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NSR database version of April 11, 2024.

Search: Author = P.J.Twin

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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
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2009RI05      Acta Phys.Pol. B40, 513 (2009)

M.A.Riley, A.Aguilar, A.O.Evans, D.J.Hartley, K.Lagergren, J.Ollier, E.S.Paul, A.Pipidis, J.Simpson, C.Teal, P.J.Twin, X.Wang, D.E.Appelbe, D.B.Campbell, M.P.Carpenter, R.M.Clark, M.Cromaz, I.G.Darby, P.Fallon, U.Garg, R.V.F.Janssens, D.T.Joss, F.G.Kondev, T.Lauritsen, I.Y.Lee, C.J.Lister, A.O.Macchiavelli, P.J.Nolan, M.Petri, S.V.Rigby, J.Thompson, C.Unsworth, D.Ward, S.Zhu, I.Ragnarsson

Strongly Deformed Nuclear Shapes at Ultra-High Spin and Shape Coexistence in ∼ 90 Nuclei


2007BE20      Phys.Rev. C 75, 047301 (2007)

G.Benzoni, J.Robin, A.Bracco, F.C.L.Crespi, A.De Conto, S.Leoni, B.Million, D.Montanari, G.Duchene, D.Curien, Th.Byrski, F.A.Beck, P.Bednarczyk, S.Courtin, O.Dorvaux, B.J.P.Gall, P.Joshi, A.Nourreddine, I.Piqueras, J.P.Vivien, P.J.Twin

Selective studies of the excited rotational bands in the superdeformed nucleus 151Tb

NUCLEAR REACTIONS 130Te(27Al, 6n), E=155 MeV; measured Eγ, Iγ, γγ-coin. 151Tb deduced unresolved superdeformed bands, decay-out features. Euroball IV array, comparison with band mixing model predictions.

doi: 10.1103/PhysRevC.75.047301
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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
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2002AP04      Phys.Rev. C66, 044305 (2002)

D.E.Appelbe, P.J.Twin, C.W.Beausang, D.M.Cullen, D.Curien, G.Duchene, S.Erturk, Ch.Finck, B.Haas, E.S.Paul, D.C.Radford, C.Rigollet, M.B.Smith, O.Stezowski, J.C.Waddington, A.N.Wilson

Evidence for triaxial deformation near N = 86: Collective bands in 152, 153Dy and 153Ho

NUCLEAR REACTIONS 120Sn(37Cl, 4n), E=177 MeV; 124Sn(34S, 5n), E=182 MeV; measured Eγ, Iγ, γγ-coin. 153Ho, 153Dy deduced high-spin levels, J, π, configurations, triaxial deformation. Eurogam II array, cranked mean-field calculations.

NUCLEAR STRUCTURE 152Dy; analyzed data; deduced triaxial superdeformed band. Cranked mean-field analysis.

doi: 10.1103/PhysRevC.66.044305
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2001NI13      Phys.Rev. C64, 034313 (2001)

N.Nica, G.Duchene, V.E.Iacob, J.Dudek, F.A.Beck, Th.Byrski, D.Curien, G.de France, B.Haas, B.Kharraja, D.Prevost, C.Petrache, H.Savajols, J.P.Vivien, L.Han, K.Zuber, M.Aiche, M.M.Aleonard, J.F.Chemin, C.W.Beausang, S.Clarke, P.J.Dagnall, M.Smith, P.J.Twin, J.Simpson, M.A.Bentley

High-Spin States in 155Er

NUCLEAR REACTIONS 123Sb(37Cl, 5n), E=193 MeV; measured Eγ, Iγ, γγ-coin, γ-ray polarization. 155Er deduced high-spin levels, J, π, δ, configurations, deformation. Eurogam II array. Tilted-Fermi-surface analysis.

doi: 10.1103/PhysRevC.64.034313
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2000SM03      Phys.Rev. C61, 034314 (2000)

M.B.Smith, D.E.Appelbe, P.J.Twin, C.W.Beausang, F.A.Beck, M.A.Bentley, D.M.Cullen, D.Curien, P.J.Dagnall, G.de France, G.Duchene, S.Erturk, Ch.Finck, B.Haas, I.M.Hibbert, J.C.Lisle, B.M.Nyako, C.D.O'Leary, C.Rigollet, H.Savajols, J.Simpson, O.Stezowski, J.Styczen, J.P.Vivien, K.Zuber

Deformed Rotational Cascades in 152Dy: Further evidence for shape coexistence at high spin

NUCLEAR REACTIONS 124Sn(34S, 6n), E=182 MeV; measured Eγ, Iγ, γγ-coin. 120Sn(36S, 4n), E=168 MeV; measured Eγ, Iγ, γγ-coin, DSA. 152Dy deduced high-spin levels, J, π, T1/2, quadrupole moments, configurations, shape coexistence. Eurogam array. Cranked mean-field calculations.

doi: 10.1103/PhysRevC.61.034314
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1999FI12      Phys.Lett. 467B, 15 (1999)

Ch.Finck, O.Stezowski, N.Kintz, J.P.Vivien, K.Zuber, A.Nourreddine, D.E.Appelbe, C.W.Beausang, F.A.Beck, T.Byrski, S.Courtin, D.Curien, G.de France, G.Duchene, S.Erturk, B.J.P.Gall, B.Haas, N.Khadiri, E.Pachoud, C.Rigollet, M.Smith, Ch.Theisen, P.J.Twin

First Evidence for Linking Transitions between the Superdeformed Yrast Band and the Normal Deformed States in 149Gd

NUCLEAR REACTIONS 124Sn(30Si, 5n), E=158 MeV; measured Eγ, Iγ, γγ-coin. 149Gd deduced high-spin levels, J, π, superdeformed band linking transitions. Eurogam II array.

doi: 10.1016/S0370-2693(99)01139-9
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1998BE06      Phys.Lett. 417B, 13 (1998)

C.W.Beausang, P.Fallon, D.E.Appelbe, S.Asztalos, R.M.Clark, S.Clarke, B.Cederwall, M.A.Deleplanque, R.M.Diamond, S.Erturk, W.Kelly, I.Y.Lee, A.O.Macchiavelli, D.C.Patterson, M.B.Smith, F.S.Stephens, P.J.Twin, A.N.Wilson

Lifetimes of Yrast and Excited Superdeformed State in 150Gd: Effect of particle-hole excitations on the deformation

NUCLEAR REACTIONS 130Te(26Mg, 6n), E=149 MeV; measured Eγ, Iγ, γγ-coin, DSA. 150Gd deduced high-spin levels, superdeformed bands T1/2, quadrupole moments, configurations.

doi: 10.1016/S0370-2693(97)01347-6
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1998BY02      Phys.Rev. C57, 1151 (1998)

Th.Byrski, O.Stezowski, K.Zuber, D.Appelbe, C.W.Beausang, F.A.Beck, A.Bouguettoucha, D.Curien, G.de France, G.Duchene, S.Erturk, C.Finck, B.Gall, B.Haas, A.Z.Kiss, N.Khadiri, B.Kharraja, A.Nourreddine, D.Prevost, H.Savajols, M.Smith, P.J.Twin, J.P.Vivien

Extended Spectroscopy in the Superdeformed Well of 148, 149Gd Nuclei

NUCLEAR REACTIONS 124Sn(30Si, 5n), (30Si, 6n), E=158 MeV; measured Eγ, Iγ, γγ-coin. 148,149Gd deduced high-spin levels J, π, superdeformed bands, configurations.

doi: 10.1103/PhysRevC.57.1151
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1998FI01      Eur.Phys.J. A 2, 123 (1998)

C.Finck, O.Stezowski, F.A.Beck, D.E.Appelbe, T.Byrski, S.Courtin, D.M.Cullen, D.Curien, G.de France, G.Duchene, S.Erturk, B.J.P.Gall, U.Garg, B.Haas, N.Khadiri, B.Kharraja, N.Kintz, A.Nourreddine, D.Prevost, C.Rigollet, H.Savajols, P.J.Twin, J.P.Vivien, K.Zuber

Quadrupole Moment of Superdeformed Bands in 151Tb

NUCLEAR REACTIONS 130Te(27Al, 6n), E=152 MeV; measured Eγ, Iγ, γγ-coin, DSA. 151Tb deduced superdeformed bands transitions T1/2, quadrupole moments, configuration.

doi: 10.1007/s100500050100
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1997AP02      Phys.Rev. C56, 2490 (1997)

D.E.Appelbe, C.W.Beausang, D.M.Cullen, M.B.Smith, P.J.Twin, D.Curien, G.Duchene, C.Finck, B.Kharraja, B.Haas, C.Rigollet, O.Stezowski, A.N.Wilson

Superdeformed Bands in 153Ho

NUCLEAR REACTIONS 120Sn(37Cl, 4n), E=177 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ). 153Ho deduced high-spin, superdeformed levels, band structure, transition multipolarity. Cranked shell model analysis.

doi: 10.1103/PhysRevC.56.2490
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1997AP05      Acta Phys.Hung.N.S. 6, 285 (1997)

D.E.Appelbe, C.W.Beausang, D.M.Cullen, G.Duchene, Ch.Finck, C.Rigollet, M.B.Smith, O.Stezowski, P.J.Twin

Superdeformed Bands in 153Ho

NUCLEAR REACTIONS 120Sn(37Cl, 4n), E=177 MeV; measured Eγ, Iγ, γγ-coin. 153Ho deduced superdeformed bands, configurations.


