NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = P.T.Choy Found 15 matches. 2023SI08 Phys.Rev. C 107, 054305 (2023) J.Simpson, M.A.Riley, A.Pipidis, E.S.Paul, X.Wang, P.J.Nolan, J.F.Sharpey-Schafer, A.Aguilar, D.E.Appelbe, A.D.Ayangeakaa, A.J.Boston, H.C.Boston, D.B.Campbell, M.P.Carpenter, C.J.Chiara, P.T.W.Choy, R.M.Clark, M.Cromaz, A.O.Evans, P.Fallon, U.Garg, A.Gorgen, D.J.Hartley, R.V.F.Janssens, D.T.Joss, D.S.Judson, F.G.Kondev, T.Lauritsen, I.Y.Lee, A.O.Macchiavelli, J.T.Matta, J.Ollier, M.Petri, J.P.Revill, L.L.Riedinger, S.V.Rigby, C.Teal, P.J.Twin, C.Unsworth, D.Ward, S.Zhu, I.Ragnarsson Evolution of structure and shapes in 158Er to ultrahigh spin NUCLEAR REACTIONS 114Cd(48Ca, 4n)158Er, E=215 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ). 158Er; deduced levels, J, π, high-spin states, angular intensity ratios, δ, B(M1/E2) ratios, nuclear shapes, alignments, rotational bands, configurations, band terminating states and feeding, transition quadrupole moments for triaxial strongly deformed bands, moment of inertia. Comparison with cranked Nilsson-Strutinski calculations. Systematics of triaxial strongly deformed bands in 158Er, 160Er, 152Dy, 163Lu. Gammasphere array of escape-suppressed HPGe detectors at 88-inch cyclotron-LBNL and ATLAS-ANL facilities.
doi: 10.1103/PhysRevC.107.054305
2012SM04 Phys.Rev. C 86, 034303 (2012) J.F.Smith, L.J.Angus, E.S.Paul, C.J.Chiara, M.P.Carpenter, H.J.Chantler, P.T.W.Choy, C.N.Davids, M.Devlin, D.B.Fossan, S.J.Freeman, R.V.F.Janssens, N.S.Kelsall, T.Koike, D.R.LaFosse, D.G.Sarantites, D.Seweryniak, K.Starosta, R.Wadsworth, A.N.Wilson γ-ray spectroscopy of neutron-deficient 123Ce NUCLEAR REACTIONS 64Zn(64Zn, nα), E=260 MeV; measured Eγ, Iγ, γγ-, γγ(particle)-coin, γγ(θ)(ADO) using Gammasphere array, Microball array and Neutron Wall at ATLAS facility in ANL. 123Ce; deduced levels, J, π, rotational bands, multipolarity, deformation parameters β2, γ and β4, alignments, configurations. 74Br, 119Ba, 121,122La, 122Ce; measured Eγ, Iγ, γγ-coin, γγ(θ) in nuclei formed in competing channels. Comparison with Total Routhian surface (TRS) and cranked shell-model (CSM) calculations. Systematics of bands and alignments in 122,123,124,125,127,129Ce, and 122,123La.
doi: 10.1103/PhysRevC.86.034303
2009PA17 Phys.Rev. C 79, 044324 (2009) E.S.Paul, S.V.Rigby, M.A.Riley, J.Simpson, D.E.Appelbe, D.B.Campbell, P.T.W.Choy, R.M.Clark, M.Cromaz, A.O.Evans, P.Fallon, A.Gorgen, D.T.Joss, I.Y.Lee, A.O.Macchiavelli, P.J.Nolan, A.Pipidis, D.Ward, I.Ragnarsson Loss of collectivity in the transitional 156Er nucleus at high spin NUCLEAR REACTIONS 114Cd(48Ca, 6n), E=215 MeV; measured Eγ, Iγ, γγ-coin, angular distributions. 156Er; deduced levels, J, π, angular distribution coefficients, bands, multipolarities, B(M1), B(M1)/B(E2), configurations, alignments as a function of rotational frequency. Nilsson-Strutinsky calculations. Potential energy surface calculations. 152Gd, 154Dy, 156Er, 158Yb, 160Hf; level and configuration systematics.
