin; deduced T_1/2, Q values, β-feedings, branchings; calculated logft. ^44,45Ar; deduced levels, J, π. Comparison to shell-model calculations with FSU interaction. Systematics of the first excited 2⁺ state energy for the even-A Ar isotopes (from N= 20 to 30). Beta Counting System (BCS) equipped with a 986 υm thick pixelated (40 strips x 40 strips) DSSD detector, followed by SSCD and surrounded by 16 Clover detectors at NSCL.

NUCLEAR STRUCTURE ^43,44,45Ar; calculated levels, J, π, B(M1), B(E2), proton and neutron occupation numbers. Shell-model calculations with FSU interaction. Comparison to experimental data.

doi: 10.1103/PhysRevC.108.024312
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2023CR03      Nucl.Instrum.Methods Phys.Res. A1055, 168525 (2023)

B.P.Crider, C.J.Prokop, S.N.Liddick, H.M.Albers, M.Alshudifat, A.D.Ayangeakaa, M.P.Carpenter, J.J.Carroll, J.Chen, C.J.Chiara, A.C.Dombos, S.Go, R.Grzywacz, J.Harker, R.V.F.Janssens, N.Larson, T.Lauritsen, R.Lewis, S.J.Quinn, F.Recchia, D.Seweryniak, A.Spyrou, S.Suchyta, W.B.Walters, S.Zhu

New method for level-lifetime measurements with thick scintillators

NUCLEAR REACTIONS ⁹Be(⁷⁶Ge, X)⁶⁸Ni/⁶⁸Zn/⁶⁹Ni/⁷⁰Ni, E=140 MeV/nucleon; measured reaction products, Eγ, Iγ, Eβ, Iβ, βγ-coin.; deduced γ-ray energies, level T_1/2. Comparison with available data. The National Superconducting Cyclotron Laboratory (NSCL), the coupled cyclotron facility.

doi: 10.1016/j.nima.2023.168525
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2023RZ02      Phys.Rev. C 108, L031302 (2023)

J.Rzadkiewicz, K.Slabkowska, M.Polasik, L.Syrocki, J.J.Carroll, C.J.Chiara

^93mMo isomer depletion via nuclear excitation by electron capture in resonant transfer into highly excited open-shell atomic states

doi: 10.1103/PhysRevC.108.L031302
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2022CH09      Phys.Rev. C 105, 024319 (2022)

A.Chester, B.A.Brown, S.P.Burcher, M.P.Carpenter, J.J.Carroll, C.J.Chiara, P.A.Copp, B.P.Crider, J.T.Harke, D.E.M.Hoff, K.Kolos, S.N.Liddick, B.Longfellow, M.J.Mogannam, T.H.Ogunbeku, C.J.Prokop, D.Rhodes, A.L.Richard, O.A.Shehu, A.S.Tamashiro, R.Unz, Y.Xiao

Half-life measurement of the 199-keV isomeric state in ⁷⁶Ga

RADIOACTIVITY ⁷⁶Zn(β^-)[from ⁷⁶Cu β^- formed in ⁹Be(⁸⁶Kr, X), E=140 MeV/nucleon]; ⁷⁶Ga(IT)[from ⁷⁶Zn(β^-)]; measured Eβ, Iβ, Eγ, Iγ, βγ-coin. ⁷⁶Ga; deduced levels J, π, transition strength, T_1/2 of the 199-keV isomeric transition from time difference between pulses produced by β-decay populating the isomeric state and γ from the decay of the isomer. Systematics of low-lying levels in ^{72,74,76,78,80}Ga. Beam implantation in CeBr detector (NSCL-MSU ).

NUCLEAR STRUCTURE ⁷⁶Ga; calculated levels, J, π, transition strength. Shell model calculations in the jj44 model space with the jun45, jj44b, and jj44c Hamiltonians.

doi: 10.1103/PhysRevC.105.024319
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2022JA13      Phys.Rev. C 106, 044303 (2022)

L.Janiak, M.Gierlik, G.Madejowski, R.Prokopowicz, S.Wronka, J.Rzadkiewicz, J.J.Carroll, C.J.Chiara

Half-life of the 188-keV isomer of ¹⁸⁴Re

RADIOACTIVITY ¹⁸⁴Re(IT), (EC)[from Re(n, γ), E=thermal]; ⁶⁰Co, ¹³⁴Cs, ¹⁸⁶Re(β^-); measured Eγ, Iγ, T_1/2 of decays of ¹⁸⁴Re isomer and ¹³⁴Cs g.s. by γ-decay curves, with reference to activities and half-lives of decays of ⁶⁰Co and ¹⁸⁶Re ground states; deduced T_1/2 of ¹⁸⁴Re isomer with improved precision by two orders of magnitude as compared to the literature value.

doi: 10.1103/PhysRevC.106.044303
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2022SA20      Phys.Lett. B 829, 137059 (2022)

M.Saxena, W.-J.Ong, Z.Meisel, D.E.M.Hoff, N.Smirnova, P.C.Bender, S.P.Burcher, M.P.Carpenter, J.J.Carroll, A.Chester, C.J.Chiara, R.Conaway, P.A.Copp, B.P.Crider, J.Derkin, A.Estrae, G.Hamad, J.T.Harke, R.Jain, H.Jayatissa, S.N.Liddick, B.Longfellow, M.Mogannam, F.Montes, N.Nepal, T.H.Ogunbeku, A.L.Richard, H.Schatz, D.Soltesz, S.K.Subedi, I.Sultana, A.S.Tamashiro, V.Tripathi, Y.Xiao, R.Zink

⁵⁷Zn β-delayed proton emission establishes the ⁵⁶Ni rp-process waiting point bypass

RADIOACTIVITY ⁵⁷Zn(β⁺p), (β⁺) [from ⁹Be(⁷⁸Kr, X)⁵⁷Zn, E=150 MeV/nucleon]; measured decay products, Eγ, Iγ, Eβ, Iβ, Ep, Ip; deduced T_1/2, βp branching ratio, β-γ-p decay mode transitions. The Coupled Cyclotron Facility of NSCL.

doi: 10.1016/j.physletb.2022.137059
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2022TR03      Phys.Rev. C 106, 064314 (2022)

V.Tripathi, S.Bhattacharya, E.Rubino, C.Benetti, J.F.Perello, S.L.Tabor, S.N.Liddick, P.C.Bender, M.P.Carpenter, J.J.Carroll, A.Chester, C.J.Chiara, K.Childers, B.R.Clark, B.P.Crider, J.T.Harke, B.Longfellow, R.S.Lubna, S.Luitel, T.H.Ogunbeku, A.L.Richard, S.Saha, N.Shimizu, O.A.Shehu, Y.Utsuno, R.Unz, Y.Xiao, S.Yoshida, Y.Zhu

β^- decay of exotic P and S isotopes with neutron number near 28

RADIOACTIVITY ^42,43,44P, ^44,46S(β^-), (β^-n) [from Be(⁴⁸Ca, X), E=140 MeV/nucleon)]; ⁴¹S(β^-) [from ⁴²P(β^-n]; measured Iβ, Eγ, Iγ, βγ-coin, (implant)γ-coin; deduced T_1/2, logft, delayed neutron emission probabilities. ⁴²P; deduced J, π of the ground state. ^42,41S, ⁴¹Cl; deduced levels, J, π, transition intensities. The half-lives were extracted from the fitting of decay curves. Comparison to calculations performed with shell-model using SDPFSDG-MU interaction. Beta Counting System (BCS) - 40x40 DSSD as the implant and β detector, surrounded by a γ-array of 16 Clover detectors in close geometry (NSCL).

doi: 10.1103/PhysRevC.106.064314
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2021CH56      Phys.Rev. C 104, 054314 (2021)

A.Chester, B.A.Brown, S.P.Burcher, M.P.Carpenter, J.J.Carroll, C.J.Chiara, P.A.Copp, B.P.Crider, J.T.Harke, D.E.M.Hoff, K.Kolos, S.N.Liddick, B.Longfellow, M.J.Mogannam, T.H.Ogunbeku, C.J.Prokop, D.Rhodes, A.L.Richard, O.A.Shehu, A.S.Tamashiro, R.Unz, Y.Xiao

Identification of a new isomeric state in ⁷⁶Zn following the β decay of ⁷⁶Cu

RADIOACTIVITY ⁷⁶Cu(β^-)[from ⁹Be(⁸⁶Kr, X), E=140 MeV/nucleon, followed by separation of fragments of interest using A1900 fragment separator at NSCL-MSU facility]; measured reaction products, particle identification plot of ions implanted in CeBr₃ detector, Eγ, Iγ, (⁷⁶Cu implants)γ-coin, γγ-coin, T_1/2 of a nanosecond isomer by fast timing method using an array of 16 HPGe clover detectors and 15 LaBr₃ detectors. ⁷⁶Zn; deduced levels, J, π, new isomer, Comparison with shell-model calculations.

NUCLEAR STRUCTURE ⁷⁶Zn; calculated levels, J, π, level T_1/2, isomers, proton and neutron occupancy numbers of negative-parity isomeric states using shell model with jj4b, jj4c and JUN45 interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.104.054314
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Data from this article have been entered in the XUNDL database. For more information, click here.