1997SM11      Acta Phys.Hung.N.S. 6, 305 (1997)

M.B.Smith, D.E.Appelbe, C.W.Beausang, P.J.Twin, S.Asztalos, M.A.Bentley, R.M.Clark, D.M.Cullen, P.J.Dagnall, M.A.Deleplanque, R.M.Diamond, S.Erturk, P.Fallon, Ch.Finck, B.Haas, A.O.Macchiavelli, C.Rigollet, H.Savayols, O.Stezowski

The Search for Hyperdeformation in 152Dy

NUCLEAR REACTIONS 120Sn(37Cl, 4np), E=185, 190 MeV; 124Sn(34S, 6n), E=182 MeV; measured Eγ, Iγ, γγ-coin. 152Dy deduced no clear evidence for hyperdeformed states.


1996FO01      Z.Phys. A354, 169 (1996)

N.Fotiades, S.Harissopulos, C.A.Kalfas, S.Kossionides, C.T.Papadopoulos, R.Vlastou, M.Serris, J.F.Sharpey-Schafer, M.J.Joyce, C.W.Beausang, P.J.Dagnall, P.D.Forsyth, S.J.Gale, P.M.Jones, E.S.Paul, P.J.Twin, J.Simpson, D.M.Cullen, P.Fallon, M.A.Riley, R.M.CLark, K.Hauschild, R.Wadsworth

High Spin Structures in 194Hg

NUCLEAR REACTIONS 150Nd(48Ca, 4n), E=213 MeV; measured γγ-coin. 194Hg deduced high-spin levels, J, π, B(λ) ratios.

doi: 10.1007/s002180050029
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1996SA15      Phys.Rev.Lett. 76, 4480 (1996)

H.Savajols, A.Korichi, D.Ward, D.Applebe, G.C.Ball, C.Beausang, F.A.Beck, T.Byrski, D.Curien, P.Dagnall, G.de France, D.Disdier, G.Duchene, S.Erturk, C.Finck, S.Flibotte, B.Gall, A.Galindo-Uribarri, B.Haas, G.Hackman, V.P.Janzen, B.Kharraja, J.C.Lisle, J.C.Merdinger, S.M.Mullins, S.Pilotte, D.Prevost, D.C.Radford, V.Rauch, C.Rigollet, D.Smalley, M.B.Smith, O.Stezowski, J.Styczen, Ch.Theisen, P.J.Twin, J.P.Vivien, J.C.Waddington, K.Zuber, I.Ragnarsson

Lifetime Measurements of Superdeformed Bands in 148-149Gd and 152Dy: Evidence for structure-dependent elongations

NUCLEAR REACTIONS 124Sn(30Si, 6n), (30Si, 5n), E=158 MeV; 120Sn(36S, 4n), E=170 MeV; measured DSA, γγ-coin. 148,149Gd, 152Dy deduced levels, J, π, band structure deformation features, quadrupole moments, superdeformed bands T1/2.

doi: 10.1103/PhysRevLett.76.4480
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1996TH06      Phys.Rev. C54, 2910 (1996)

Ch.Theisen, N.Khadiri, J.P.Vivien, I.Ragnarsson, C.W.Beausang, F.A.Beck, G.Belier, T.Byrski, D.Curien, G.de France, D.Disdier, G.Duchene, Ch.Finck, S.Flibotte, B.Gall, B.Haas, H.Hanine, B.Herskind, B.Kharraja, J.C.Merdinger, A.Nourreddine, B.M.Nyako, G.E.Perez, D.Prevost, O.Stezowski, V.Rauch, C.Rigollet, H.Savajols, J.Sharpey-Schafer, P.J.Twin, L.Wei, K.Zuber

Favored Neutron Excitations in Superdeformed 147Gd

NUCLEAR REACTIONS 122Sn(30Si, 5n), E=158 MeV; measured Eγ, Iγ, γγ-, high-fold-coin. 147Gd deduced high-spin levels, superdeformed bands, configurations, effective alignments. Nilsson-Strutinsky cranking model calculations. Compton suppressed Ge detectors EUROGAM array.

doi: 10.1103/PhysRevC.54.2910
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1995BE20      J.Phys.(London) G21, L21 (1995)

M.A.Bentley, C.W.Beausang, P.J.Twin, P.J.Dagnall, A.Atac, F.A.Beck, Th.Byrski, S.Clarke, D.M.Curien, G.Duchene, G.de France, P.D.Forsyth, B.Herskind, B.Haas, J.C.Lisle, B.M.Nyako, J.Nyberg, E.S.Paul, J.Simpson, J.Styczen, J.P.Vivien, K.Zuber

Search for Linking Transitions between the Superdeformed and Normal Deformed States in 152Dy

NUCLEAR REACTIONS 108Pd(48Ca, 4n), E=200 MeV; measured γγγ-coin, Eγ, Iγ. 152Dy deduced superdeformed, normal deformed high-spin states linking transitions evidence.

doi: 10.1088/0954-3899/21/4/001
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1995BE65      Nucl.Instrum.Methods Phys.Res. A364, 560 (1995)

C.W.Beausang, D.Prevost, M.H.Bergstrom, G.de France, B.Haas, J.C.Lisle, Ch.Theisen, J.Timar, P.J.Twin, J.N.Wilson

Using High-Fold Data from the New Generation of γ-Ray Detector Arrays

NUCLEAR REACTIONS 124Sn(30Si, 5n), E=162 MeV; 124Sn(34S, 6n), E=182 MeV; measured γγ-coin spectra; deduced data analysis associated problems. High efficiency γ-ray spectrometers.

doi: 10.1016/0168-9002(95)00438-6
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1995FA09      Phys.Rev. C52, 93 (1995)

P.Fallon, C.W.Beausang, S.Asztalos, D.Nisius, R.V.F.Janssens, M.Bergstrom, M.Carpenter, B.Cederwall, S.Clarke, B.Crowell, M.A.Deleplanque, R.M.Diamond, R.G.Henry, T.L.Khoo, T.Lauritsen, I.Y.Lee, A.O.Macchiavelli, F.S.Stephens, P.J.Twin

Proton and Neutron Excitations in Superdeformed 150Tb

NUCLEAR REACTIONS 124Sn(31P, 5n), E=167 MeV; measured Eγ-Eγ-coin. 150Tb deduced levels, J, π, superdeformed bands.

doi: 10.1103/PhysRevC.52.93
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1995FL01      Nucl.Phys. A584, 373 (1995)

S.Flibotte, G.Hackman, I.Ragnarsson, Ch.Theisen, H.R.Andrews, G.C.Ball, C.W.Beausang, F.A.Beck, G.Belier, M.A.Bentley, T.Byrski, D.Curien, G.de France, D.Disdier, G.Duchene, B.Haas, D.S.Haslip, V.P.Janzen, P.M.Jones, B.Kharraja, J.A.Kuehner, J.C.Lisle, J.C.Merdinger, S.M.Mullins, E.S.Paul, D.Prevost, D.C.Radford, V.Rauch, J.F.Smith, J.Styczen, P.J.Twin, J.P.Vivien, J.C.Waddington, D.Ward, K.Zuber

Multi-Particle Excitations in the Superdeformed 149Gd Nucleus

NUCLEAR REACTIONS 124Sn(30Si, 5n), E=158 MeV; measured Eγ, Iγ, γn-coin. 149Gd deduced high-spin levels, J, π, superdeformed bands. Compton-suppressed hyperpure Ge detector array. Nilsson-Strutinsky cranking model calculations.

doi: 10.1016/0375-9474(94)00450-2
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1995KH06      Phys.Lett. 341B, 268 (1995)

B.Kharraja, T.Byrski, F.A.Beck, C.W.Beausang, M.A.Bentley, D.Curien, P.J.Dagnall, G.Duchene, S.Flibotte, G.de France, Zs.Fulop, B.Haas, A.Z.Kiss, J.C.Lisle, C.M.Petrache, Ch.Theisen, P.J.Twin, J.P.Vivien, K.Zuber

Unfavoured Signature Partner Superdeformed Bands Associated with Proton Excitations in 151Tb

NUCLEAR REACTIONS 130Te(27Al, X), E=154 MeV; measured Eγ, multiplicities. 151Tb deduced high-spin superdeformed bands, configurations. Self-consistent relativistic Hartree-Fock model comparison.

doi: 10.1016/0370-2693(94)01345-D
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1995NI06      Phys.Lett. 346B, 15 (1995)