doi: 10.1103/PhysRevC.79.044324
2007PA03 Phys.Rev.Lett. 98, 012501 (2007) E.S.Paul, P.J.Twin, A.O.Evans, A.Pipidis, M.A.Riley, J.Simpson, D.E.Appelbe, D.B.Campbell, P.T.W.Choy, R.M.Clark, M.Cromaz, P.Fallon, A.Gorgen, D.T.Joss, I.Y.Lee, A.O.Macchiavelli, P.J.Nolan, D.Ward, I.Ragnarsson Return of Collective Rotation in 157Er and 158Er at Ultrahigh Spin NUCLEAR REACTIONS 114Cd(48Ca, 4n), (48Ca, 5n), E=215 MeV; measured Eγ, Iγ, γγ-coin. 157,158Er deduced high-spin levels, J, π, configurations, collective rotation above band-terminating states. Gammasphere array, cranked Nilsson-Strutinsky calculations.
doi: 10.1103/PhysRevLett.98.012501
2006EV02 Phys.Rev. C 73, 064303 (2006) A.O.Evans, E.S.Paul, J.Simpson, M.A.Riley, D.E.Appelbe, D.B.Campbell, P.T.W.Choy, R.M.Clark, M.Cromaz, P.Fallon, A.Gorgen, D.T.Joss, I.Y.Lee, A.O.Macchiavelli, P.J.Nolan, A.Pipidis, D.Ward, I.Ragnarsson High-spin structure in 157Er up to and above band termination NUCLEAR REACTIONS 114Cd(48Ca, 5n), E=215 MeV; measured Eγ, Iγ, γγ-coin. 157Er deduced high-spin levels, J, π, configurations, B(M1)/B(E2), band termination. Gammasphere array.
doi: 10.1103/PhysRevC.73.064303
2006PA37 Phys.Scr. T125, 115 (2006) E.S.Paul, P.T.W.Choy, C.Andreoiu, A.J.Boston, A.O.Evans, C.Fox, S.Gros, P.J.Nolan, G.Rainovski, J.A.Sampson, H.C.Scraggs, A.Walker, D.E.Appelbe, D.T.Joss, J.Simpson, J.Gizon, A.Astier, N.Buforn, A.Prevost, N.Redon, O.Stezowski, B.M.Nyako, D.Sohler, J.Timar, L.Zolnai, D.Bazzacco, S.Lunardi, C.M.Petrache, P.Bednarczyk, D.Curien, N.Kintz, I.Ragnarsson The highest spin discrete levels in 131, 132Ce NUCLEAR REACTIONS 100Mo(36S, 4n), (36S, 5n), E=160, 165 MeV; measured Eγ, Iγ, γγ-coin. 131,132Ce deduced superdeformed band transitions. Euroball IV array.
doi: 10.1088/0031-8949/2006/T125/026
2006RI13 Phys.Scr. T125, 123 (2006) M.A.Riley, M.K.Djongolov, A.O.Evans, D.J.Hartley, R.V.F.Janssens, E.S.Paul, A.Pipidis, J.Simpson, A.A.Aguilar, D.E.Appelbe, C.R.Bingham, D.B.Campbell, M.P.Carpenter, P.Chowdhury, P.T.W.Choy, R.M.Clark, M.Cromaz, D.M.Cullen, M.Danchev, G.D.Dracoulis, P.Fallon, A.Gorgen, G.B.Hagemann, D.T.Joss, J.Goon, R.A.Kaye, T.L.Khoo, F.G.Kondev, R.W.Laird, K.Lagergren, T.Lauritsen, A.O.Macchiavelli, B.McClain, E.F.Moore, G.Mukherjee, E.Ngijoi-Yogo, P.J.Nolan, H.I.Park, L.L.Riedinger, G.Sletten, S.K.Tandel, P.M.Walker, D.Ward, I.Ragnarsson, F.Saric, J.Zhang Observation of states beyond band termination in 156, 157, 158Er and strongly deformed structures in 173, 174, 175Hf NUCLEAR REACTIONS 114Cd(48Ca, 4n), (48Ca, 5n), (48Ca, 6n), E=215 MeV; measured Eγ, Iγ, γγ-coin. 156,157,158Er deduced high-spin levels, states above band termination. Gammasphere array. NUCLEAR STRUCTURE 173,174,175Hf; analyzed data; deduced superdeformed bands features.