2021CR01      Phys.Lett. B 816, 136210 (2021)

F.C.L.Crespi, A.Bracco, E.G.Lanza, A.Tamii, N.Blasi, F.Camera, O.Wieland, N.Aoi, D.L.Balabanski, S.Bassauer, A.S.Brown, M.P.Carpenter, J.J.Carroll, M.Ciemala, A.Czeszumska, P.J.Davies, V.Derya, L.M.Donaldson, Y.D.Fang, H.Fujita, G.Gey, H.T.Ha, M.N.Harakeh, T.Hashimoto, N.Ichige, E.Ideguchi, A.Inoue, J.Isaak, C.Iwamoto, D.G.Jenkins, T.Klaus, N.Kobayashi, T.Koike, M.Krzysiek, M.K.Raju, M.Liu, A.Maj, L.Morris, P.von Neumann-Cosel, S.Noji, H.J.Ong, S.G.Pickstone, N.Pietralla, D.Savran, J.M.Schmitt, M.Spieker, G.Steinhilber, C.Sullivan, B.Wasilewska, M.Weinert, V.Werner, Y.Yamamoto, T.Yamamoto, R.G.T.Zegers, X.Zhou, S.Zhu, A.Zilges

The structure of low-lying 1^- states in ^{90, 94}Zr from (α, α'γ) and (p, p'γ) reactions

NUCLEAR REACTIONS ^90,94Zr(p, p'γ), E=80 MeV; ^90,94Zr(α, α'γ), E=130 MeV; measured reaction products, Eγ, Iγ; deduced ratio of the measured yields, dipole states σ, transition densities, low-lying dipole strength. The array CAGRA with HPGe detectors.

doi: 10.1016/j.physletb.2021.136210
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2021MO25      Phys.Rev. C 104, 054323 (2021)

L.Morris, D.G.Jenkins, M.N.Harakeh, J.Isaak, N.Kobayashi, A.Tamii, S.Adachi, P.Adsley, N.Aoi, A.Bracco, A.Brown, M.P.Carpenter, J.J.Carroll, S.Courtin, F.C.L.Crespi, P.J.Davies, G.Fruet, Y.D.Fang, H.Fujita, G.Gey, T.H.Hoang, N.Ichige, E.Ideguchi, A.Inoue, C.Iwamoto, T.Koike, M.Kumar Raju, M.L.Liu, D.Montanari, P.von Neumann-Cosel, S.Noji, H.J.Ong, D.Savran, J.M.Schmitt, C.Sullivan, B.Wasilewska, M.Weinert, V.Werner, Y.Yamamoto, R.G.T.Zegers, X.H.Zhou, S.Zhu

Search for in-band transitions in the candidate superdeformed band in ²⁸Si

NUCLEAR REACTIONS ²⁸Si(α, α'), E=130 MeV beam from K140 AVF cyclotron at the RCNP-Osaka; measured Eα, Iα using the Grand Raiden spectrometer, Eγ, Iγ, γγ-coin using CAGRA array of 12 HPGe clover detectors and four LaBr₃ detectors. ²⁸Si; deduced levels, J, π, bands; analyzed 4+ member in search of a superdeformed (SD) band, branching ratios of γ rays from the 4+ member, and B(E2); based on comparison of experimental B(E2) values with predicted B(E2) values from antisymmetrized molecular dynamics (AMD) calculations for a set of identified states in ²⁸Si, strongly rejected hypothesized superdeformed band in this nuclide.

doi: 10.1103/PhysRevC.104.054323
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Data from this article have been entered in the XUNDL database. For more information, click here.

2021RZ01      Phys.Rev.Lett. 127, 042501 (2021)

J.Rzadkiewicz, M.Polasik, K.Slabkowska, L.Syrocki, J.J.Carroll, C.J.Chiara

Novel Approach to ^93mMo Isomer Depletion: Nuclear Excitation by Electron Capture in Resonant Transfer Process

RADIOACTIVITY ⁹³Mo(IT), (EC); analyzed available data; deduced partial and total probabilities for isomer depletion.

doi: 10.1103/PhysRevLett.127.042501
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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.

2020CA11      Phys.Rev. C 101, 054314 (2020)

R.J.Carroll, P.M.Walker, G.J.Lane, M.W.Reed, A.Akber, H.M.Albers, J.J.Carroll, D.M.Cullen, A.C.Dai, C.Fahlander, M.S.M.Gerathy, S.S.Hota, G.Lotay, T.Kibedi, V.Margerin, A.J.Mitchell, N.Palalani, T.Palazzo, Z.Patel, R.Shearman, A.E.Stuchbery, F.R.Xu

γ-ray spectroscopy of a four-quasiparticle isomer band in ¹⁷⁴Re

NUCLEAR REACTIONS ¹⁶⁰Dy(¹⁹F, 5n), E=107 MeV pulsed beam from the 14-UD Pelletron at the Australian National University]; measured prompt and delayed Eγ, Iγ, γγ-coin, half-lives of isomers by γ(t) and γγ(t) using the CAESAR HPGe detector array. ¹⁷⁴Re; deduced levels, J, π, bands, γ-branching ratios, four-quasiparticle Kπ=(14-) isomer, Nilsson configurations, g_K, Weisskopf hindrances and reduced hindrances for transitions from the (14-) isomer and the (8-) bandhead; calculated potential energy surfaces. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.101.054314
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Data from this article have been entered in the XUNDL database. For more information, click here.

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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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2673. Data from this article have been entered in the XUNDL database. For more information, click here.

2019MI12      Phys.Rev. C 100, 014302 (2019)

S.L.Miller, K.A.Villafana, M.A.Riley, J.Simpson, D.J.Hartley, E.S.Paul, A.D.Ayangeakaa, J.S.Baron, P.F.Bertone, A.J.Boston, M.P.Carpenter, J.J.Carroll, J.Cavey, C.J.Chiara, P.Chowdhury, U.Garg, S.S.Hota, E.G.Jackson, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, M.Litz, W.C.Ma, J.Matta, E.A.McCutchan, S.Mukhopadhyay, P.J.Nolan, E.E.Pedicini, L.L.Riedinger, J.F.Sharpey-Schafer, J.R.Vanhoy, A.Volya, X.Wang, S.Zhu

Backbending, seniority, and Pauli blocking of pairing correlations at high rotational frequencies in rapidly rotating nuclei

NUCLEAR STRUCTURE ^{156,157,158,159,160,161,162,163,164,165,166,168,170}Er, ^{158,159,160,161,162,163,164,165,166,167,168,169,170,171,172}Yb, ^{160,161,162,163,164,165,166,167,168,169,170,171,172,173,174}Hf, ^{164,165,166,167,168,169,170,171,172,173,174,175,176,177}W; calculated band-crossing frequencies of the first (AB) and the second (BC) i_13/2 neutron alignments. ¹⁶²Er, ¹⁶⁴Yb, ¹⁶⁶Hf, ¹⁶⁸W: calculated AB and BC crossing frequencies as function of quadrupole deformation, and as function of the percentage of the odd-even mass difference for N=94 nuclei. Comparison with experimental data. A=134-200, Z=52-82; systematics of E(first 4+)/E(first 2+) ratios for even-even nuclei.

doi: 10.1103/PhysRevC.100.014302
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2019RZ01      Phys.Rev. C 99, 044309 (2019)

J.Rzadkiewicz, M.Polasik, K.Slabkowska, L.Syrocki, E.Weder, J.J.Carroll, C.J.Chiara

Beam-based scenario for ^242mAm isomer depletion via nuclear excitation by electron capture

NUCLEAR REACTIONS ²⁴²Pu(d, 2n), (d, 3n), (d, F), E=6.2-7.5 MeV/nucleon; ²³⁸U(⁷Li, 3n), (⁷Li, 4n), (⁷Li, 5n), (⁷Li, F), E=5.0-6.3 MeV/nucleon; calculated σ(E) using GEMINI++ fusion-evaporation code. ⁷Li, ¹²C, ²⁷Al(²⁴²Am, X), E=2.5-6.0 MeV/nucleon; calculated mean equilibrium charge state, resonance strength for nuclear excitation by electron capture (NEEC) process in ^242mAm isomer as function of kinetic energy of ^242mAm ions for capture of an electron into various subshells. ^242mAm; discussed beam-based scenario for the production and depletion of the 141 y, 5- isomer through its excitation to the 52.7-keV level by electron capture.

doi: 10.1103/PhysRevC.99.044309
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2019SL01      Acta Phys.Pol. B50, 651 (2019)

K.Slabkowska, E.Weder, L.Syrocki, M.Polasik, J.Rzadkiewicz, J.J.Carroll, C.J.Chiara

^93mMo Isomer Depletion via Nuclear Excitation by Electron Capture: Energy Released for Different Atomic Subshells as Benchmarks for a Beam-based Scenario Approach

RADIOACTIVITY ⁹³Mo(IT); calculated energy release in electron capture process into different atomic subshells; analyzed scenarios for nuclear excitation by electron capture (NEEC), isomer depletion. Multiconfiguration Dirac–Fock (MCDF) calculations implemented with the GRASP and GRASP2K packages.

doi: 10.5506/aphyspolb.50.651
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2018CH13      Nature(London) 554, 7691 (2018)

C.J.Chiara, J.J.Carroll, M.P.Carpenter, J.P.Greene, D.J.Hartley, R.V.F.Janssens, G.J.Lane, J.C.Marsh, D.A.Matters, M.Polasik, J.Rzadkiewicz, D.Seweryniak, S.Zhu, S.Bottoni, A.B.Hayes, S.A.Karamian

Isomer depletion as experimental evidence of nuclear excitation by electron capture

NUCLEAR REACTIONS ⁷Li(⁹⁰Zr, 3np), E=840 MeV; measured Eγ, Iγ, γγγ-coin using Gammasphere array at ATLAS-ANL. ⁹³Mo; deduced levels, first experimental evidence of process of nuclear excitation by electron capture (NEEC) through the isomer depletion of 2425-keV isomer and excitation of the 2430-keV intermediate level from the 2425-keV isomer, and observation of 2475-268-685-1478 γ cascade in coincidence.

NUCLEAR REACTIONS ⁹⁰Zr(⁷Li, 3np), E(cm)=same as above for reverse kinematic reaction; measured Eγ, Iγ, γγ-coin at Australian National Laboratory. ⁹³Mo; deduced levels, non-observation of 2475- and 268-keV γ rays in γγ coincidences in the normal kinematics reaction consistent with NEEC interpretation in the inverse kinematic reaction study at Argonne.

doi: 10.1038/nature25483
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Data from this article have been entered in the XUNDL database. For more information, click here.

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, E_ex) 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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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2637. Data from this article have been entered in the XUNDL database. For more information, click here.