D.Nisius, R.V.F.Janssens, P.Fallon, B.Crowell, I.Ahmad, C.W.Beausang, M.P.Carpenter, B.Cederwall, P.J.Daly, M.A.Deleplanque, R.M.Diamond, D.Gassmann, Z.W.Grabowski, R.G.Henry, T.L.Khoo, T.Lauritsen, I.Y.Lee, A.O.Macchiavelli, R.H.Mayer, F.S.Stephens, P.J.Twin

' Identical ' Superdeformed Band in 151Dy: Further evidence for the pseudospin coupling scheme

NUCLEAR REACTIONS 122Sn(34S, 5n), E=175 MeV; measured Eγ, Iγ, γγγ-coin. 151Dy deduced high-spin levels, J, π, superdeformed band.

doi: 10.1016/0370-2693(95)00013-B
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1995PE16      Phys.Scr. T56, 299 (1995)

C.M.Petrache, G.Duchene, C.W.Beausang, F.A.Beck, T.Byrski, D.Curien, P.J.Dagnall, S.Flibotte, P.D.Forsyth, G.de France, B.Haas, B.Kharraja, A.Kiss, J.C.Merdinger, D.Prevost, C.Schuck, C.Theisen, P.J.Twin, J.P.Vivien

Decay Out of Superdeformed Bands in Tb Isotopes

NUCLEAR REACTIONS 130Te(27Al, xn), E=154 MeV; measured Eγ, Iγ, γγ-coin. 152Tb deduced high-spin levels, J, π. 150,151Tb deduced high-spin levels, J, π, superdeformed band decay features.

doi: 10.1088/0031-8949/1995/T56/054
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1995TW01      Nucl.Phys. A583, 199c (1995)

P.J.Twin

New Insights into Superdeformed Nuclei with EUROGAM

NUCLEAR STRUCTURE 151,152,153Dy, 150,151Tb, 149,150Gd; analyzed data; deduced ΔI=4 staggering in superdeformed bands.

doi: 10.1016/0375-9474(94)00659-B
Citations: PlumX Metrics


1995TW02      Phys.Scr. T56, 23 (1995)

P.J.Twin

Evidence for Shell Closure at Superdeformed Shape

NUCLEAR STRUCTURE 151,152,153Dy, 150,151Tb, 149,150Gd; compiled, reviewed yrast superdeformed band dynamic moments of inertia, other data aspects; deduced particle-hole excitations role in superdeformed bands.

doi: 10.1088/0031-8949/1995/T56/003
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1994DA17      J.Phys.(London) G20, 1591 (1994)

P.J.Dagnall, C.W.Beausang, R.M.Clark, R.Wadsworth, S.Bhattacharjee, P.Fallon, P.D.Forsyth, D.B.Fossan, G.de France, S.J.Gale, F.Hannachi, K.Hauschild, I.M.Hibbert, H.Hubel, P.M.Jones, M.J.Joyce, A.Korichi, W.Korten, D.R.LaFosse, E.S.Paul, H.Schnare, K.Starosta, J.F.Sharpey-Schafer, P.J.Twin, P.Vaska, M.P.Waring, J.N.Wilson

Oblate Bands in A ≈ 200 Bismuth Nuclei

NUCLEAR REACTIONS 186W(19F, 5n), (19F, 6n), (19F, 7n), E=115, 105 MeV; 198Pt(11B, 6n), (11B, 5n), E=74 MeV; measured γγ-coin. 198,199,200,203,204Bi deduced high-spin levels, J, π, band structure.


1994DA20      Phys.Lett. 335B, 313 (1994)

P.J.Dagnall, C.W.Beausang, P.J.Twin, M.A.Bentley, F.A.Beck, Th.Byrski, S.Clarke, D.Curien, G.Duchene, G.de France, P.D.Forsyth, B.Haas, J.C.Lisle, E.S.Paul, J.Simpson, J.Styczen, J.P.Vivien, J.N.Wilson, K.Zuber

Excited Bands in the Doubly-Magic Superdeformed 152Dy Nucleus: Evidence for the first N = 7 proton hyper-intruder orbital

NUCLEAR REACTIONS 108Pd(48Ca, 4n), E=200 MeV; measured γγ-coin, Eγ, Iγ. 152Dy deduced high-spin levels, J, π, superdeformed bands, configurations.

doi: 10.1016/0370-2693(94)90356-5
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1994DE33      Phys.Lett. 331B, 290 (1994)

G.de France, B.Haas, I.Ragnarsson, P.J.Twin, C.W.Beausang, F.A.Beck, T.Byrski, S.Clarke, D.Curien, P.J.Dagnall, G.Duchene, P.Fallon, S.Flibotte, S.Forbes, P.D.Forsyth, B.Kharraja, J.C.Lisle, J.C.Merdinger, C.M.Petrache, D.Prevost, J.F.Sharpey-Schafer, J.Simpson, J.P.Vivien, K.Zuber

Neutron Excitations Across the N = 86 Superdeformed Shell Gap

NUCLEAR STRUCTURE 149Gd, 152,151Tb, 152Dy; analyzed Eγ data; deduced superdeformed high-spin bands features.

doi: 10.1016/0370-2693(94)91054-5
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1994DU13      Z.Phys. A350, 39 (1994)

G.Duchene, C.M.Petrache, C.W.Beausang, F.A.Beck, T.Byrski, D.Curien, P.J.Dagnall, S.Flibotte, P.D.Forsyth, G.de France, B.Haas, B.Kharraja, J.C.Merdinger, D.Prevost, C.Schuck, C.Theisen, P.J.Twin, J.P.Vivien

High Spin States in the Nucleus 150Tb

NUCLEAR REACTIONS 130Te(27Al, 7n), E=154 MeV; measured γγ-coin. 150Tb deduced high-spin levels, J, π, configurations, yrast superdeformed band decay features. Deformed independent particle model.


1994FA13      Phys.Rev.Lett. 73, 782 (1994)

P.Fallon, C.W.Beausang, S.Clarke, P.J.Twin, F.A.Beck, Th.Byrski, D.Curien, P.J.Dagnall, G.de France, G.Duchene, P.D.Forsyth, B.Haas, M.J.Joyce, A.O.Macchiavelli, E.S.Paul, J.F.Sharpey-Schafer, J.Simpson, J.P.Vivien, S.Aberg, W.Nazarewicz

Pair Excitaions and a Proton Band Crossing in Superdeformed 150Gd

NUCLEAR REACTIONS 130Te(26Mg, 6n), E=149 MeV; measured γγ-coin. 150Gd deduced superdeformed high-spin band, configuration, dynamic moments of inertia, relative Iγ.

doi: 10.1103/PhysRevLett.73.782
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1994PE17      Nucl.Phys. A579, 285 (1994)

C.M.Petrache, G.Duchene, B.Kharraja, C.W.Beausang, F.A.Beck, T.Byrski, D.Curien, P.Dagnall, S.Flibotte, P.D.Forsyth, G.de France, B.Haas, A.Kiss, J.C.Merdinger, D.Prevost, C.Schuck, C.Theisen, P.J.Twin, J.P.Vivien

Detailed Level Scheme of 151Tb and the Feeding of the Normal-Deformed States by the Superdeformed Bands

NUCLEAR REACTIONS 130Te(27Al, 6n), E=154 MeV; measured Eγ, Iγ, γγ-coin, γ(θ). 151Tb deduced high-spin levels, J, π, configurations, band structure, deformations, decay out of superdeformed bands. Enriched targets, Compton-suppressed hyperpure Ge detector array EUROGAM. Deformed independent particle model calculations.

doi: 10.1016/0375-9474(94)90807-9
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1994TW01      Nucl.Phys. A574, 51c (1994)

P.J.Twin

Extreme Deformations at High Spin

NUCLEAR STRUCTURE 151,152,153Dy, 149,150Gd, 151,150Tb; compiled, reviewed moment of inertia vs average rotational frequency, other features. Other nuclei, aspects included, extreme deformations at high spins.

doi: 10.1016/0375-9474(94)90038-8
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1994TW02      Nuovo Cim. 107A, 1145 (1994)

P.J.Twin

Superdeformed Nuclei

NUCLEAR STRUCTURE A=150-189; compiled, reviewed data on superdeformed levels, systematics.

doi: 10.1007/BF02730862
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1993BE37      Phys.Rev.Lett. 71, 1800 (1993)

C.W.Beausang, P.Fallon, S.Clarke, F.A.Beck, Th.Byrski, D.Curien, P.J.Dagnall, G.de France, G.Duchene, P.D.Forsyth, B.Haas, M.J.Joyce, A.O.Macchiavelli, E.S.Paul, J.F.Sharpey-Schafer, J.Simpson, P.J.Twin, J.P.Vivien

Degnerate Superdeformed States in 150Gd

NUCLEAR REACTIONS 130Te(26Mg, 6n), E=149 MeV; measured γγγ-coin. 150Gd deduced levels, J, π, superdeformed state degeneracy features.

doi: 10.1103/PhysRevLett.71.1800
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1993CU06      Phys.Rev.Lett. 71, 2559 (1993)