doi: 10.1088/0031-8949/2006/T125/028
2005LA32 Phys.Rev. C 72, 057303 (2005) K.Lagergren, M.A.Riley, J.Simpson, D.E.Appelbe, P.Bednarczyk, D.B.Campbell, C.Chandler, P.T.W.Choy, D.Curien, D.T.Joss, E.S.Paul Observation of the second proton alignment in 160Tm NUCLEAR REACTIONS 130Te(35Cl, 5n), E=170 MeV; measured Eγ, Iγ, γγ-coin. 160Tm deduced high-spin levels, J, π, configurations. Euroball array.
doi: 10.1103/PhysRevC.72.057303
2005PA30 Phys.Rev. C 71, 054309 (2005) E.S.Paul, P.T.W.Choy, C.Andreoiu, A.J.Boston, A.O.Evans, C.Fox, S.Gros, P.J.Nolan, G.Rainovski, J.A.Sampson, H.C.Scraggs, A.Walker, D.E.Appelbe, D.T.Joss, J.Simpson, J.Gizon, A.Astier, N.Buforn, A.Prevost, N.Redon, O.Stezowski, B.M.Nyako, D.Sohler, J.Timar, L.Zolnai, D.Bazzacco, S.Lunardi, C.M.Petrache, P.Bednarczyk, D.Curien, N.Kintz, I.Ragnarsson Highest spin discrete levels in 131, 132Ce: Spin generation near the mesoscopic limit NUCLEAR REACTIONS 100Mo(36S, 4n), (36S, 5n), E=160, 165 MeV; measured Eγ, Iγ, γγ-coin. 131,132Ce deduced high-spin levels, J, π, superdeformed bands, configurations, band termination features. Euroball IV array, cranked mean-field calculations.
doi: 10.1103/PhysRevC.71.054309
2005RI16 J.Phys.(London) G31, S1735 (2005) M.A.Riley, M.K.Djongolov, A.O.Evans, D.J.Hartley, R.V.F.Janssens, E.S.Paul, J.Simpson, A.A.Aguilar, D.E.Appelbe, C.R.Bingham, D.B.Campbell, M.P.Carpenter, P.Chowdhury, P.T.W.Choy, R.M.Clark, M.Cromaz, D.M.Cullen, M.Danchev, G.D.Dracoulis, P.Fallon, A.Gorgen, G.B.Hagemann, D.T.Joss, J.Goon, R.A.Kaye, T.L.Khoo, F.G.Kondev, R.W.Laird, K.Lagergren, T.Lauritsen, A.O.Macchiavelli, B.McClain, E.F.Moore, G.Mukherjee, E.Ngijoi-Yogo, P.J.Nolan, H.I.Park, A.Pipidis, L.L.Riedinger, G.Sletten, S.K.Tandel, P.M.Walker, D.Ward, I.Ragnarsson, F.Saric, J.Zhang Beyond band termination in 157Er and the search for wobbling excitations in strongly deformed 174Hf NUCLEAR REACTIONS 114Cd(48Ca, 5n), E=215 MeV; measured Eγ, Iγ, γγ-coin. 157Er deduced high-spin levels, J, π, band termination features. Gammasphere array. NUCLEAR STRUCTURE 173,174Hf; analyzed superdeformed band transitions fractional Doppler shifts, transition quadrupole moments.
doi: 10.1088/0954-3899/31/10/064
2005SM07 Phys.Lett. B 625, 203 (2005) J.F.Smith, C.J.Chiara, M.P.Carpenter, H.J.Chantler, P.T.W.Choy, C.N.Davids, M.Devlin, J.L.Durell, D.B.Fossan, S.J.Freeman, R.V.F.Janssens, N.S.Kelsall, T.Koike, D.R.LaFosse, E.S.Paul, P.Reiter, D.G.Sarantites, D.Seweryniak, K.Starosta, R.Wadsworth, A.N.Wilson, P.-H.Heenen First observation of very neutron-deficient 122Ce NUCLEAR REACTIONS 64Zn(64Zn, 2nα), E=260 MeV; measured Eγ, Iγ, γγ-, nγ-, (charged particle)γ-, (recoil)γ-coin. 122Ce deduced levels, J, π, rotational band, angular distribution ratios, transition multipolarities, quadrupole deformation parameter. Microball and Gammasphere arrays, comparison with Woods-Saxon cranking predictions.
