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NSR database version of April 11, 2024.

Search: Author = R.J.Poynter

Found 19 matches.

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1997IB01      Nucl.Phys. A619, 213 (1997)

R.W.Ibbotson, C.A.White, T.Czosnyka, P.A.Butler, N.Clarkson, D.Cline, R.A.Cunningham, M.Devlin, K.G.Helmer, T.H.Hoare, J.R.Hughes, G.D.Jones, A.E.Kavka, B.Kotlinski, R.J.Poynter, P.H.Regan, E.G.Vogt, R.Wadsworth, D.L.Watson, C.Y.Wu

Quadrupole and Octupole Collectivity in 148Nd

NUCLEAR REACTIONS 148Nd(58Ni, 58Ni), E=200 MeV; measured (projectile)(recoil)-coin, (projectile)γ-coin following Coulomb excitation. 148Nd(92Mo, 92Mo'), E=330 MeV; measured (projectile)γ-coin following Coulomb excitation. 208Pb(148Nd, 148Nd'), E=700 MeV; measured Eγ, Iγ, γ multiplicity following Coulomb excitation. 148Nd levels deduced B(λ), shape, collectivity related features.

doi: 10.1016/S0375-9474(97)00145-0
Citations: PlumX Metrics


1995FA19      Phys.Scr. T56, 245 (1995)

B.Fant, B.Cederwall, J.Cederkall, L.O.Norlin, R.Wyss, P.Fallon, C.W.Beausang, P.A.Butler, J.W.Roberts, A.M.Bruce, D.M.Cullen, S.M.Mullins, R.J.Poynter, R.Wadsworth, M.A.Riley, W.Korten, M.J.Piiparinen

Shell Structure and Shape Coexistence in 195Pb

NUCLEAR REACTIONS 164Dy(36S, 5n), E=170 MeV; 164Dy(36S, 4n), E=160 MeV; measured Eγ, Iγ, γγ-coin, DCO ratios. 195Pb deduced high-spin levels, J, π, dipole bands, γ-multipolarity, deformation, shape related features.

doi: 10.1088/0031-8949/1995/T56/039
Citations: PlumX Metrics


1995VA22      Phys.Rev. C52, 1270 (1995)

P.Vaska, C.W.Beausang, D.B.Fossan, J.R.Hughes, R.Ma, E.S.Paul, R.J.Poynter, P.H.Regan, R.Wadsworth, S.A.Forbes, S.M.Mullins, P.J.Nolan

High-Spin Structure of 139Eu

NUCLEAR REACTIONS 92Mo(50Cr, 3p), E=220 MeV; measured Eγ, Iγ, γγ(θ). 139Eu deduced high-spin levels, J, π, band structures, configuration. Total routhian surface, cranked shell model calculations.

doi: 10.1103/PhysRevC.52.1270
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1993IB01      Phys.Rev.Lett. 71, 1990 (1993)

R.Ibbotson, C.A.White, T.Czosnyka, P.A.Butler, N.Clarkson, D.Cline, R.A.Cunningham, M.Devlin, K.G.Helmer, T.H.Hoare, J.R.Hughes, G.D.Jones, A.E.Kavka, B.Kotlinski, R.J.Poynter, P.Regan, E.G.Vogt, R.Wadsworth, D.L.Watson, C.Y.Wu

Octupole Collectivity in the Ground Band of 148Nd

NUCLEAR REACTIONS 148Nd(58Ni, 58Ni'), E=200 MeV; 148Nd(92Mo, 92Mo'), E=330 MeV; measured (particle)γ-, γγ(particle)-coin following Coulomb excitation. 208Pb(148Nd, 148Nd'), E=700 MeV; measured (particle)γ-coin, γ yields, γ-multiplicity following Coulomb excitation. 148Nd deduced levels, γ-multipolarity, multipole matrix elements, band collectivity features.

doi: 10.1103/PhysRevLett.71.1990
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1993PA07      J.Phys.(London) G19, 861 (1993)

E.S.Paul, S.Davis, P.Vaska, P.J.Bishop, S.A.Forbes, D.B.Fossan, Y.-J.He, J.R.Hughes, I.Jenkins, Y.Liang, R.Ma, M.S.Metcalfe, S.M.Mullins, P.J.Nolan, R.J.Poynter, P.H.Regan, R.Wadsworth, N.Xu

Prolate and Oblate Rotational Bands in 136Sm

NUCLEAR REACTIONS 92Mo(50Cr, 2pα), E=220 MeV; measured γγ-coin, γγ(θ), Iγ ratios. 136Sm deduced levels, J, π, rotational bands. Other data input.

NUCLEAR STRUCTURE 134,136,138Sm; calculated total Routhian surface, alignments, dynamic moments of inertia. Cranked Woods-Saxon model.

doi: 10.1088/0954-3899/19/6/007
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1993RU05      Phys.Rev. C48, 2078 (1993)

S.L.Rugari, R.H.France III, B.J.Lund, Z.Zhao, M.Gai, P.A.Butler, V.A.Holliday, A.N.James, G.D.Jones, R.J.Poynter, R.J.Tanner, K.L.Ying, J.Simpson

Broken Reflection Symmetry in 114Xe

NUCLEAR REACTIONS 60Ni(58Ni, 2n2p), E=243 MeV; measured γγ-, γn-, γnn-, γ(recoil)-coin, γ(θ). 114Xe deduced levels, J, π, B(λ), ratios, enhanced E1 transitions, broken reflection symmetry evidence.

doi: 10.1103/PhysRevC.48.2078
Citations: PlumX Metrics


1992PA04      J.Phys.(London) G18, 121 (1992)