D.Curien, G.de France, C.W.Beausang, F.A.Beck, T.Byrski, S.Clark, P.Dagnall, G.Duchene, S.Flibotte, S.Forbes, P.D.Forsyth, B.Haas, M.A.Joyce, B.Kharraja, B.M.Nyako, C.Schuck, J.Simpson, C.Theisen, P.J.Twin, J.P.Vivien, L.Zolnai

Deexcitation from Superdeformed Bands in 151Tb and Neighboring A ≈ 150 Nuclei

NUCLEAR REACTIONS 130Te(27Al, 6n), E=154 MeV; measured Eγ, Iγ, γγγ-coin. 151Tb deduced superdeformed band transition energies, relative Iγ, decay mechanism features.

doi: 10.1103/PhysRevLett.71.2559
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1993DA04      J.Phys.(London) G19, 465 (1993)

P.J.Dagnall, C.W.Beausang, P.Fallon, P.D.Forsyth, E.S.Paul, J.F.Sharpey-Schafer, P.J.Twin, I.Ali, D.M.Cullen, M.J.Joyce, G.Smith, R.Wadsworth, R.M.Clark, P.H.Regan, A.Astier, M.Meyer, N.Redon

Coexistence of Collective Oblate and Superdeformed Prolate Shapes in 196Pb

NUCLEAR REACTIONS 184W(16O, 4n), E=98 MeV; 186W(16O, 6n), E=120 MeV; measured γγ-coin. 196Pb deduced levels, J, π, collective oblate, superdeformed prolate band coexistence.

doi: 10.1088/0954-3899/19/3/014
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1993FL03      Phys.Rev.Lett. 71, 688 (1993)

S.Flibotte, G.Hackman, Ch.Theisen, H.R.Andrews, G.C.Ball, C.W.Beausang, F.A.Beck, G.Belier, M.A.Bentley, T.Byrski, D.Curien, G.de France, D.Disdier, G.Duchene, P.Fallon, B.Haas, V.P.Janzen, P.M.Jones, B.Kharraja, J.A.Kuehner, J.C.Lisle, J.C.Merdinger, S.M.Mullins, E.S.Paul, D.Prevost, D.C.Radford, V.Rauch, J.F.Smith, J.Styczen, P.J.Twin, J.P.Vivien, J.C.Waddington, D.Ward, K.Zuber

Multiparticle Excitations and Identical Bands in Superdeformed 149Gd Nucleus

NUCLEAR REACTIONS 124Sn(30Si, 5n), E=158 MeV; measured γγ-coin. 149Gd deduced levels, J, π, superdeformed bands.

doi: 10.1103/PhysRevLett.71.688
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1993FL07      Phys.Rev.Lett. 71, 4299 (1993)

S.Flibotte, H.R.Andrews, G.C.Ball, C.W.Beausang, F.A.Beck, G.Belier, T.Byrski, D.Curien, P.J.Dagnall, G.de France, D.Disdier, G.Duchene, Ch.Finck, B.Haas, G.Hackman, D.S.Haslip, V.P.Janzen, B.Kharraja, J.C.Lisle, J.C.Merdinger, S.M.Mullins, W.Nazarewicz, D.C.Radford, V.Rauch, H.Savajols, J.Styczen, Ch.Theisen, P.J.Twin, J.P.Vivien, J.C.Waddington, D.Ward, K.Zuber, S.Aberg

ΔI = 4 Bifurcation in a Superdeformed Band: Evidence for a C4 symmetry

NUCLEAR REACTIONS 124Sn(30Si, 5n), E=158 MeV; measured Eγ, Iγ, γγ-coin. 149Gd deduced yrast superdeformed band moment of inertia, evidence for fourfold rotational symmetry.

doi: 10.1103/PhysRevLett.71.4299
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1993JO09      Phys.Rev.Lett. 71, 2176 (1993)

M.J.Joyce, J.F.Sharpey-Schafer, P.J.Twin, C.W.Beausang, D.M.Cullen, M.A.Riley, R.M.Clark, P.J.Dagnall, I.Deloncle, J.Duprat, P.Fallon, P.D.Forsyth, N.Fotiades, S.J.Gale, B.Gall, F.Hannachi, S.Harissopulos, K.Hauschild, P.M.Jones, C.A.Kalfas, A.Korichi, Y.Le Coz, M.Meyer, E.S.Paul, M.G.Porquet, N.Redon, C.Schuck, J.Simpson, R.Vlastou, R.Wadsworth

First Measurement of Magnetic Properties in a Superdeformed Nucleus: 193Hg

NUCLEAR REACTIONS 150Nd(48Ca, 5n), E=213 MeV; measured γγ-coin. 193Hg deduced levels, J, π, B(λ), M1/E2 branching ratios, superdeformed bands linking, g factor. Strong coupling model.

doi: 10.1103/PhysRevLett.71.2176
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1993TW01      Nucl.Phys. A557, 3c (1993)

P.J.Twin

EUROGAM and Superdeformation in A = 150 Nuclei

NUCLEAR STRUCTURE 152Dy, 151Tb; compiled, reviewed EUROGAM data on superdeformed bands.

doi: 10.1016/0375-9474(93)90527-5
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1992BE09      Nucl.Instrum.Methods Phys.Res. A313, 37 (1992)

C.W.Beausang, S.A.Forbes, P.Fallon, P.J.Nolan, P.J.Twin, J.N.Mo, J.C.Lisle, M.A.Bentley, J.Simpson, F.A.Beck, D.Curien, G.de France, G.Duchene, D.Popescu

Measurements on Prototype Ge and BGO Detectors for the Eurogam Array

RADIOACTIVITY 60Co(β-); 207Bi(EC), (β+); measured unsuppressed γ-spectra. Prototype Ge, bismuth-germanate detectors.

NUCLEAR REACTIONS 100Mo(34S, X), E=132 MeV; measured unsuppressed γ-spectra. Prototype Ge, bismuth-germanate detectors.

doi: 10.1016/0168-9002(92)90084-H
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1992SM01      Phys.Rev.Lett. 68, 158 (1992)

G.Smith, B.Haas, A.Alderson, I.Ali, C.W.Beausang, M.A.Bentley, P.Dagnall, P.Fallon, G.de France, P.D.Forsyth, U.Huttmeier, P.Romain, D.Santos, P.J.Twin, J.P.Vivien

Entrance-Channel Effects in the Population of Superdeformed Bands

NUCLEAR REACTIONS 74Ge(82Se, 4n), E=324-346 MeV; 108Pd(48Ca, 4n), E=205 MeV; 120Sn(36S, 4n), E=175 MeV; measured γγ-coin. 152Dy deduced superdeformed band population entrance channel effects.

doi: 10.1103/PhysRevLett.68.158
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1991BE12      J.Phys.(London) G17, 481 (1991)

M.A.Bentley, A.Alderson, G.C.Ball, H.W.Cranmer-Gordon, P.Fallon, B.Fant, P.D.Forsyth, B.Herskind, D.Howe, C.A.Kalfas, A.R.Mokhtar, J.D.Morrison, A.H.Nelson, B.M.Nyako, K.Schiffer, J.F.Sharpey-Schafer, J.Simpson, G.Sletten, P.J.Twin

Gamma-Ray Spectroscopy of Superdeformed States in the Nucleus 152Dy

NUCLEAR REACTIONS 108Pd(48Ca, 4n), E=205 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ), DSA. 152Dy deduced levels, J, π, superdeformed band, intrinsic T1/2, quadrupole moment. Microscopic structure, Nilsson, Woods-Saxon models comparison, Monte Carlo simulations.

doi: 10.1088/0954-3899/17/4/009
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1991CU01      Phys.Rev.Lett. 67, 1175 (1991)

D.M.Cullen, M.A.Riley, A.Alderson, I.Ali, C.W.Beausang, T.Bengtsson, M.A.Bentley, P.Fallon, P.D.Forsyth, F.Hanna, S.M.Mullins, W.Nazarewicz, R.J.Poynter, P.H.Regan, J.W.Roberts, W.Satula, J.F.Sharpey-Schafer, J.Simpson, G.Sletten, P.J.Twin, R.Wadsworth, R.Wyss

Cullen et al. Reply:

NUCLEAR STRUCTURE 193Hg; analyzed data; deduced superdeformed states features.

doi: 10.1103/PhysRevLett.67.1175
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1991FA07      Phys.Lett. 257B, 269 (1991)

P.Fallon, A.Alderson, I.Ali, D.M.Cullen, P.D.Forsyth, M.A.Riley, J.W.Roberts, J.F.Sharpey-Schafer, P.J.Twin, M.A.Bentley, A.M.Bruce

The Collectivity and the De-Excitation of the Yrast Superdeformed Band in 150Gd

NUCLEAR REACTIONS 130Te(26Mg, 6n), E=145 MeV; measured γγ-coin spectra, DSA. 150Gd deduced levels, J, π, deformation, superdeformation, band structure, quadrupole moment.

doi: 10.1016/0370-2693(91)91891-X
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1991TW01      Nucl.Phys. A522, 13c (1991)