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 g_K-g_R values. Comparison with multi-quasiparticle blocking calculations.

doi: 10.1103/PhysRevC.96.014318
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2017PO03      Phys.Rev. C 95, 034312 (2017)

M.Polasik, K.Slabkowska, J.J.Carroll, C.J.Chiara, L.Syrocki, E.Weder, J.Rzadkiewicz

Resonance conditions for ^93mMo isomer depletion via nuclear excitation by electron capture in a beam-based scenario

NUCLEAR REACTIONS ⁴He(⁹¹Zr, xn)⁹⁴Mo/⁹³Mo/^93mMo/⁹²Mo, E<10 MeV/nucleon; calculated σ(E) using PACE4 code.

NUCLEAR STRUCTURE ^93mMo; analyzed scenarios for nuclear excitation by electron capture (NEEC), NEEC resonance window width, isomer depletion. Discussed role of complex atomic processes for resonance conditions to be satisfied in an experimental observation of the NEEC process.

doi: 10.1103/PhysRevC.95.034312
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2016CR05      Phys.Lett. B 763, 108 (2016)

B.P.Crider, C.J.Prokop, S.N.Liddick, M.Al-Shudifat, A.D.Ayangeakaa, M.P.Carpenter, J.J.Carroll, J.Chen, C.J.Chiara, H.M.David, A.C.Dombos, S.Go, R.Grzywacz, J.Harker, R.V.F.Janssens, N.Larson, T.Lauritsen, R.Lewis, S.J.Quinn, F.Recchia, A.Spyrou, S.Suchyta, W.B.Walters, S.Zhu

Shape coexistence from lifetime and branching-ratio measurements in ^{68, 70}Ni

RADIOACTIVITY ⁷⁰Co, ⁶⁸Fe, ⁶⁸Co(β^-) [from ⁹Be(⁷⁶Ge, X)⁷⁰Co/⁶⁸Fe]; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, T_1/2, branching ratios, B(E2).

doi: 10.1016/j.physletb.2016.10.020
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2016FO21      Phys.Rev. C 94, 044608 (2016)

N.Fotiades, M.Devlin, R.O.Nelson, T.Kawano, J.J.Carroll

Feeding of Rh and Ag isomers in fast-neutron-induced reactions

NUCLEAR REACTIONS ¹⁰³Rh, ¹⁰⁹Ag(n, n'γ), (n, 2nγ), (n, 3nγ), E<90 MeV; measured Eγ, Iγ using GEANIE array for γ-ray detection and the broad-spectrum pulsed neutron source of the LANSCE-WNR facility. ^101,102,103Rh, ^107,108,109Ag; deduced levels, J, π, absolute γ-ray cross sections as function of incident neutron energy, sums of cross sections and compared with evaluated data in ENDF/B-VII.1, ¹⁰³Rh, ¹⁰⁹Ag(n, γ), (n, n'), (n, 2n), (n, 3n), (n, 4n), (n, 5n), (n, p), (n, np), (n, 2np), (n, 3np), (n, d), (n, nd), (n, 2nd), (n, 3nd), (n, α), (n, nα), (n, 2nα), (n, 3nα), (n, t), (n, nt), (n, 2nt), E=6-44 MeV; calculated production cross sections for various reaction channels using the code CoH3.

doi: 10.1103/PhysRevC.94.044608
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2016MA35      Phys.Rev. C 93, 054319 (2016)

D.A.Matters, A.G.Lerch, A.M.Hurst, L.Szentmiklosi, J.J.Carroll, B.Detwiler, Zs.Revay, J.W.McClory, S.R.McHale, R.B.Firestone, B.W.Sleaford, M.Krticka, T.Belgya

Investigation of ¹⁸⁶Re via radiative thermal-neutron capture on ¹⁸⁵Re

NUCLEAR REACTIONS ¹⁸⁵Re(n, γ), E=thermal and cold neutrons; measured Eγ, Iγ, σ(γ) using Prompt Gamma Activation Analysis (PGAA) facility at the Budapest Research Reactor. ¹⁸⁶Re; deduced levels, J, π, S(n), Γ₀, photon strength functions, total radiative thermal-neutron capture cross section. Statistical model calculations and analysis using DICEBOX code. Comparison with previous experimental data.

doi: 10.1103/PhysRevC.93.054319
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2016SE01      J.Phys.(London) G43, 015103 (2016)

J.Sethi, R.Palit, J.J.Carroll, S.Karamian, S.Saha, S.Biswas, Z.Naik, T.Trivedi, M.S.Litz, P.Datta, S.Chattopadhyay, R.Donthi, U.Garg, S.Jadhav, H.C.Jain, S.Kumar, D.Mehta, B.S.Naidu, G.H.Bhat, J.A.Sheikh, S.Sihotra, P.M.Walker

Low-lying states near the I^π = 6⁺ isomer in ¹⁰⁸Ag

NUCLEAR REACTIONS ¹⁰⁰Mo(¹¹B, 3n), E=39 MeV; measured reaction products, Eγ, Iγ, γ-γ-coinc.; deduced σ(θ), σ, energy levels, J, π, γ-ray intensities. Comparison with projected Hartree-Fock calculations.

doi: 10.1088/0954-3899/43/1/015103
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2015AK02      Phys.Rev. C 91, 031301 (2015)

A.Akber, M.W.Reed, P.M.Walker, Yu.A.Litvinov, G.J.Lane, T.Kibedi, K.Blaum, F.Bosch, C.Brandau, J.J.Carroll, D.M.Cullen, I.J.Cullen, A.Y.Deo, B.Detwiler, C.Dimopoulou, G.D.Dracoulis, F.Farinon, H.Geissel, E.Haettner, M.Heil, R.S.Kempley, R.Knobel, C.Kozhuharov, J.Kurcewicz, N.Kuzminchuk, S.Litvinov, Z.Liu, R.Mao, C.Nociforo, F.Nolden, W.R.Plass, Zs.Podolyak, A.Prochazka, C.Scheidenberger, D.Shubina, M.Steck, Th.Stohlker, B.Sun, T.P.D.Swan, G.Trees, H.Weick, N.Winckler, M.Winkler, P.J.Woods, T.Yamaguchi

Increased isomeric lifetime of hydrogen-like ^192mOs

RADIOACTIVITY ^192mOs(IT)[from ⁹Be(¹⁹⁷Au, X), E=478-492 MeV/nucleon]; measured half-life of the highly-charged stored ions using Schottky mass spectrometry in Experimental Storage Ring (ESR) of the isomeric state of ¹⁹²Os at UNILAC and SIS-18 heavy-ion accelerators of GSI. Discussed increased half-life of the hydrogen-like ions of isomeric state as compared to that of the neutral ions.

doi: 10.1103/PhysRevC.91.031301
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2015KA43      Phys.Atomic Nuclei 78, 757 (2015)

S.A.Karamian, J.J.Carroll, N.V.Aksenov, Yu.A.Albin, A.G.Belov, G.A.Bozhikov, S.N.Dmitriev, G.Ya.Starodub

Production of isotopes and isomers with irradiation of Z = 47-50 targets by 23-MeV bremsstrahlung

NUCLEAR REACTIONS Ag, Sn(γ, X)¹⁰⁶Ag/¹⁰⁸Ag/¹¹³In/¹¹⁵In/¹¹⁷In/¹¹³Cd/¹²³Sn, E<23 MeV; measured reaction products, Eγ, Iγ; deduced relative and partial yields of isomeric and ground states.

doi: 10.1134/S1063778815060113
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2015MA60      Phys.Rev. C 92, 054304 (2015)

D.A.Matters, N.Fotiades, J.J.Carroll, C.J.Chiara, J.W.McClory, T.Kawano, R.O.Nelson, M.Devlin

New transitions and feeding of the J^π = (8⁺) isomer in ¹⁸⁶Re

NUCLEAR REACTIONS ¹⁸⁷Re(n, 2n), E=10-25 MeV; measured Eγ, Iγ, nγ-, γγ-coin, time-of-flight for neutrons, excitation functions using GEANIE array at LANL-Neutron Science Center Weapons Neutron Research facility. ¹⁸⁶Re; deduced levels, J, π, improved energy of the long-lived (8+) isomer in ¹⁸⁶Re. Comparison with previous experimental results, and with COH 3.4 and TALYS 1.6 calculations.

doi: 10.1103/PhysRevC.92.054304
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2015PR10      Phys.Rev. C 92, 061302 (2015)

C.J.Prokop, B.P.Crider, S.N.Liddick, A.D.Ayangeakaa, M.P.Carpenter, J.J.Carroll, J.Chen, C.J.Chiara, H.M.David, A.C.Dombos, S.Go, J.Harker, R.V.F.Janssens, N.Larson, T.Lauritsen, R.Lewis, S.J.Quinn, F.Recchia, D.Seweryniak, A.Spyrou, S.Suchyta, W.B.Walters, S.Zhu

New low-energy 0⁺ state and shape coexistence in ⁷⁰Ni

RADIOACTIVITY ^70,70mCo(β^-)[from ⁹Be(⁷⁶Ge, X), E=130 MeV/nucleon using A1900 fragment separator at NSCL-MSU]; measured Eγ, Iγ, βγγ-, γγ-coin, level half-life by βγ(t) using SeGA array and silicon PIN detectors. ⁷⁰Ni; deduced levels, J, π, energy and half-life of excited (0+) state, configuration. Comparison with Monte Carlo shell-model calculations with A3DA interaction. ⁶⁸Co, ⁶⁹Ni, ⁷⁰Zn; observed γ rays from decay of contaminants.

doi: 10.1103/PhysRevC.92.061302
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2015SE06      Acta Phys.Pol. B46, 703 (2015)

J.Sethi, R.Palit, J.J.Carroll, S.Karamian, S.Saha, S.Biswas, Z.Naik, T.Trivedi, M.S.Litz, P.Datta, S.Chattopadhyay, R.Donthi, U.Garg, S.Jadhav, H.C.Jain, S.Kumar, D.Mehta, B.S.Naidu, G.H.Bhat, J.A.Sheikh, S.Sihotra, P.M.Walker

Spectroscopy of the Low-lying States Near the High Spin Isomer in ¹⁰⁸Ag

NUCLEAR REACTIONS ¹⁰⁰Mo(¹¹B, 3n), E=39 MeV; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, γ-ray intensities, branching ratios.

doi: 10.5506/APhysPolB.46.703
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2014HA22      Phys.Rev. C 90, 017301 (2014)