doi: 10.1016/j.physletb.2005.08.035
2004EV01 Phys.Rev.Lett. 92, 252502 (2004) A.O.Evans, E.S.Paul, J.Simpson, M.A.Riley, D.E.Appelbe, D.B.Campbell, P.T.W.Choy, R.M.Clark, M.Cromaz, P.Fallon, A.Gorgen, D.T.Joss, I.Y.Lee, A.O.Macchiavelli, P.J.Nolan, A.Pipidis, D.Ward, I.Ragnarsson, F.Saric High-Spin Structure beyond Band Termination in 157Er NUCLEAR REACTIONS 114Cd(48Ca, 5n), E=215 MeV; measured Eγ, Iγ, γγ-coin. 157Er deduced high-spin levels, J, π, configurations, feeding of band-terminating states. Gammasphere array, comparison with cranked mean-field calculations.
doi: 10.1103/PhysRevLett.92.252502
2002CH38 Phys.Rev. C66, 014311 (2002) H.J.Chantler, E.S.Paul, A.J.Boston, M.P.Carpenter, R.Charity, C.J.Chiara, P.T.W.Choy, C.N.Davids, M.Devlin, A.M.Fletcher, D.B.Fossan, D.G.Jenkins, N.S.Kelsall, T.Koike, D.R.LaFosse, P.J.Nolan, D.G.Sarantites, D.Seweryniak, J.F.Smith, K.Starosta, R.Wadsworth, A.N.Wilson Signature Inversion in Doubly Odd 124La NUCLEAR REACTIONS 64Zn(64Zn, n3p), E=260 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-, (neutron)γ-, (recoil)γ-coin. 124La deduced high-spin levels, possible J, π, δ, configurations, signature inversion. Cranked mean-field calculations.
doi: 10.1103/PhysRevC.66.014311
2002CU05 Phys.Rev. C66, 034308 (2002) D.M.Cullen, L.K.Pattison, R.S.Chakrawarthy, D.Dobson, J.L.Durell, S.J.Freeman, D.T.Scholes, C.Scholey, E.S.Paul, P.T.W.Choy, P.T.Greenlees, P.M.Jones, R.Julin, S.Juutinen, A.Keenan, H.Kettunen, P.Kuusiniemi, M.Leino, A.-P.Leppanen, P.Nieminen, J.Pakarinen, P.Rahkila, J.Uusitalo, M.A.Bentley, D.T.Joss Identification of Excited States in Doubly Odd 63140Eu77 by Recoil-Isomer Tagging NUCLEAR REACTIONS 107Ag(36Ar, n2p), E=152, 181 MeV; measured prompt and delayed Eγ, Iγ, γγ-, (recoil)γ-coin; deduced production σ. 140Eu deduced high-spin levels, possible J, π, configurations, isomer T1/2. Jurosphere II array, recoil-isomer tagging.
doi: 10.1103/PhysRevC.66.034308
2002WI10 Phys.Rev. C66, 021305 (2002) A.N.Wilson, D.R.LaFosse, J.F.Smith, C.J.Chiara, A.J.Boston, M.P.Carpenter, H.J.Chantler, R.Charity, P.T.W.Choy, M.Devlin, A.M.Fletcher, D.B.Fossan, R.V.F.Janssens, D.G.Jenkins, N.S.Kelsall, F.G.Kondev, T.Koike, E.S.Paul, D.G.Sarantites, D.Seweryniak, K.Starosta, R.Wadsworth Observation of excited states in the near-drip-line nucleus 125Pr NUCLEAR REACTIONS 64Zn(64Zn, 2np), E=260 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-, (neutron)γ-, (recoil)γ-coin. 125Pr deduced high-spin levels, J, π, configurations. Gammasphere, Microball arrays, mass separator.
doi: 10.1103/PhysRevC.66.021305
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