P.J.Twin

Superdeformed Nuclei at High Spin

NUCLEAR STRUCTURE 152Dy, 151Tb, 150Gd, 152Eu; analyzed data; deduced superdeformed band evidence. Other data reviewed.

doi: 10.1016/0375-9474(91)90049-C
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1990BY01      Phys.Rev.Lett. 64, 1650 (1990)

T.Byrski, F.A.Beck, D.Curien, C.Schuck, P.Fallon, A.Alderson, I.Ali, M.A.Bentley, A.M.Bruce, P.D.Forsyth, D.Howe, J.W.Roberts, J.F.Sharpey-Schafer, G.Smith, P.J.Twin

Observation of Identical Superdeformed Bands in N = 86 Nuclei

NUCLEAR REACTIONS 130Te(26Mg, 6n), E=145 MeV; 130Te(27Al, 6n), E=150 MeV; measured γγ-coin, sum spectra. 150Gd, 151Tb deduced levels, J, π, superdeformed band structure.

doi: 10.1103/PhysRevLett.64.1650
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1990CU05      Phys.Rev.Lett. 65, 1547 (1990)

D.M.Cullen, M.A.Riley, A.Alderson, I.Ali, C.W.Beausang, T.Bengtsson, M.A.Bentley, P.Fallon, P.D.Forsyth, F.Hanna, S.M.Mullins, W.Nazarewicz, R.J.Poynter, P.H.Regan, J.W.Roberts, W.Satula, J.F.Sharpey-Schafer, J.Simpson, G.Sletten, P.J.Twin, R.Wadsworth, R.Wyss

Landau-Zener Crossing in Superdeformed 193Hg: Evidence for octupole correlations in superdeformed nuclei

NUCLEAR REACTIONS 150Nd(48Ca, 5n), E=205, 213 MeV; measured Eγ, Iγ, γγ-coin. 193Hg deduced levels, J, π, superdeformed band structure, shape features.

doi: 10.1103/PhysRevLett.65.1547
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1990CU06      Nucl.Phys. A520, 105c (1990)

D.M.Cullen, M.A.Riley, A.Alderson, I.Ali, T.Bengtsson, M.A.Bentley, A.M.Bruce, P.Fallon, P.D.Forsyth, F.Hanna, S.M.Mullins, W.Nazarewicz, R.Poynter, P.Regan, J.W.Roberts, W.Satula, J.F.Sharpey-Schafer, J.Simpson, G.Sletten, P.J.Twin, R.Wadsworth, R.Wyss

Evidence for Octupole Softness of the Superdeformed Shape from Band Interactions in 193,194Hg

NUCLEAR REACTIONS 150Nd(48Ca, 4n), E=205 MeV; 150Nd(48Ca, 5n), E=213 MeV; measured γγ-coin. 193,194Hg deduced levels, J, π, superdeformed band structure.

doi: 10.1016/0375-9474(90)91137-G
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1990NA08      Phys.Rev.Lett. 64, 1654 (1990)

W.Nazarewicz, P.J.Twin, P.Fallon, J.D.Garrett

Natural-Parity States in Superdeformed Bands and Pseudo SU(3) Symmetry at Extreme Conditions

NUCLEAR STRUCTURE 151Tb, 152Dy, 150Gd; analyzed level schemes, superdeformed bands; deduced pseudo SU(3) symmetry features.

doi: 10.1103/PhysRevLett.64.1654
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1990RI05      Nucl.Phys. A512, 178 (1990)

M.A.Riley, D.M.Cullen, A.Alderson, I.Ali, P.Fallon, P.D.Forsyth, F.Hanna, S.M.Mullins, J.W.Roberts, J.F.Sharpey-Schafer, P.J.Twin, R.Poynter, R.Wadsworth, M.A.Bentley, A.M.Bruce, J.Simpson, G.Sletten, W.Nazarewicz, T.Bengtsson, R.Wyss

Multiple Superdeformed Bands in 194Hg and Their Dynamical Moments of Inertia

NUCLEAR REACTIONS 150Nd(48Ca, 4n), E=205 MeV; measured Eγ, Iγ, γγ-coin. 194Hg deduced levels, J, π, rotational, superdeformed band characteristics. Enriched targets, Ge detectors, array of anti-Compton spectrometers, 4π bismuth germanate ball. Cranked Woods-Saxon and Nilsson model calculations.

doi: 10.1016/0375-9474(90)90010-J
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1990TW02      Nucl.Phys. A520, 17c (1990)

P.J.Twin

Superdeformation - An Experimental Overview

COMPILATION A=152; compiled, reviewed data on superdeformation.

doi: 10.1016/0375-9474(90)91131-A
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1989FA02      Phys.Lett. 218B, 137 (1989)

P.Fallon, P.Alderson, M.A.Bentley, A.M.Bruce, P.D.Forsyth, D.Howe, J.W.Roberts, J.F.Sharpey-Schafer, P.J.Twin, F.A.Beck, T.Byrski, D.Curien, C.Schuck

Superdeformed Bands in 150Gd and 151Tb: Evidence for the influence of high-N intruder states at large deformations

NUCLEAR REACTIONS 130Te(26Mg, 6n), E=145 MeV; 130Te(27Al, 6n), E=150 MeV; measured γγ-coin, γγ(θ). 150Gd, 151Tb deduced levels, J, π, superdeformed band structure, shapes, moments of inertia.

doi: 10.1016/0370-2693(89)91408-1
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1988BR34      Phys.Lett. 215B, 237 (1988)

A.M.Bruce, J.J.Gaardhoje, B.Herskind, R.Chapman, J.C.Lisle, F.Khazaie, J.N.Mo, P.J.Twin

Angular Momentum Dependence of Giant Dipole Vibrations in Hot Dysprosium Nuclei

NUCLEAR REACTIONS 108Pd(48Ca, X), E=206 MeV; measured Eγ, Iγ, γ-anisotropy. 156Dy deduced GDR parameters.

doi: 10.1016/0370-2693(88)91426-8
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1988NO10      Ann.Rev.Nucl.Part.Sci. 38, 533 (1988)

P.J.Nolan, P.J.Twin

Superdeformed Shapes at High Angular Momentum

NUCLEAR STRUCTURE 152Dy, 132Ce; compiled, evaluated superdeformed states data. Other aspects, other nuclei included.

doi: 10.1146/annurev.ns.38.120188.002533
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1987BE41      Phys.Rev.Lett. 59, 2141 (1987)

M.A.Bentley, G.C.Ball, H.W.Cranmer-Gordon, P.D.Forsyth, D.Howe, A.R.Mokhtar, J.D.Morrison, J.F.Sharpey-Schafer, P.J.Twin, B.Fant, C.A.Kalfas, A.H.Nelson, J.Simpson, G.Sletten

Intrinsic Quadrupole Moment of the Superdeformed Band in 152Dy

NUCLEAR REACTIONS 108Pd(48Ca, 4n), E=205 MeV; measured Eγ, Iγ, DSA. 152Dy deduced levels, J, effective T1/2, band characteristics, superdeformed quadrupole moment, moment of inertia.

doi: 10.1103/PhysRevLett.59.2141
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1987LO05      Phys.Rev.Lett. 58, 1585 (1987)

D.J.G.Love, P.J.Nolan, P.J.Twin

Love et al Respond

NUCLEAR REACTIONS 92Zr(64Ni, xn), E not given; measured γγ-coin; calculated γ-spectra. 154Er deduced transitions.

doi: 10.1103/PhysRevLett.58.1585
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1986LO09      Phys.Rev.Lett. 57, 551 (1986)

D.J.G.Love, P.J.Bishop, A.Kirwan, P.J.Nolan, D.J.Thornley, A.H.Nelson, P.J.Twin

Entrance- and Exit-Channel Effects and the Suppression of Neutron Emission from 64Ni + 92Zr → 156Er

NUCLEAR REACTIONS 92Zr(64Ni, xn), E=236 MeV; measured Eγ, Iγ for x=1, 2, 3; deduced entrance, exit channel effects. 156Er deduced neutron emission characteristics.

doi: 10.1103/PhysRevLett.57.551
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1986NY02      Phys.Rev.Lett. 56, 2680 (1986)

B.M.Nyako, J.Simpson, P.J.Twin, D.Howe, P.D.Forsyth, J.F.Sharpey-Schafer

Coexistence of Prolate and Oblate Structures up to Spin 40(h-bar) in 152Dy

NUCLEAR REACTIONS 108Pd(48Ca, 4n), E=205 MeV; measured γγ-coin. 152Dy deduced levels, J, π, γ-branching, band structure, backbending, shape coexistence.

doi: 10.1103/PhysRevLett.56.2680
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1986TW01      Phys.Rev.Lett. 57, 811 (1986)

P.J.Twin, B.M.Nyako, A.H.Nelson, J.Simpson, M.A.Bentley, H.W.Cranmer-Gordon, P.D.Forsyth, D.Howe, A.R.Mokhtar, J.D.Morrison, J.F.Sharpey-Schafer, G.Sletten