D.J.Hartley, R.V.F.Janssens, L.L.Riedinger, M.A.Riley, X.Wang, S.Miller, A.D.Ayangeakaa, M.P.Carpenter, J.J.Carroll, J.Cavey, C.J.Chiara, P.Chowdhury, U.Garg, S.S.Hota, E.G.Jackson, F.G.Kondev, T.Lauritsen, M.Litz, W.C.Ma, J.Matta, E.S.Paul, E.E.Pedicini, J.Simpson, J.R.Vanhoy, S.Zhu

High-spin structure of odd-odd ¹⁷²Re

NUCLEAR REACTIONS ¹²⁰Sn(⁵⁵Mn, 3n), E=257 MeV; measured Eγ, Iγ, γγ, three- and higher-fold coincidences, γγ(θ) ratios using Gammasphere array at ATLAS-ANL facility. ¹⁷²Re; deduced high-spin levels, J, π, bands, configurations, alignment plots.

doi: 10.1103/PhysRevC.90.017301
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2013CH12      Phys.Rev.Lett. 110, 122502 (2013)

L.Chen, P.M.Walker, H.Geissel, Yu.A.Litvinov, K.Beckert, P.Beller, F.Bosch, D.Boutin, L.Caceres, J.J.Carroll, D.M.Cullen, I.J.Cullen, B.Franzke, J.Gerl, M.Gorska, G.A.Jones, A.Kishada, R.Knobel, C.Kozhuharov, J.Kurcewicz, S.A.Litvinov, Z.Liu, S.Mandal, F.Montes, G.Munzenberg, F.Nolden, T.Ohtsubo, Z.Patyk, W.R.Plass, Zs.Podolyak, S.Rigby, N.Saito, T.Saito, C.Scheidenberger, E.C.Simpson, M.Shindo, M.Steck, B.Sun, S.J.Williams, H.Weick, M.Winkler, H.-J.Wollersheim, T.Yamaguchi

Direct Observation of Long-Lived Isomers in ²¹²Bi

NUCLEAR REACTIONS Be(²³⁸U, X)²¹²Bi, E=670 MeV/nucleon; measured revolution frequency; deduced isomeric states excitation energies, level scheme, T_1/2. Comparison with shell model calculations.

doi: 10.1103/PhysRevLett.110.122502
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2013HA36      Phys.Rev. C 88, 044323 (2013)

D.J.Hartley, E.E.Pedicini, R.V.F.Janssens, L.L.Riedinger, M.A.Riley, X.Wang, S.Miller, A.D.Ayangeakaa, M.P.Carpenter, J.J.Carroll, J.Cavey, C.J.Chiara, P.Chowdhury, U.Garg, S.S.Hota, E.G.Jackson, F.G.Kondev, T.Lauritsen, M.Litz, W.C.Ma, J.Matta, E.S.Paul, J.Simpson, J.R.Vanhoy, S.Zhu

Possible deformation evolution in the π i_13/2 structure of ¹⁷¹Re

NUCLEAR REACTIONS ¹²⁰Sn(⁵⁵Mn, 4n), E=257 MeV; measured Eγ, Iγ, γγ-coin, three- and higher-fold coincidences, angular correlation ratios using Gammasphere array at ATLAS-ANL facility. ¹⁷¹Re; deduced high-spin levels, J, π, multipolarity, rotational bands, alignments, configurations, B(M1)/B(E2), moment of inertia plots. No evidence found for wobbling mode of excitation. Comparison with cranked shell-model calculations.

doi: 10.1103/PhysRevC.88.044323
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2013SE12      Phys.Lett. B 725, 85 (2013)

J.Sethi, R.Palit, S.Saha, T.Trivedi, G.H.Bhat, J.A.Sheikh, P.Datta, J.J.Carroll, S.Chattopadhyay, R.Donthi, U.Garg, S.Jadhav, H.C.Jain, S.Karamian, S.Kumar, M.S.Litz, D.Mehta, B.S.Naidu, Z.Naik, S.Sihotra, P.M.Walker

Structure of nearly degenerate dipole bands in ¹⁰⁸Ag

NUCLEAR REACTIONS ¹⁰⁰Mo(¹¹B, 3n), E=39 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced level energies, J, π, B(M1), B(M1)/B(E2), high spin negative parity states. Comparison with microscopic triaxial projected shell model approach calculations.

doi: 10.1016/j.physletb.2013.06.054
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2013SH30      Phys.Rev. C 88, 024310 (2013)

D.Shubina, R.B.Cakirli, Yu.A.Litvinov, K.Blaum, C.Brandau, F.Bosch, J.J.Carroll, R.F.Casten, D.M.Cullen, I.J.Cullen, A.Y.Deo, B.Detwiler, C.Dimopoulou, F.Farinon, H.Geissel, E.Haettner, M.Heil, R.S.Kempley, C.Kozhuharov, R.Knobel, J.Kurcewicz, N.Kuzminchuk, S.A.Litvinov, Z.Liu, R.Mao, C.Nociforo, F.Nolden, Z.Patyk, W.R.Plass, A.Prochazka, M.W.Reed, M.S.Sanjari, C.Scheidenberger, M.Steck, Th.Stohlker, B.Sun, T.P.D.Swan, G.Trees, P.M.Walker, H.Weick, N.Winckler, M.Winkler, P.J.Woods, T.Yamaguchi, C.Zhou

Schottky mass measurements of heavy neutron-rich nuclides in the element range 70≤Z≤79 at the GSI Experimental Storage Ring

ATOMIC MASSES ^181,183Lu, ^185,186Hf, ^187,188Ta, ^189,190,191W, ^192,193Re, ¹⁹⁵Os; measured masses by Schottky mass spectrometry (SMS) technique using FRS-ESR facility at GSI. ¹⁸¹Hf, ^{181,182,183,185}Ta, ^184,186,187W, ^189,191Re, ^{188,190,192,193}Os, ¹⁹¹Ir, ^194,196Pt, ¹⁹⁶Au; measured Schottky frequency spectra for calibration purpose; deduced mass excesses, and compared with AME-2003. ¹⁷⁹Lu, ^182,182mHf, ¹⁸⁴Ta, ^{186,187,188,190m,192m}Re, ^{189,190m,191,194}Os, ^{190,192,193,194,195}Ir, ¹⁹¹Pt; measured Schottky frequency spectra. Bare, H- or He-like isotopes produced in ⁹Be(¹⁹⁷Au, X) reaction using E(¹⁹⁷Au)=469.35 MeV/nucleon beam from UNILAC and SIS-18 accelerators at GSI. Investigated correlations between S(2n) and energies of first 2+ states in even-even N=84-124, Z=62-78 isotopes; deduced collectivity. Systematics of S(2n) values for even N=100-124, odd Z=67-77.

doi: 10.1103/PhysRevC.88.024310
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2012CH19      Nucl.Phys. A882, 71 (2012)

L.Chen, W.R.Plass, H.Geissel, R.Knobel, C.Kozhuharov, Yu.A.Litvinov, Z.Patyk, C.Scheidenberger, K.Siegien-Iwaniuk, B.Sun, H.Weick, K.Beckert, P.Beller, F.Bosch, D.Boutin, L.Caceres, J.J.Carroll, D.M.Cullen, I.J.Cullen, B.Franzke, J.Gerl, M.Gorska, G.A.Jones, A.Kishada, J.Kurcewicz, S.A.Litvinov, Z.Liu, S.Mandal, F.Montes, G.Munzenberg, F.Nolden, T.Ohtsubo, Zs.Podolyak, R.Propri, S.Rigby, N.Saito, T.Saito, M.Shindo, M.Steck, P.M.Walker, S.Williams, M.Winkler, H.-J.Wollersheim, T.Yamaguchi

New results on mass measurements of stored neutron-rich nuclides in the element range from Pt to U with the FRS-ESR facility at 360-400 MeV/u

NUCLEAR REACTIONS ⁹Be(²³⁸U, F), E=670 MeV/nucleon; measured reaction fragments using fragment separator, fragment mass using SMS (Schottky Mass Spectrometry); calculated mass excess;deduced neutron-rich exotic fragments mass using FFT of Schottky frequency spectra, mass excess systematic deviations from modern mass models. Compared with AME03 tables.

ATOMIC MASSES ¹²⁸Sn, ¹³³Sb, ¹³⁶Te, ¹⁴⁴La, ¹⁴⁶Ce, ²⁰²Au, ²⁰⁷Hg, ²²⁰At, ^{224,225,226,227,229}Fr, ^{229,230,231,232}Ac, ²³⁵Th, ^{235,236,237,238}Pa, ²⁰²Pt, ²¹³Tl, ^217,218Bi, ^{219,220,221,222}Po, ^{221,222,223,224}At, ^{223,224,225,226,227,228}Rn, ^228,230,231Fr, ^{231,232,233,234}Ra, ^{233,234,235,236}Ac, ^236,237Th; measured revolution frequency spectra; deduced mass excess and their uncertainties, systematic deviations of up to 1500 keV from modern mass models. Comparison with available data.

doi: 10.1016/j.nuclphysa.2012.03.002
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2012KA38      Phys.Atomic Nuclei 75, 1362 (2012)

S.A.Karamian, J.J.Carroll

Calculated yield of isomer depletion due to NEEC for ^93mMo recoils

NUCLEAR REACTIONS ⁴He(⁹¹Zr, 2n), E=6 MeV/nucleon; calculated yield of isomer depletion. Comparison with available data.

doi: 10.1134/S1063778812110117
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2012RE19      Phys.Rev. C 86, 054321 (2012)

M.W.Reed, P.M.Walker, I.J.Cullen, Yu.A.Litvinov, D.Shubina, G.D.Dracoulis, K.Blaum, F.Bosch, C.Brandau, J.J.Carroll, D.M.Cullen, A.Y.Deo, B.Detwiler, C.Dimopoulou, G.X.Dong, F.Farinon, H.Geissel, E.Haettner, M.Heil, R.S.Kempley, R.Knobel, C.Kozhuharov, J.Kurcewicz, N.Kuzminchuk, S.Litvinov, Z.Liu, R.Mao, C.Nociforo, F.Nolden, W.R.Plass, Zs.Podolyak, A.Prochazka, C.Scheidenberger, M.Steck, Th.Stohlker, B.Sun, T.P.D.Swan, G.Trees, H.Weick, N.Winckler, M.Winkler, P.J.Woods, F.R.Xu, T.Yamaguchi

