NSR Query Results

Output year order : Descending
Format : Normal

NSR database version of April 26, 2024.

Search: Author = P.T.Choy

Found 15 matches.

Back to query form

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
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

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 ^{122,123,124,125,127,129}Ce, and ^122,123La.

doi: 10.1103/PhysRevC.86.034303
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

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
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

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
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

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
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

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, 132}Ce

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
Citations: PlumX Metrics

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, 158}Er and strongly deformed structures in ^{173, 174, 175}Hf

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

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, 132}Ce: 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
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

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
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

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
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

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 T_1/2. Jurosphere II array, recoil-isomer tagging.

doi: 10.1103/PhysRevC.66.034308
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

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
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.