Observation of Discrete-Line Superdeformed Band up to 60(h-bar) in 152Dy

NUCLEAR REACTIONS 108Pd(48Ca, 4n), E=205 MeV; measured Eγ, Iγ, γγ-energy correlation, γγ-coin. 152Dy deduced levels, J, π, γ-branching, yrast sequence, band structure, deformation, superdeformation characteristics.

doi: 10.1103/PhysRevLett.57.811
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1985LO06      Phys.Rev.Lett. 54, 1361 (1985)

D.J.G.Love, A.H.Nelson, P.J.Nolan, P.J.Twin

Measurement of In-Band Transition Probabilities at High Spin

NUCLEAR REACTIONS 98Mo(36S, 4n), E=155 MeV; measured γγ-energy correlation. 130Ce deduced inband stretched E2 transition average probability.

doi: 10.1103/PhysRevLett.54.1361
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1985NO02      J.Phys.(London) G11, L17 (1985)

P.J.Nolan, A.Kirwan, D.J.G.Love, A.H.Nelson, D.J.Unwin, P.J.Twin

A Shape Change along the Yrast Line in 132Ce

NUCLEAR REACTIONS 100Mo(36S, 4n), E=150 MeV; measured γγ-coin, Eγ, Iγ. 132Ce deduced levels, yrast, rotational bands, J, π, γ-branching, shape change.

doi: 10.1088/0305-4616/11/1/004
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1985NO04      Phys.Rev.Lett. 54, 2211 (1985)

P.J.Nolan, D.J.G.Love, A.Kirwan, D.J.Unwin, A.H.Nelson, P.J.Twin, J.D.Garrett

High Angular Momentum Components in the Subbarrier Fusion of Heavy Ions

NUCLEAR REACTIONS 80Se(80Se, xn), E=225-310 MeV; measured γγ-coin, γ-multiplicity for x=2, 3, 4; deduced fusion σ vs L.

doi: 10.1103/PhysRevLett.54.2211
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1985SM07      J.Phys.(London) G11, 1271 (1985)

P.J.Smith, D.J.Unwin, A.Kirwan, D.J.G.Love, A.H.Nelson, P.J.Nolan, D.M.Todd, P.J.Twin

High-Spin Structures in 127La and 129La

NUCLEAR REACTIONS 115In(16O, 4n), E=85 MeV; 98Mo(36S, 4np), E=155 MeV; measured Eγ, Iγ(θ), γγ-coin, DSA, linear polarization, recoil. 127La deduced levels, J, π, T1/2, band crossing, B(λ), spin alignments, Routhians. 129La deduced levels, band crossings, spin alignments, Routhians. Ge detectors, escape suppression shields, bismuth germanate sum-energy multiplicity detector, enriched target. Cranked shell model.

doi: 10.1088/0305-4616/11/11/011
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1985TW01      Phys.Rev.Lett. 55, 1380 (1985)

P.J.Twin, A.H.Nelson, B.M.Nyako, D.Howe, H.W.Cranmer-Gordon, D.Elenkov, P.D.Forsyth, J.K.Jabber, J.F.Sharpey-Schafer, J.Simpson, G.Sletten

Collectivity of the Superdeformed Bands in 152Dy

NUCLEAR REACTIONS 108Pd(48Ca, 4n), E=210 MeV; measured γγ-energy correlation. 152Dy deduced rotational band transition T1/2, collectivity, superdeformed prolate shape.

doi: 10.1103/PhysRevLett.55.1380
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1984AR13      J.Phys.(London) G10, 955 (1984)

R.Aryaeinejad, D.J.G.Love, A.H.Nelson, P.J.Nolan, P.J.Smith, D.M.Todd, P.J.Twin

Band Crossing and Triaxiality in 129Ce

NUCLEAR REACTIONS 116Sn(16O, 3n), 117Sn(16O, 4n), E=73-85 MeV; measured Eγ, Iγ, γ(θ), γγ-coin. 129Ce deduced levels, J, π, γ-branching, δ(E2/M1), band structure, (g(k)-g(R)/Q0) vs rotational frequency, shape characteristics. Escape suppression shields, enriched target. Cranked shell model comparison.

doi: 10.1088/0305-4616/10/7/011
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1984NY01      Phys.Rev.Lett. 52, 507 (1984)

B.M.Nyako, J.R.Cresswell, P.D.Forsyth, D.Howe, P.J.Nolan, M.A.Riley, J.F.Sharpey-Schafer, J.Simpson, N.J.Ward, P.J.Twin

Observation of Superdeformation in 152Dy

NUCLEAR REACTIONS 108Pd(48Ca, 4n), E=205 MeV; measured γγ-energy correlation. 152Dy deduced dynamical moment of inertia, rotational behavior, deformation, superdeformation characteristics. Bismuth germanate, escape suppressed Ge detectors.

doi: 10.1103/PhysRevLett.52.507
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1984NY04      ATOMKI Kozlem. 26, 99 (1984)

B.M.Nyako, J.F.Sharpey-Schafer, R.Aryaeinejad, J.R.Cresswell, P.D.Forsyth, D.Howe, P.J.Nolan, M.A.Riley, J.Simpson, P.J.Twin, J.Bacelar, J.D.Garrett, G.B.Hagemann, B.Herskind, A.Holm

Gamma-Gamma Energy Correlation Study of 158,160Er Nuclei

NUCLEAR REACTIONS 114,116Cd(48Ca, 4n), E=205, 210 MeV; measured γγ-coin, energy correlation spectra. 158,160Er deduced shape characteristics, dynamical moment of inertia, deformation parameters, levels, J, π. Cranked shell model comparison.


1984RI04      Phys.Lett. 135B, 275 (1984)

M.A.Riley, J.Simpson, R.Aryaeinejad, J.R.Cresswell, P.D.Forsyth, D.Howe, P.J.Nolan, B.M.Nyako, J.F.Sharpey-Schafer, P.J.Twin, J.Bacelar, J.D.Garrett, G.B.Hagemann, B.Herskind, A.Holm

The Systematics of h11/2 Proton Alignment in 157,158,159Er

NUCLEAR REACTIONS 114Cd(48Ca, xn), E=200 MeV; measured Eγ, Iγ, γ(θ), γ-multiplicity. 157,158,159Er deduced levels, J, π, yrast sequence, rotational bands, quadrupole deformation, alignment effects.

doi: 10.1016/0370-2693(84)90390-3
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1984TO10      J.Phys.(London) G10, 1407 (1984)

D.M.Todd, R.Aryaeinejad, D.J.G.Love, A.H.Nelson, P.J.Nolan, P.J.Smith, P.J.Twin

Rotational Band Structures and Lifetime Measurements in 130Ce

NUCLEAR REACTIONS 116,118Sn(18O, 4n), E=82 MeV; 117Sn(16O, 3n), E=75.5 MeV; measured Eγ, Iγ(θ), γγ-coin, γγ(t), DSA, recoil. 130Ce deduced levels, J, π, δ, γ-branching, T1/2, band crossings, spin alignments, γ-multipolarity, B(E2). Enriched targets, Ge detectors, escape suppression shields. Cranked shell model comparison.

doi: 10.1088/0305-4616/10/10/012
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1984TW01      Nuovo Cim. 81A, 219 (1984)

P.J.Twin, P.J.Nolan, R.Aryaeinejad, D.J.G.Love, A.H.Nelson, A.Kirwan

First Experiments with TESSA at Daresbury

NUCLEAR REACTIONS 100Mo(34S, 4n), E=150 MeV; measured γγ-coin, γγ-energy correlation. 130Ce deduced levels, J, π. Total energy suppression shield array.

doi: 10.1007/BF02724166
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1983NO07      Phys.Lett. 128B, 285 (1983)

P.J.Nolan, R.Aryaeinejad, A.H.Nelson, D.J.G.Love, D.M.Todd, P.J.Twin

The Moment of Inertia of 130Ce above Spin 30(h-bar)

NUCLEAR REACTIONS 100Mo(34S, 4n), E=150 MeV; measured γγ-coin, Eγ, Iγ. 130Ce deduced levels, J, π, yrast, isomer band transitions, rotational band structure, neutron alignment, moment of inertia. Cranked shell model comparison.

doi: 10.1016/0370-2693(83)90261-7
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1983NO09      Phys.Scr. T5, 153 (1983)

P.J.Nolan, R.Aryaeinejad, D.J.G.Love, A.H.Nelson, P.J.Smith, D.M.Todd, P.J.Twin, J.D.Garrett, G.B.Hagemann, B.Herskind

Electromagnetic Transitions in 130Ce

NUCLEAR REACTIONS 118Sn(16O, 4n), E=85 MeV; 117Sn(16O, 3n), E=75 MeV; measured γγ-coin, DSA, recoil. 130Ce deduced levels, J, π, yrast state T1/2, γ-branching, B(E2), B(M1)/B(E2) ratio for isomer band, (γ) deformation.

doi: 10.1088/0031-8949/1983/T5/028
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1982NO02      Phys.Lett. 108B, 269 (1982)

P.J.Nolan, D.M.Todd, P.J.Smith, D.J.G.Love, P.J.Twin, O.Andersen, J.D.Garrett, G.B.Hagemann, B.Herskind

The Influence of h11/2 Protons in the First Backbends in 130,131Ce

RADIOACTIVITY 127La, 130,131Ce [from 115In, 116,117,118Sn(16O, X), (18O, X), E=75-85 MeV]; measured γγ-coin. 130,131Ce deduced yrast levels, J, π, backbending, h11/2 proton alignment. 127La deduced levels, J, π. Enriched In, Sn targets.

doi: 10.1016/0370-2693(82)91190-X
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1982SM01      J.Phys.(London) G8, 281 (1982)

P.J.Smith, L.P.Ekstrom, F.Kearns, P.J.Twin, N.J.Ward

Gamma-Ray Spectroscopy of 61Zn and a Planar Germanium Polarimeter System

NUCLEAR REACTIONS 58Ni(α, nγ), E=10.75-16 MeV; measured γγ-, nγ-coin, γγ(θ), linear polarization, σ(Eγ). 61Zn deduced levels, J, π, δ, γ-branching ratios. Enriched target, Ge(Li) detector, planar polarimeter. Shell model.

doi: 10.1088/0305-4616/8/2/014
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1193.