Long-lived isomers in neutron-rich Z=72-76 nuclides

NUCLEAR REACTIONS Be(¹⁹⁷Au, X)¹⁸³Hf/¹⁸⁴Hf/¹⁸⁶Hf/¹⁸⁶Ta/¹⁸⁷Ta, ¹⁸⁶W/¹⁹⁰W/¹⁹⁰Re/¹⁹²Re/¹⁹⁴Re/¹⁹⁴Ir/¹⁹⁴Os/¹⁹⁵Os/¹⁹⁶Pt, E=478-492 MeV/nucleon; measured Schottky mass and frequency spectra, ion revolution frequencies, survival curves of ions, isomer energies and half-lives of highly charged (helium-like, hydrogen-like, and bare) ions, γ spectra. FRS and ESR at UNILAC-SIS accelerator facility in GSI. ^183,184,186Hf, ^186,187Ta, ¹⁸⁶W, ^190,192,194Re, ¹⁹⁵Os; deduced levels, isomers, J, π, configuration, decay modes. Comparison with potential energy surface, and multi-quasiparticle (MQP) calculations. ¹⁸⁶Ta, ¹⁹²Re; calculated 2qp levels. Systematics of theoretical and experimental 2qp 8- isomers and 4qp levels in ^{170,172,174,176,178,180,182,184,186,188,190}Hf.

doi: 10.1103/PhysRevC.86.054321
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2012RE22      J.Phys.:Conf.Ser. 381, 012058 (2012)

M.W.Reed, P.M.Walker, I.J.Cullen, Yu.A.Litvinov, K.Blaum, F.Bosch, C.Brandau, J.J.Carroll, D.M.Cullen, A.Y.Deo, B.Detwiler, C.Dimopoulou, G.D.Dracoulis, F.Farinon, H.Geissel, E.Haettner, M.Heil, R.S.Kempley, R.Knobel, C.Kozhuharov, J.Kurcewicz, N.Kuzminchuk, S.Litvinov, Z.Liu, R.Mao, C.Nociforo, F.Nolden, W.R.Plass, A.Prochazka, C.Scheidenberger, D.Shubina, M.Steck, Th.Stohlker, B.Sun, T.P.D.Swan, G.Trees, H.Weick, N.Winckler, M.Winkler, P.J.Woods, T.Yamaguchi

Technique for Resolving Low-lying Isomers in the Experimental Storage Ring (ESR) and the Occurrence of an Isomeric State in ¹⁹²Re

doi: 10.1088/1742-6596/381/1/012058
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2011HA15      Int.J.Mod.Phys. E20, 474 (2011)

A.B.Hayes, D.Cline, C.Y.Wu, A.M.Hurst, M.P.Carpenter, J.P.Greene, R.V.F.Janssens, T.Lauritsen, D.Seweryniak, S.Zhu, S.A.Karamian, P.M.Walker, T.P.D.Swan, S.V.Rigby, D.M.Cullen, N.M.Lumley, P.Mason, J.J.Carroll, B.Detwiler, T.Harle, I.Mills, G.Trees

New structures in ¹⁷⁸Hf and Coulomb excitation of isomers

NUCLEAR REACTIONS ²⁰⁸Pb(¹⁷⁸Hf, ¹⁷⁸Hf'), E=985 MeV; measured Eγ, Iγ, particle-γ-coin.; deduced energy levels, J, π, isomer bands, rotational sequence feeding.

doi: 10.1142/S0218301311017879
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2011KA06      Phys.Rev. C 83, 024604 (2011)

S.A.Karamian, J.J.Carroll

Cross section for inelastic neutron "acceleration" by ¹⁷⁸Hf^m2

NUCLEAR REACTIONS ¹⁷⁸Hf(n, n'), (n, γ), E=thermal; analyzed inelastic neutron acceleration (INNA) cross section for ^178m2Hf target, σ(isomer)/σ(g.s.), statistical estimates for the probability of different reaction channels. ¹⁷⁸Hf; deduced levels which are candidates for INNA with ^178m2Hf isomer as target. ¹⁷⁹Hf; deduced level population from parent levels in ¹⁷⁸Hf. Comparison with theoretically predicted cross section for INNA.

doi: 10.1103/PhysRevC.83.024604
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2011KA19      Nucl.Instrum.Methods Phys.Res. A646, 87 (2011)

S.A.Karamian, J.J.Carroll, N.V.Aksenov, Y.A.Albin, G.A.Bozhikov, S.N.Dmitriev, G.Y.Starodub, G.K.Vostokin

Production of isomers in compound and transfer reactions with ⁴He ions

NUCLEAR REACTIONS ¹⁷⁶Yb, Lu(α, xn), (α, X)¹⁷⁵Yb/¹⁷¹Lu/¹⁷²Lu/¹⁷³Lu/¹⁷⁴Lu/¹⁷⁷Lu/¹⁷¹Hf/¹⁷²Hf/¹⁷³Hf/¹⁷⁵Hf/¹⁷⁸Hf/¹⁷⁹Hf/¹⁷⁵Ta/¹⁷⁶Ta/¹⁷⁷Ta, E=35 MeV; measured Eγ, Iγ; deduced yields, σ, isomer to ground state ratios. Comparison with Fermi-gas model within the formalism of Jackson-Sikkeland calculations.

doi: 10.1016/j.nima.2011.03.010
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2010CH19      Phys.Lett. B 691, 234 (2010)

L.Chen, W.R.Plass, H.Geissel, R.Knobel, C.Kozhuharov, Yu.A.Litvinov, Z.Patyk, C.Scheidenberger, K.Siegien-Iwaniuk, B.Sun, H.Weick, K.Beckert, P.Beller, F.Bosch, D.Boutin, L.Caceres, J.J.Carroll, D.M.Cullen, I.J.Cullen, B.Franzke, J.Gerl, M.Gorska, G.A.Jones, A.Kishada, J.Kurcewicz, S.A.Litvinov, Z.Liu, S.Mandal, F.Montes, G.Munzenberg, F.Nolden, T.Ohtsubo, Zs.Podolyak, R.Propri, S.Rigby, N.Saito, T.Saito, M.Shindo, M.Steck, P.Ugorowski, P.M.Walker, S.Williams, M.Winkler, H.-J.Wollersheim, T.Yamaguchi

Discovery and investigation of heavy neutron-rich isotopes with time-resolved Schottky spectrometry in the element range from thallium to actinium

NUCLEAR REACTIONS Be(²³⁸U, X)²³⁶Ac/²²⁴At/²²²Po/²²¹Po/²¹³Tl, E=670 MeV/nucleon; measured revolution frequency of the cooled fragments; deduced T_1/2. Comparison with theoretical models, Darmstadt storage-cooler ring ESR.

ATOMIC MASSES ²³⁶Ac, ²²⁴At, ²²²Po, ²²¹Po, ²¹³Tl; measured revolution frequency of the cooled fragments; deduced atomic masses.

doi: 10.1016/j.physletb.2010.05.078
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2010HA24      Phys.Rev. C 82, 044319 (2010)

A.B.Hayes, D.Cline, K.J.Moody, I.Ragnarsson, C.Y.Wu, J.A.Becker, M.P.Carpenter, J.J.Carroll, D.Gohlke, J.P.Greene, A.A.Hecht, R.V.F.Janssens, S.A.Karamian, T.Lauritsen, C.J.Lister, R.A.Macri, R.Propri, D.Seweryniak, X.Wang, R.Wheeler, S.Zhu

Coulomb excitation of a ²⁴²Am isomeric target: E2 and E3 strengths, rotational alignment, and collective enhancement

NUCLEAR REACTIONS ^242mAm(⁴⁰Ar, ⁴⁰Ar'), E=170.5 MeV; measured Eγ, Iγ, (particle)γ-, γγ-coin using Gammasphere array. ²⁴²Am; deduced levels, J, π, rotational bands, Nilsson configurations, band parameters, alignments, B(E1), B(E2) and B(E3) strengths. Coulomb excitation. Comparison of alignment of the observed bands in ²⁴²Am with single-particle alignments in ²⁴¹Am and with particle-rotor model calculations.

doi: 10.1103/PhysRevC.82.044319
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2010RE07      Phys.Rev.Lett. 105, 172501 (2010)

M.W.Reed, I.J.Cullen, P.M.Walker, Yu.A.Litvinov, K.Blaum, F.Bosch, C.Brandau, J.J.Carroll, D.M.Cullen, A.Y.Deo, B.Detwiller, C.Dimopoulou, G.D.Dracoulis, F.Farinon, H.Geissel, E.Haettner, M.Heil, R.S.Kempley, R.Knobel, C.Kozhuharov, J.Kurcewicz, N.Kuzminchuk, S.Litvinov, Z.Liu, R.Mao, C.Nociforo, F.Nolden, W.R.Plass, A.Prochazka, C.Scheidenberger, M.Steck, Th.Stohlker, B.Sun, T.P.D.Swan, G.Trees, H.Weick, N.Winckler, M.Winkler, P.J.Woods, T.Yamaguchi

Discovery of Highly Excited Long-Lived Isomers in Neutron-Rich Hafnium and Tantalum Isotopes through Direct Mass Measurements

NUCLEAR REACTIONS ⁹Be(¹⁹⁷Au, X)¹⁸³Hf/¹⁸⁴Hf/¹⁸⁶Hf/¹⁸⁶Ta/¹⁸⁷Ta, E=478-492 MeV/nucleon; measured Schottky frequency spectra of ions stored in an ESR storage ring; deduced T_1/2, J, π, isomer region near N=116.

doi: 10.1103/PhysRevLett.105.172501
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2009CA20      Phys.Lett. B 679, 203 (2009)

J.J.Carroll, S.A.Karamian, R.Propri, D.Gohlke, N.Caldwell, P.Ugorowski, T.Drummond, J.Lazich, H.Roberts, M.Helba, Z.Zhong, M.-T.Tang, J.-J.Lee, K.Liang

Search for low-energy induced depletion of ¹⁷⁸Hf^m2 at the SPring-8 synchrotron

NUCLEAR REACTIONS ^172,178Hf(γ, γ'), E=9.5352-9.5851 keV; measured Eγ, Iγ, γγ-coin; deduced integral σ and that induced depletion of 2nd metastable state not seen.

doi: 10.1016/j.physletb.2009.07.025
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2009CH08      Phys.Rev.Lett. 102, 122503 (2009)

L.Chen, Yu.A.Litvinov, W.R.Plass, K.Beckert, P.Beller, F.Bosch, D.Boutin, L.Caceres, R.B.Cakirli, J.J.Carroll, R.F.Casten, R.S.Chakrawarthy, D.M.Cullen, I.J.Cullen, B.Franzke, H.Geissel, J.Gerl, M.Gorska, G.A.Jones, A.Kishada, R.Knobel, C.Kozhuharov, S.A.Litvinov, Z.Liu, S.Mandal, F.Montes, G.Munzenberg, F.Nolden, T.Ohtsubo, Z.Patyk, Zs.Podolyak, R.Propri, S.Rigby, N.Saito, T.Saito, C.Scheidenberger, M.Shindo, M.Steck, P.Ugorowski, P.M.Walker, S.Williams, H.Weick, M.Winkler, H.-J.Wollersheim, T.Yamaguchi

Schottky Mass Measurement of the ²⁰⁸Hg Isotope: Implication for the Proton-Neutron Interaction Strength around Doubly Magic ²⁰⁸Pb

ATOMIC MASSES ²⁰⁸Hg; measured atomic mass using time resolved Schottky mass spectrometry.

doi: 10.1103/PhysRevLett.102.122503
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2008JO03      Phys.Rev. C 77, 034311 (2008)

G.A.Jones, S.J.Williams, P.M.Walker, Zs.Podolyak, S.Zhu, M.P.Carpenter, J.J.Carroll, R.S.Chakrawarthy, P.Chowdhury, I.J.Cullen, G.D.Dracoulis, A.B.Garnsworthy, G.Hackman, R.V.F.Janssens, T.L.Khoo, F.G.Kondev, G.J.Lane, Z.Liu, D.Seweryniak, N.J.Thompson

High-spin, multiparticle isomers in ^{121, 123}Sb

NUCLEAR REACTIONS ²⁷Al(¹⁷⁸Hf, X)¹²¹Sb/¹²³Sb, E=1150 MeV; measured Eγ, Iγ, half-lives of isomers, internal conversion coefficients; deduced multipolarities, mixing ratios, γγ(θ). ^121,123Sb; deduced levels, J, π. ^120,122Sn, ^{117,119,125,126,127,128,129,130,131}Sb; systematics.

doi: 10.1103/PhysRevC.77.034311
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2007CA27      Nucl.Instrum.Methods Phys.Res. B261, 960 (2007)

J.J.Carroll

Nuclear structure and the search for induced energy release from isomers

NUCLEAR STRUCTURE ²⁴²Am, ¹⁸⁰Ta, ¹⁷⁸Hf, ¹⁷⁷Lu; evaluated isomeric transition data for induced energy release.

doi: 10.1016/j.nimb.2007.01.128
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2007JO13      Phys.Rev. C 76, 047303 (2007)

G.A.Jones, P.H.Regan, P.M.Walker, Zs.Podolyak, P.D.Stevenson, M.P.Carpenter, J.J.Carroll, R.S.Chakrawarthy, P.Chowdhury, A.B.Garnsworthy, R.V.F.Janssens, T.L.Khoo, F.G.Kondev, G.J.Lane, Z.Liu, D.Seweryniak, N.J.Thompson, S.Zhu, S.J.Williams

Identification of a high-spin isomer in ⁹⁹Mo

NUCLEAR REACTIONS ²⁷Al(¹⁷⁸Hf, X), E=1150 MeV; measured Eγ, Iγ, γγ-coin. ⁹⁹Mo deduced levels, J, π, half-life, isomer, band structure.

doi: 10.1103/PhysRevC.76.047303
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2007KA27      Phys.Rev. C 75, 057301 (2007)

S.A.Karamian, J.J.Carroll, S.Iliev, S.P.Tretyakova

Weak K hindrance manifested in α decay of the ¹⁷⁸Hf^m2 isomer

RADIOACTIVITY ¹⁷⁸Hf(α); measured partial half lives and hindrance factors.

doi: 10.1103/PhysRevC.75.057301
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2007WA08      Phys.Rev. C 75, 034301 (2007)

S.Walter, F.Stedile, J.J.Carroll, C.Fransen, G.Friessner, N.Hollmann, H.von Garrel, J.Jolie, O.Karg, F.Kappeler, U.Kneissl, C.Kohstall, P.von Neumann-Cosel, A.Linnemann, D.Mucher, N.Pietralla, H.H.Pitz, G.Rusev, M.Scheck, C.Scholl, R.Schwengner, V.Werner, K.Wisshak

Photon scattering experiments on the quasistable, odd-odd mass nucleus ¹⁷⁶Lu

NUCLEAR REACTIONS ¹⁷⁶Lu(γ, γ'), E=2.3, 3.1 MeV bremsstrahlung; measured Eγ, Iγ. ¹⁷⁶Lu deduced transitions, B(M1), B(E1), strength distribution.

doi: 10.1103/PhysRevC.75.034301
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2006CH10      Phys.Rev. C 73, 024306 (2006)

R.S.Chakrawarthy, P.M.Walker, J.J.Ressler, E.F.Zganjar, G.C.Ball, M.B.Smith, A.N.Andreyev, S.F.Ashley, R.A.E.Austin, D.Bandyopadhyay, J.A.Becker, J.J.Carroll, D.S.Cross, D.Gohlke, J.J.Daoud, P.E.Garrett, G.F.Grinyer, G.Hackman, G.A.Jones, R.Kanungo, W.D.Kulp, Y.Litvinov, A.C.Morton, W.J.Mills, C.J.Pearson, R.Propri, C.E.Svensson, R.Wheeler, S.J.Williams

K^π = 0⁺ 2.29 s isomer in neutron-rich ¹⁷⁴Tm

RADIOACTIVITY ¹⁷⁴Tm(IT) [from Ta(p, X)]; measured Eγ, Iγ, E(ce), I(ce), γγ-, (ce)γ-, (ce)(ce)-coin, T_1/2. ¹⁷⁴Tm deduced levels, J, π, configurations, ICC, B(E3).

doi: 10.1103/PhysRevC.73.024306
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2006UG01      Nucl.Instrum.Methods Phys.Res. A565, 657 (2006)

P.Ugorowski, R.Propri, S.A.Karamian, D.Gohlke, J.Lazich, N.Caldwell, R.S.Chakrawarthy, M.Helba, H.Roberts, J.J.Carroll

Design and characterization of a compact multi-detector array for studies of induced gamma emission: Spontaneous decay of ^178m2Hf as a test case

RADIOACTIVITY ^178mHf(IT); measured Eγ, Iγ, multiplicities.

doi: 10.1016/j.nima.2006.05.209
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2005WA38      Phys. Today 58, 39 (2005)

P.M.Walker, J.J.Carroll

Ups and downs of nuclear isomers

doi: 10.1063/1.1996473
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2004CA22      Laser Phys.Lett. 1, 275 (2004)

J.J.Carroll

An experimental perspective on triggered gamma emission from nuclear isomers

NUCLEAR STRUCTURE ¹⁷⁸Hf, ¹⁸⁰Ta, ²⁴²Am; analyzed levels, isomeric states features, triggered γ-emission.

doi: 10.1002/lapl.200310065
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2004KA51      Nucl.Instrum.Methods Phys.Res. A530, 463 (2004)

S.A.Karamian, J.J.Carroll, J.Adam, N.A.Demekhina

Production of the ^178m2Hf isomer using a 4.5-GeV electron accelerator

NUCLEAR REACTIONS Ta(γ, X)^178mHf/¹⁷²Hf/¹⁵⁰Eu/¹³³Ba, E=4.5 GeV bremsstrahlung; measured production σ.

doi: 10.1016/j.nima.2004.04.224
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2004SM10      Nucl.Phys. A746, 617c (2004)

M.B.Smith, P.M.Walker, R.S.Chakrawarthy, R.A.E.Austin, G.C.Ball, J.J.Carroll, E.Cunningham, P.Finlay, P.E.Garrett, G.F.Grinyer, G.Hackman, B.Hyland, K.Koopmans, W.D.Kulp, J.R.Leslie, A.A.Phillips, R.Propri, P.H.Regan, F.Sarazin, M.A.Schumaker, H.C.Scraggs, T.Shizuma, C.E.Svensson, J.von Schwarzenberg, J.C.Waddington, D.Ward, J.L.Wood, B.Washbrook, E.F.Zganjar

Studies of high-K isomers at TRIUMF-ISAC

RADIOACTIVITY ¹⁷⁸Hf, ^178,179Lu(IT) [from Ta(p, X)]; measured Eγ, Iγ, γγ-coin following high-spin isomer decay.

doi: 10.1016/j.nuclphysa.2004.09.101
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2003SC15      Phys.Rev. C 67, 064313 (2003)

M.Scheck, D.Belic, P.von Brentano, J.J.Carroll, C.Fransen, A.Gade, H.von Garrel, U.Kneissl, C.Kohstall, A.Linnemann, N.Pietralla, H.H.Pitz, F.Stedile, R.Toman, V.Werner

Photon scattering experiments off ¹⁷⁶Hf and the systematics of low-lying dipole modes in the stable even-even Hf isotopes ^{176, 178, 180}Hf

NUCLEAR REACTIONS ¹⁷⁶Hf(γ, γ'), E=2.4, 4.1 MeV bremsstrahlung; measured Eγ, Iγ. ¹⁷⁶Hf deduced levels, J, π, excitation B(M1), B(E1).