1981EK01      J.Phys.(London) G7, 85 (1981)

L.P.Ekstrom, G.D.Jones, F.Kearns, T.P.Morrison, A.Nilsson, V.Paar, P.J.Twin, R.Wadsworth, E.Wallander, N.J.Ward

Gamma-Ray Spectroscopy on 87Sr and the Energy-B(E2) Rule

NUCLEAR REACTIONS 84Kr(α, nγ), E=11-17 MeV; measured γ(θ), γγ-coin, linear polarizations, DSA, σ(Eγ). 87Sr deduced levels, J, π, δ, T1/2, B(λ). Enriched target, Ge(Li) detectors. Generalized vibrator model.

doi: 10.1088/0305-4616/7/1/013
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1981WA09      J.Phys.(London) G7, 815 (1981)

N.J.Ward, L.P.Ekstrom, G.D.Jones, F.Kearns, T.P.Morrison, O.M.Mustaffa, D.N.Simister, P.J.Twin, R.Wadsworth

Gamma-ray Studies of 62Zn

NUCLEAR REACTIONS 58Ni(6Li, np), E=15-24 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), linear polarization, DSA, recoil. 62Zn deduced levels, J, π, δ, T1/2, γ-branching. Enriched target, Ge(Li) detectors. Shell model, interacting boson approximation model.

doi: 10.1088/0305-4616/7/6/014
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1981WA10      Nucl.Phys. A361, 387 (1981)

E.Wallander, A.Nilsson, L.P.Ekstrom, G.D.Jones, F.Kearns, T.P.Morrison, H.G.Price, P.J.Twin, R.Wadsworth, N.J.Ward

States in 89Sr Excited by the 86Kr(α, n)89Sr Reaction

NUCLEAR REACTIONS 86Kr(α, nγ), E=12-16 MeV; measured Eγ, Iγ(E), Iγ(θγ), γγ-coin, linear polarization, DSA. 89Sr deduced levels, J, π, δ, T1/2, B(λ). Enriched solid 86Kr targets, Ge(Li) detectors.

doi: 10.1016/0375-9474(81)90641-2
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1822.


1980EK03      J.Phys.(London) G6, 1415 (1980)

L.P.Ekstrom, G.D.Jones, F.Kearns, T.P.Morrison, A.Nilsson, P.J.Twin, R.Wadsworth, E.Wallander, N.J.Ward

Lifetime and Linear Polarization Measurements with the 80Kr(α, nγ)83Sr and 82Kr(α, nγ)85Sr Reactions

NUCLEAR REACTIONS 80Kr(α, nγ), 82Kr(α, 2nγ), 82Kr(α, nγ), E=14, 18 MeV; measured γ(θ), linear polarizations, DSA. 83,84,85Sr levels deduced J, π, δ, T1/2, transitions rates. Enriched solid 80,82Kr targets, Ge(Li)detectors.

doi: 10.1088/0305-4616/6/11/013
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2158.


1980JO11      Nucl.Instrum.Methods 178, 581 (1980)

G.D.Jones, L.P.Ekstrom, F.Kearns, T.P.Morrison, P.J.Twin, R.Wadsworth, N.J.Ward, B.Collinge, C.L.Wilkinson

An On-Line Computer Controlled Time Digitizer for Half-Life Measurements

NUCLEAR REACTIONS 74Ge(d, n), E=7 MeV; measured γγ-coin. 75As level deduced T1/2. On-line computerized digitizer.

RADIOACTIVITY 38K(IT) [from 24Mg(16O, np), E=38 MeV]; 24Na(IT) [from 23Na(d, p), E=4 MeV]; 77Se(IT) [from 74Ge(α, n), E=16 MeV]; 71Ge(EC) [from 70Ge(d, p), E=6 MeV]; 73As(EC), 77As(β-) [from 72,76Ge(d, n), E=6, 7 MeV]; measured T1/2. On-line computerized digitizer.

doi: 10.1016/0029-554X(80)90841-1
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1980KE06      J.Phys.(London) G6, 1131 (1980)

F.Kearns, L.P.Ekstrom, G.D.Jones, T.P.Morrison, O.M.Mustaffa, H.G.Price, D.N.Simister, P.J.Twin, R.Wadsworth, N.J.Ward

Heavy-Ion Gamma-Ray Spectroscopy of 60Ni

NUCLEAR REACTIONS 56Fe(7Li, 2npγ), E=14-24 MeV; measured nγ-, γγ-coin, γ(θ), linear polarization, DSA, recoil. 60Ni deduced levels J, π, δ, T1/2, transition rates. Enriched target, Ge(Li), neutron scintillation detectors.

doi: 10.1088/0305-4616/6/9/010
Citations: PlumX Metrics


1980SI02      J.Phys.(London) G6, 81 (1980)

D.N.Simister, L.P.Ekstrom, G.D.Jones, F.Kearns, T.P.Morrison, O.M.Mustaffa, H.G.Price, P.J.Twin, R.Wadsworth, N.J.Ward

Gamma-Ray Studies in 64Zn: Levels Above 3.1 MeV

NUCLEAR REACTIONS 61Ni(α, nγ), E=8.6, 9.35 MeV; 56Fe(11B, 2npγ), E=30 MeV; measured γγ-, nγ-coin, Eγ, Iγ(θ), DSA, linear polarization. 64Zn deduced levels, J, π, δ, T1/2, γ-branching. Shell model, cluster vibration, interacting boson models. Ge(Li) detectors, enriched targets.

doi: 10.1088/0305-4616/6/1/015
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1980WA19      J.Phys.(London) G6, 1403 (1980)

R.Wadsworth, L.P.Ekstrom, G.D.Jones, F.Kearns, T.P.Morrison, P.J.Twin, N.J.Ward

Gamma-Ray Studies on the Neutron-Deficient Isotope 70Se

NUCLEAR REACTIONS 58Ni(14N, pnγ), E=36 MeV; 60Ni(12C, 2nγ), E=34 MeV; measured nγ-, γγ-coin, γ(θ), linear polarizations. 70Se levels deduced J, π, δ, γ-branchings. Enriched targets, Ge(Li)detectors.

doi: 10.1088/0305-4616/6/11/012
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1979EK01      Nucl.Instrum.Methods 158, 243 (1979)

L.P.Ekstrom, A.M.Al-Naser, P.R.G.Lornie, P.J.Twin

Spin-Alignment Attenuation Factors in Mass 61-67 Nuclei Populated by (α, n) and (α, p) Reactions

COMPILATION A=61-67; compiled, evaluated data on Iγ(θ) for E2 transitions observed in (α, n), (α, p); deduced spin-alignment attenuation factors α2, α4.


1979EK03      J.Phys.(London) G5, 803 (1979)

L.P.Ekstrom, G.D.Jones, F.Kearns, T.P.Morrison, O.M.Mustaffa, D.N.Simister, H.G.Price, P.J.Twin, R.Wadsworth, N.J.Ward

Gamma-Ray Spectroscopy on 48Cr

NUCLEAR REACTIONS 36Ar(14N, npγ), E=28-36 MeV; 40Ca(10B, npγ), E=24 MeV; measured γγ-coin, γ(θ), linear polarizations, DSA, RDM. 48Cr deduced levels, J, π, δ, T1/2, transition rates. Enriched 36Ar target. Shell model intepretation.

doi: 10.1088/0305-4616/5/6/008
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1979MO22      J.Phys.(London) G5, 1751 (1979)

T.P.Morrison, G.D.Jones, L.P.Ekstrom, F.Kearns, A.Kogan, P.R.G.Lornie, O.Mustaffa, H.G.Price, D.N.Simister, P.J.Twin, R.Wadsworth

Coulomb-Nuclear Interference in the (7Li, 7Li) Reactions

NUCLEAR REACTIONS 46,48Ti(7Li, 7Li'), E=17 MeV; 58Ni(7Li, 7Li'), E=19 MeV; measured σ(θ); deduced optical potentials. DWBA analyses.

doi: 10.1088/0305-4616/5/12/014
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2156.