NUCLEAR STRUCTURE ^176,178,180Hf; analyzed dipole strength distributions.

doi: 10.1103/PhysRevC.67.064313
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2003SM05      Phys.Rev. C 68, 031302 (2003)

M.B.Smith, P.M.Walker, G.C.Ball, J.J.Carroll, P.E.Garrett, G.Hackman, R.Propri, F.Sarazin, H.C.Scraggs

γ rays emitted in the decay of 31-yr ¹⁷⁸Hf^m2

RADIOACTIVITY ^178mHf(IT) [from Ta(p, X)]; measured Eγ, Iγ, γγ-coin; deduced hindrance factors. ¹⁷⁸Hf deduced levels, J, π, rotational band features.

doi: 10.1103/PhysRevC.68.031302
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2002AG12      Hyperfine Interactions 143, 7 (2002)

F.J.Agee, J.J.Carroll, L.A.Rivlin, V.Vuletic

Proposal for Observation of a Hidden Nuclear Population Inversion

doi: 10.1023/A:1024021331444
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2002BE18      Phys.Rev. C65, 035801 (2002)

D.Belic, C.Arlandini, J.Besserer, J.de Boer, J.J.Carroll, J.Enders, T.Hartmann, F.Kappeler, H.Kaiser, U.Kneissl, E.Kolbe, K.Langanke, M.Loewe, H.J.Maier, H.Maser, P.Mohr, P.von Neumann-Cosel, A.Nord, H.H.Pitz, A.Richter, M.Schumann, F.-K.Thielemann, S.Volz, A.Zilges

Photo-Induced Depopulation of the ¹⁸⁰Ta^m Isomer via Low-Lying Intermediate States: Structure and astrophysical implications

NUCLEAR REACTIONS ^180mTa(γ, γ'), E=0.8-3.1 MeV bremsstrahlung; measured delayed Eγ, Iγ, X-ray spectra; deduced activation yields. ¹⁸⁰Ta deduced intermediate states energies, transition strengths. Astrophysical implications discussed. Comparisons with previous results, model predictions.

RADIOACTIVITY ¹⁸⁰Ta(EC), (β^-); measured T_1/2.

doi: 10.1103/PhysRevC.65.035801
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2002CA55      Hyperfine Interactions 143, 37 (2002)

J.J.Carroll, J.Burnett, T.Drummond, J.Lepak, R.Propri D.Smith, S.A.Karamian, J.Adam, F.Stedile, F.J.Agee

Initial Search for Triggered Gamma Emission from ¹⁷⁸Hf^m2 Using the YSU Miniball Array

NUCLEAR REACTIONS ^178mHf(γ, γ'), E=100 keV bremsstrahlung; measured Eγ, Iγ, γγ-coin; deduced upper limit for triggered emission rate.

doi: 10.1023/A:1024033601402
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2002FA19      Hyperfine Interactions 143, 55 (2002)

J.P.Farrell, V.Dudnikov, J.J.Carroll, G.Merkel

Beam-Based Production of ^178m2Hf

NUCLEAR REACTIONS ¹⁷⁶Yb(⁹Be, 3nα), (⁹Be, 5n), E=65 MeV; measured Eγ, Iγ; deduced isomer production σ upper limit.

doi: 10.1023/A:1024085618240
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2002KA74      Hyperfine Interactions 143, 69 (2002)

S.A.Karamian, J.J.Carroll

Possibility of Combining Nuclear Level Pumping in a Plasma with Lasing in a Solid

NUCLEAR STRUCTURE ⁹⁸Tc, ¹⁰³Ru, ¹⁶¹Dy, ¹⁸¹Ta, ¹⁸⁹Os, ¹⁹⁷Au, ²³⁵U, ^242mAm; analyzed possible resonance between atomic and nuclear levels, photoexcitation and nuclear excitation by electron transition mechanisms.

ATOMIC PHYSICS ⁹⁸Tc, ¹⁰³Ru, ¹⁶¹Dy, ¹⁸¹Ta, ¹⁸⁹Os, ¹⁹⁷Au, ²³⁵U, ^242mAm; analyzed possible resonance between atomic and nuclear levels, photoexcitation and nuclear excitation by electron transition mechanisms.

doi: 10.1023/A:1024069214606
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2002RO45      Hyperfine Interactions 143, 111 (2002)

H.E.Roberts, M.Helba, J.J.Carroll, J.Burnett, T.Drummond, J.Lepak, R.Propri, Z.Zhong, F.J.Agee

Gamma Spectroscopy of Hf-178m2 Using Synchrotron X-Rays

NUCLEAR REACTIONS ^178mHf(X-ray, γ), E=9.5-13.5 keV; measured Eγ, Iγ; deduced no induced isomer decay.

doi: 10.1023/A:1024073315514
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2002ZA15      Hyperfine Interactions 143, 153 (2002)

A.A.Zadernovsky, J.J.Carroll

Non-Radiative Triggering of Long-Lived Nuclear Isomers

NUCLEAR REACTIONS ^174m,177mLu, ^178m,179mHf, ^242mAm(p, p'), E=1, 10 MeV; calculated σ for Coulomb triggering of isomer. ^101mRh, ^150mEu, ^160mHo, ^190mIr, ^242mAm(e, X), (X-ray, X), E=low; calculated σ for nuclear excitation by electron transition or electron capture.

doi: 10.1023/A:1024063610971
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2001CA61      Hyperfine Interactions 135, 3 (2001)

J.J.Carroll, S.A.Karamian, L.A.Rivlin, A.A.Zadernovsky

X-Ray-Driven Gamma Emission

doi: 10.1023/A:1013967219408
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2001VO13      Nucl.Phys. A688, 237c (2001)

P.von Neumann-Cosel, C.Arlandini, D.Belic, J.Besserer, J.de Boer, J.J.Carroll, J.Enders, T.Hartmann, F.Kappeler, H.Kaiser, U.Kneissl, M.Loewe, H.J.Maier, H.Maser, P.Mohr, A.Nord, H.H.Pitz, A.Richter, M.Schumann, S.Volz, A.Zilges

Photoactivation of ^180mTa and s-Process Nucleosynthesis of Nature's Rarest Naturally Occuring Isotope

NUCLEAR REACTIONS ¹⁸⁰Ta(γ, γ'), E=0.8-3.1 MeV; measured Eγ, σ; deduced ¹⁸⁰Ta effective half-life under s-process conditions.

doi: 10.1016/S0375-9474(01)00706-0
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2001WA45      Phys.Rev. C64, 061302 (2001)

P.M.Walker, G.D.Dracoulis, J.J.Carroll

Interpretation of the Excitation and Decay of ¹⁸⁰Ta^m Through a Kπ = 5⁺ Band

NUCLEAR STRUCTURE ¹⁸⁰Ta; analyzed levels, γ spectra; calculated level widths; deduced intermediate states in excitation and decay of low-lying isomer.

doi: 10.1103/PhysRevC.64.061302
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2000KA32      Phys.Rev. C62, 024601 (2000)

S.A.Karamian, J.Adam, A.G.Belov, J.J.Carroll, Yu.V.Norseev, V.I.Stegailov, P.Chaloun

Light-Mass Yields and Fine Structure of Mass Distributions in ²³²Th Photofission

NUCLEAR REACTIONS ²³²Th(γ, F), E=7.5, 12.0, 24.0 MeV bremsstralung; measured fission fragment mass distributions; ²³²Th(γ, F)²⁴Na/²⁸Mg, E=16.5, 24.0 MeV bremsstrahlung; measured yields; deduced fission mechanism features.

doi: 10.1103/PhysRevC.62.024601
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1999BE65      Phys.Rev.Lett. 83, 5242 (1999)

D.Belic, C.Arlandini, J.Besserer, J.de Boer, J.J.Carroll, J.Enders, T.Hartmann, F.Kappeler, H.Kaiser, U.Kneissl, M.Loewe, H.J.Maier, H.Maser, P.Mohr, P.von Neumann-Cosel, A.Nord, H.H.Pitz, A.Richter, M.Schumann, S.Volz, A.Zilges

Photoactivation of ¹⁸⁰Ta^m and Its Implications for the Nucleosynthesis of Nature's Rarest Naturally Occurring Isotope

NUCLEAR REACTIONS Ta, ^180mTa(γ, γ'), E=0.8-3.1 MeV bremsstrahlung; measured ground-state production yield. Implications for s-process nucleosynthesis discussed. Enriched and natural targets.

doi: 10.1103/PhysRevLett.83.5242
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1999CO05      Phys.Rev.Lett. 82, 695 (1999); Comments Phys.Rev.Lett. 84, 2541 (2000)

C.B.Collins, F.Davanloo, M.C.Iosif, R.Dussart, J.M.Hicks, S.A.Karamian, C.A.Ur, I.I.Popescu, V.I.Kirischuk, J.J.Carroll, H.E.Roberts, P.McDaniel, C.E.Crist

Accelerated Emission of Gamma Rays from the 31-yr Isomer of ¹⁷⁸Hf Induced by X-Ray Irradiation

NUCLEAR REACTIONS ^178mHf(X-ray, γ), E=70, 90 keV bremsstralung; measured Eγ, Iγ(t); deduced accelerated decay, resonant x-ray absorption σ.

RADIOACTIVITY ^178mHf(IT); measured Eγ, Iγ(t) with and without x-ray irradiation; deduced accelerated decay, resonant x-ray absorption σ.

doi: 10.1103/PhysRevLett.82.695
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1999KA03      Phys.Rev. C59, 755 (1999)

S.A.Karamian, C.B.Collins, J.J.Carroll, J.Adam, A.G.Belov, V.I.Stegailov

Fast Neutron Induced Depopulation of the ¹⁸⁰Ta^m Isomer

NUCLEAR REACTIONS ^180mTa(n, n'), E ≈ 5.6 MeV; measured ground-state yield; deduced isomer depopulation probability. ¹⁸⁰Ta deduced K-mixing at moderate excitation energy. Activation technique.

doi: 10.1103/PhysRevC.59.755
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset41381.

1998KA14      Phys.Rev. C57, 1812 (1998)

S.A.Karamian, C.B.Collins, J.J.Carroll, J.Adam

Isomeric to Ground State Ratio in the ^180mTa(γ, γ')^180m,gTa Reaction

NUCLEAR REACTIONS ^180mTa(γ, γ')^180gTa, E=2.5-7.6 MeV bremsstrahlung; measured yield; deduced σ. ¹⁸⁰Ta deduced K-mixing intermediate states level density. Monte Carlo simulation.

doi: 10.1103/PhysRevC.57.1812
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1997CA63      Hyperfine Interactions 107, 149 (1997)

J.J.Carroll, C.B.Collins

Limits on Spurious Contributions to Integrated Cross Sections for Photoexcitation and De-Excitation of Isomers

doi: 10.1023/A:1012028427406
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1997CO30      Hyperfine Interactions 107, 141 (1997)

C.B.Collins, J.J.Carroll, Yu.Ts.Oganessian, S.A.Karamian

Evidence for K Mixing in ¹⁷⁸Hf

NUCLEAR STRUCTURE ^{174,175,176,177,178}Hf; analyzed isomeric states properties; deduced evidence for multiparticle isomer in ¹⁷⁸Hf.

doi: 10.1023/A:1012080411476
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1997OL04      Hyperfine Interactions 107, 197 (1997)

S.Olariu, J.J.Carroll, C.B.Collins, I.I.Popescu

Emission of Gamma Rays by Electron-Nuclear Double Transitions

doi: 10.1023/A:1012024326497
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1994VO23      Nucl.Instrum.Methods Phys.Res. A338, 425 (1994)

P.von Neumann-Cosel, N.Huxel, A.Richter, C.Spieler, J.J.Carroll, C.B.Collins

Absolute Calibration of Low Energy Energy, Thick Target Bremsstrahlung

NUCLEAR REACTIONS, ICPND ¹¹⁵In(γ, γ'), E=1-7 MeV bremsstrahlung; measured isomer yield vs E; deduced bremsstrahlung spectra absolute calibration. Thick target bremsstrahlung, Monte Carlo program.

doi: 10.1016/0168-9002(94)91326-9
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1993CA24      Phys.Rev. C48, 2238 (1993)

J.J.Carroll, C.B.Collins, K.Heyde, M.Huber, P.von Neumann-Cosel, V.Yu.Ponomarev, D.G.Richmond, A.Richter, C.Schlegel, T.W.Sinor, K.N.Taylor

Intermediate Structure in the Photoexcitation of ^77mSe, ^79mBr, and ^137mBa

NUCLEAR REACTIONS, ICPND ⁷⁷Se, ⁷⁹Br, ¹³⁷Ba(γ, γ'), E=2-7 MeV bremsstrahlung; measured γ yield vs E for isomer excitation. ⁷⁷Se, ⁷⁹Br, ¹³⁷Ba deduced intermediate states excitation σ, shapes role.

doi: 10.1103/PhysRevC.48.2238
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1993HU05      Nucl.Phys. A559, 253 (1993)

M.Huber, P.von Neumann-Cosel, A.Richter, C.Schlegel, R.Schulz, J.J.Carroll, K.N.Taylor, D.G.Richmond, T.W.Sinor, C.B.Collins, V.Yu.Ponomarev

Structure of Intermediate States in the Photoexcitation of the ⁸⁹Y Isomer

NUCLEAR REACTIONS ⁸⁹Y(γ, γ'), E=2-5 MeV, bremsstrahlung; measured Eγ, Iγ. ⁸⁹Y deduced ground-state, isomer activation transition strengths, T_1/2. Quasiparticle-phonon model calculations. Resonance fluorescence technique.

doi: 10.1016/0375-9474(93)90190-9
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1992CA01      Phys.Rev. C45, 470 (1992)

J.J.Carroll, C.B.Collins, P.von Neumann-Cosel, D.G.Richmond, A.Richter, T.W.Sinor, K.N.Taylor

Reply to ' Comment on ' Resonant Excitation of the Reaction ^180mTa(γ, γ')¹⁸⁰Ta ' '

NUCLEAR REACTIONS ¹⁸⁰Ta(γ, γ'), E ≤ 3.6 MeV; analyzed previous analyses of data; deduced isomer reduced transition probabilities consistency with recommended upper limits.

doi: 10.1103/PhysRevC.45.470
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1992CO19      Phys.Rev. C46, 952 (1992)

C.B.Collins, J.J.Carroll, K.N.Taylor, D.G.Richmond, T.W.Sinor, M.Huber, P.von Neumann-Cosel, A.Richter, W.Ziegler

Common Thresholds and the Role of Deformations in the Photoexcitation of Isomers

NUCLEAR REACTIONS ¹⁶⁷Er, ¹⁷⁹Hf, ¹⁹¹Ir, ¹⁹⁷Au(γ, γ), E=2-6 MeV; measured σ(E), isomer production yield vs E; deduced intermediate states location, deformations role, σ.

doi: 10.1103/PhysRevC.46.952
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1991CA02      Phys.Rev. C43, 897 (1991)

J.J.Carroll, T.W.Sinor, D.G.Richmond, K.N.Taylor, C.B.Collins, M.Huber, N.Huxel, P.von Neumann-Cosel, A.Richter, C.Spieler, W.Ziegler

Excitation of ^123mTe and ^125mTe Through (γ, γ') Reactions

NUCLEAR REACTIONS ^123,125Te(γ, γ'), E=2-6 MeV; measured γ-yield, σ(E); deduced isomer excitation mechanism.

doi: 10.1103/PhysRevC.43.897
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1991CA03      Phys.Rev. C43, 1238 (1991)

J.J.Carroll, M.J.Byrd, D.G.Richmond, T.W.Sinor, K.N.Taylor, W.L.Hodge, Y.Paiss, C.D.Eberhard, J.A.Anderson, C.B.Collins, E.C.Scarbrough, P.P.Antich, F.J.Agee, D.Davis, G.A.Huttlin, K.G.Kerris, M.S.Litz, D.A.Whittaker

Photoexcitation of Nuclear Isomers by (γ, γ') Reactions

NUCLEAR REACTIONS ⁷⁷Se, ⁷⁹Br, ⁸⁷Sr, ⁸⁹Y, ¹¹¹Cd, ^113,115In, ¹¹⁷Sn, ¹²³Te, ^135,137Ba, ¹⁶⁷Er, ¹⁷⁶Lu, ¹⁷⁹Hf, ¹⁹¹Ir, ¹⁹⁵Pt, ¹⁹⁷Au, ¹⁹⁹Hg(γ, γ'), E=0.5-11 MeV; measured partial σ(E); deduced isomer excitation mechanism, intermediate states general characteristics.

doi: 10.1103/PhysRevC.43.1238
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetG4020.

1991VO05      Phys.Rev. C44, 554 (1991)

P.von Neumann-Cosel, A.Richter, J.J.Carroll, C.B.Collins

Comment on ' Resonant and Nonresonant Contributions to the Photoactivation of ¹¹¹Cd '

NUCLEAR REACTIONS, ICPND ⁸⁷Sr(γ, γ'), ¹¹¹Cd(γ, γ'), ^113,115In(γ, γ'), E=radioactive source; calculated lowest intermediate states σ(E); deduced nonresonant contribution.

doi: 10.1103/PhysRevC.44.554
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1991VO08      Phys.Lett. 266B, 9 (1991)

P.von Neumann-Cosel, A.Richter, C.Spieler, W.Ziegler, J.J.Carroll, T.W.Sinor, D.G.Richmond, K.N.Taylor, C.B.Collins, K.Heyde

Resonant Photoexcitation of Isomers. ^115mIn as a Test Case

NUCLEAR REACTIONS, ICPND ¹¹⁵In(γ, γ'), E=2-5 MeV bremsstrahlung; measured isomer yield vs end point energy, Eγ, Iγ; deduced excitation mechanism. Unified model.

doi: 10.1016/0370-2693(91)90736-A
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1990CO24      Phys.Rev. C42, R1813 (1990)

C.B.Collins, J.J.Carroll, T.W.Sinor, M.J.Byrd, D.G.Richmond, K.N.Taylor, M.Huber, N.Huxel, P.von Neumann-Cosel, A.Richter, C.Spieler, W.Ziegler

Resonant Excitation of the Reaction ^180mTa(γ, γ')¹⁸⁰Ta

NUCLEAR REACTIONS ^180mTa(γ, γ'), E=43-76 keV; measured γ spectra; deduced isomer deexcitation mechanism, σ.

doi: 10.1103/PhysRevC.42.R1813
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1989AN07      Nucl.Instrum.Methods Phys.Res. B40/41, 452 (1989)

J.A.Anderson, C.D.Eberhard, M.J.Byrd, J.J.Carroll, C.B.Collins, E.C.Scarbrough, P.P.Antich

Nuclear Photoactivation Cross Sections for Short-Lived Isomeric States Excited with a 6 MeV Linac

NUCLEAR REACTIONS ¹⁶⁷Er, ⁷⁹Br, ¹⁹¹Ir, ¹⁸³W, ¹⁹⁷Au, ⁷⁷Se, ¹³⁷Ba, ⁸⁹Y(γ, γ'), E ≤ 6 MeV bremsstrahlung; measured photoactivation σ.

doi: 10.1016/0168-583X(89)91018-5
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1989CA19      Astrophys.J. 344, 454 (1989)

J.J.Carroll, J.A.Anderson, J.W.Glesener, C.D.Eberhard, C.B.Collins

Accelerated Decay of ^180mTa and ¹⁷⁶Lu in Stellar Interiors through (γ, γ') Reactions

RADIOACTIVITY ^180mTa [from ¹⁸⁰Ta(γ, γ'), E=6 MeV bremsstrahlung]; measured X-ray spectra. ^176mLu [from Lu(γ, γ'), E=6 MeV bremsstrahlung]; measured decay spectra; deduced effective T_1/2 in stellar environment. Model calculations.

NUCLEAR REACTIONS ¹⁸⁰Ta, ¹⁷⁶Lu(γ, γ'), E=6 MeV bremsstrahlung; measured X-ray, decay spectra; deduced isomer excitation σ vs gateway state energy. Model calculations.

doi: 10.1086/167813
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