1979MU08      J.Phys.(London) G5, 1283 (1979); see 79Mu09

O.M.Mustaffa, L.P.Ekstrom, G.D.Jones, F.Kearns, T.P.Morrison, H.G.Price, D.N.Simister, P.J.Twin, R.Wadsworth, N.J.Ward

Gamma-Ray Spectroscopy in 63Zn and 63Cu

doi: 10.1088/0305-4616/5/9/012
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1979MU09      J.Phys.(London) G5, 1283 (1979)

O.M.Mustaffa, L.P.Ekstrom, G.D.Jones, F.Kearns, T.P.Morrison, H.G.Price, D.N.Simister, P.J.Twin, R.Wadsworth, N.J.Ward

Gamma-Ray Spectroscopy in 63Zn and 63Cu

NUCLEAR REACTIONS 60Ni(α, nγ), (α, pγ), E=9.5-19.0 MeV; 54Fe(11B, npγ), (11B, 2pγ), E=30 MeV; 58Ni(7Li, npγ), E=20 MeV; measured γγ-coin, Iγ(θ), linear polarizations, RDM, DSA. 63Zn, 63Cu levels deduced J, π, δ, T1/2, γ-branching ratios. Enriched targets, Ge(Li) detectors. Shell-model calculations.

doi: 10.1088/0305-4616/5/9/012
Citations: PlumX Metrics


1979WA23      J.Phys.(London) G5, 1761 (1979)

R.Wadsworth, L.P.Ekstrom, G.D.Jones, F.Kearns, T.P.Morrison, O.M.Mustaffa, H.G.Price, P.J.Twin, N.J.Ward

A Study of the Neutron-Deficient Isotope 66Ge

NUCLEAR REACTIONS 58Ni(10B, np), E=28.5, 29, 30 MeV; measured nγ-, γγ-coin, Iγ(θ), linear polarizations, RDM. 66Ge levels deduced J, π, δ, T1/2, γ-branchings. Enriched targets.

doi: 10.1088/0305-4616/5/12/015
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1978KO11      J.Phys.(London) G4, 755 (1978)

A.Kogan, P.R.G.Lornie, G.D.Jones, M.R.Nixon, H.G.Price, R.Wadsworth, P.J.Twin

Gamma-Ray Studies of the Odd-Parity States in Zn Isotopes. I. 65Zn

NUCLEAR REACTIONS 62Ni(α, nγ), E=8.0-14.0 MeV; measured γγ-coin, γ(θ), linear polarization, DSA. 65Zn deduced levels, J, π, δ, T1/2, γ-branching. Enriched target, Ge(Li) detectors. Phonon-quasiparticle-coupling, shell-model calculations.

doi: 10.1088/0305-4616/4/5/010
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2117.


1978LO06      J.Phys.(London) G4, 923 (1978)

P.R.G.Lornie, A.Kogan, G.D.Jones, M.R.Nixon, H.G.Price, R.Wadsworth, P.J.Twin

Gamma-Ray Studies of the Odd-Parity States in Zn Isotopes. II. Levels Below 2.0 MeV in Excitation Energy in 67Zn

NUCLEAR REACTIONS 64Ni(α, nγ), E=6.5-17.0 MeV; measured γγ-coin, γ(θ), linear polarization, DSA. 67Zn deduced levels, J, π, δ, T1/2, γ-branching. Enriched targets, Ge(Li) detectors.

doi: 10.1088/0305-4616/4/6/021
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2119.


1978MU02      J.Phys.(London) G4, 99 (1978)

O.M.Mustaffa, A.Kogan, G.D.Jones, P.R.G.Lornie, T.P.Morrison, H.G.Price, D.N.Simister, P.J.Twin, R.Wadsworth

Nuclear Spectroscopy in 63Zn: States below 1.5 MeV

NUCLEAR REACTIONS 60Ni(α, nγ), E=8-16 MeV; measured Eγ, Iγ(E, θ), γγ-coin, linear polarization, DSA. 63Zn levels deduced T1/2, J, π, λ, δ, γ-branching. Enriched target, Ge(Li) detectors.

doi: 10.1088/0305-4616/4/1/011
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2114.


1978PR02      J.Phys.(London) G4, 707 (1978)

H.G.Price, G.D.Jones, P.R.G.Lornie, P.J.Twin, R.Wadsworth

High Spin States in 42Ca

NUCLEAR REACTIONS 39K(α, pγ), E=9.5, 16.0 MeV; measured σ(Eγ), polarization, Doppler shift. 42Ca levels deduced J, π, T1/2, δ.

doi: 10.1088/0305-4616/4/5/007
Citations: PlumX Metrics


1978SI02      J.Phys.(London) G4, 111 (1978)

D.N.Simister, G.D.Jones, A.Kogan, P.R.G.Lornie, T.P.Morrison, O.M.Mustaffa, H.G.Price, P.J.Twin, R.Wadsworth

Gamma Ray Spectroscopy in 64Zn-Levels below 3.1 MeV in Excitation

NUCLEAR REACTIONS 61Ni(α, nγ), E=7.8 MeV; measured Eγ, Iγ(θ), linear polarization, DSA. 64Zn deduced levels, J, π, T1/2, λ, δ. Enriched targets, Ge(Li) detectors.

doi: 10.1088/0305-4616/4/1/012
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2115.


1978SI10      J.Phys.(London) G4, 1127 (1978)

D.N.Simister, G.D.Jones, F.Kearns, A.Kogan, P.R.G.Lornie, T.P.Morrison, O.M.Mustaffa, H.G.Price, P.J.Twin, R.Wadsworth

Quasi-Band Structure in 64Zn

NUCLEAR REACTIONS 61Ni(α, nγ), E=9.35 MeV; 56Fe(11B, 2npγ), E=30 MeV; measured γ(θ), DSA, linear polarization, σ(Eγ). 64Zn deduced levels, J, π, T1/2, γ-branching, B(λ). Enriched targets, Ge(Li) detectors. Shell model.

doi: 10.1088/0305-4616/4/7/017
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1977LO03      J.Phys.(London) G3, 493 (1977)

P.R.G.Lornie, A.Kogan, G.D.Jones, M.R.Nixon, H.G.Price, R.Wadsworth, P.J.Twin

Further Evidence for Particle-Vibration Coupling among the Positive Parity States of 65,67Zn

NUCLEAR REACTIONS 62,64Ni(α, nγ), E=6.5-17.0 MeV; measured σ(E, Eγ, θ), γγ-coin, linear polarization, DSA. 65,67Zn deduced levels, J, π, T1/2, δ, γ-branching, λ. Enriched targets, Ge(Li) detectors.

doi: 10.1088/0305-4616/3/4/011
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1977WA03      J.Phys.(London) G3, 35 (1977)

R.Wadsworth, A.Kogan, P.R.G.Lornie, M.R.Nixon, H.G.Price, P.J.Twin

Gamma Ray Spectroscopy in 61Ni - Levels below 2.2 MeV in Excitation

NUCLEAR REACTIONS 58Fe(α, nγ), E=6.5-13 MeV; measured σ(E, Eγ, θ), γγ-coin, linear polarization, DSA. 61Ni deduced levels, J, π, δ, γ-branching, T1/2. Enriched targets, Ge(Li) detectors. Shell model calculations.

doi: 10.1088/0305-4616/3/1/007
Citations: PlumX Metrics


1977WA07      J.Phys.(London) G3, 833 (1977)

R.Wadsworth, G.D.Jones, A.Kogan, P.R.G.Lornie, T.Morrison, O.Mustaffa, H.G.Price, D.Simister, P.J.Twin

Gamma Ray Spectroscopy in 61Ni-Levels Above 2.2 MeV in Excitation

NUCLEAR REACTIONS 53Cr(11B, 2npγ), E=30 MeV; 58Fe(α, nγ), E=6.5-13.0 MeV; measured γγ-coin, linear polarization, γ(θ), DSA. 61Ni deduced levels, J, π, T1/2, δ, γ-branching. Enriched targets, Ge(Li) detectors, shell-model calculations.

doi: 10.1088/0305-4616/3/6/014
Citations: PlumX Metrics


1977WA15      J.Phys.(London) G3, 1377 (1977)

R.Wadsworth, G.D.Jones, A.Kogan, P.R.G.Lornie, T.Morrison, O.Mustaffa, H.G.Price, D.N.Simister, P.J.Twin

Lifetimes in 61Ni Measured by the Recoil Distance Technique

NUCLEAR REACTIONS 58Fe(α, nγ), E=9.0 MeV; measured recoil distance. 61Ni levels deduced T1/2. Enriched targets, Ge(Li) detectors. Shell model comparison.

doi: 10.1088/0305-4616/3/10/012
Citations: PlumX Metrics


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