E.S.Paul, S.A.Forbes, D.B.Fossan, J.Gizon, J.R.Hughes, S.M.Mullins, M.S.Metcalfe, P.J.Nolan, R.J.Poynter, P.H.Regan, G.Smith, R.Wadsworth

Quadrupole Moment of the i13/2 Intruder Band in 139Gd

NUCLEAR REACTIONS 92Mo(50Cr, n2p), E=220 MeV; measured γ-sum spectra, DSA, centroid shifts. 139Gd deduced levels, intruder band configuration, deformation, intrinsic quadrupole moment.

doi: 10.1088/0954-3899/18/1/010
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1992RE05      J.Phys.(London) G18, 847 (1992)

P.H.Regan, R.Wadsworth, S.M.Mullins, J.Nyberg, A.Atac, S.A.Forbes, D.B.Fossan, Y.-J.He, J.R.Hughes, I.Jenkins, R.Ma, M.S.Metcalfe, P.J.Nolan, E.S.Paul, R.J.Poynter, D.Santonicio, A.Virtanen, N.Xu

Measurement of the Intrinsic Quadrupole Moments in the νi13/2 Bands of 135,137Sm

NUCLEAR REACTIONS 92Mo(46Ti, n2p), E=210 MeV; 104Pd(37Cl, 3np), E=168 MeV; measured γγ-coin, DSA. 137Sm deduced levels, J, π, T1/2, deformation parameter β2, quadrupole moments, band structure. 135Sm deduced levels, J, π, T1/2, deformation parameter β2, quadrupole moments, band structure, superdeformation features.

doi: 10.1088/0954-3899/18/5/013
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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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1991FA05      J.Phys.(London) G17, 319 (1991)

B.Fant, R.J.Tanner, P.A.Butler, A.N.James, G.D.Jones, R.J.Poynter, C.A.White, K.L.Ying, D.J.G.Love, J.Simpson, K.A.Connell

Search for Shape Coexistence in 194Pb

NUCLEAR REACTIONS 162Dy(36S, 4n), E=155 MeV; 150Sm(48Ca, 4n), E=200 MeV; measured Eγ, Iγ, I(ce), γ(θ), γγ(θ), γγ-coin, γ-multiplicity. 194Pb deduced levels, J, π. Enriched targets, Ge, Si(Li) detectors, array of anti-Compton spectrometers, BGO ball.

doi: 10.1088/0954-3899/17/3/013
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1991MU08      Phys.Rev.Lett. 66, 1677 (1991)

S.M.Mullins, R.A.Wyss, P.Fallon, T.Byrski, D.Curien, S.A.Forbes, Y.-J.He, M.S.Metcalfe, P.J.Nolan, E.S.Paul, R.J.Poynter, P.H.Regan, R.Wadsworth

Superdeformation and Double Blocking in 142Eu

NUCLEAR REACTIONS 110Pd(37Cl, 5n), E=160 MeV; measured γγ-coin sum spectra. 142Eu deduced levels, superdeformed band.

doi: 10.1103/PhysRevLett.66.1677
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1991PA04      J.Phys.(London) G17, 605 (1991)

E.S.Paul, R.Ma, C.W.Beausang, S.A.Forbes, D.B.Fossan, J.Gizon, J.R.Hughes, Y.Liang, S.M.Mullins, P.J.Nolan, W.F.Piel, Jr., R.J.Poynter, P.H.Regan, R.Wadsworth, N.Xu

Electromagnetic Properties of N = 75 Isotones: Evidence for triaxiality at low spin

NUCLEAR REACTIONS 92Mo(50Cr, n2p), E=220 MeV; measured γγ-coin, γγ(θ). 120Sn(16O, 3n), E=69 MeV; measured γ(θ). 133Ce, 139Gd deduced levels, J, π, δ, B(λ) ratios, shape features. Other nuclei data included.

doi: 10.1088/0954-3899/17/5/009
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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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1990HU04      Nucl.Phys. A512, 275 (1990)

J.R.Hughes, R.Tolle, J.de Boer, P.A.Butler, C.Gunther, V.Grafen, N.Gollwitzer, V.E.Holliday, G.D.Jones, C.Lauterbach, M.Marten-Tolle, S.M.Mullins, R.J.Poynter, R.S.Simon, N.Singh, R.J.Tanner, R.Wadsworth, D.L.Watson, C.A.White

Octupole Correlations in 225Th

NUCLEAR REACTIONS 226Ra(α, 5n), E=50 MeV; measured Eγ, Iγ, Iγ(θ), I(ce), γγ-, e-n-, e-e--, e-γ-coin, γ-branching ratios. 225Th deduced levels, J, π, rotational bands, dipole moment. Radioactive target.

doi: 10.1016/0375-9474(90)93272-8
Citations: PlumX Metrics


1990MA53      J.Phys.(London) G16, 1233 (1990)

R.Ma, D.B.Fossan, E.S.Paul, N.Xu, R.J.Poynter, P.H.Regan, R.Wadsworth, Y.-J.He, I.Jenkins, M.S.Metcalfe, S.M.Mullins, P.J.Nolan

An i13/2 Intruder Band in 139Gd

NUCLEAR REACTIONS 92Mo(50Cr, n2p), E=220 MeV; measured γγ(θ), oriented nuclei. 139Gd deduced levels, J, π, band structure.

doi: 10.1088/0954-3899/16/8/019
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1990RE12      Phys.Rev. C42, R1805 (1990)

P.H.Regan, R.Wyss, R.Wadsworth, D.B.Fossan, Y.-J.He, J.R.Hughes, I.Jenkins, R.Ma, M.S.Metcalfe, S.M.Mullins, P.J.Nolan, E.S.Paul, R.J.Poynter, N.Xu

Lifetime Measurements in 135Sm: Large deformation in the N = 6 intruder band and evidence for quenched proton pairing

NUCLEAR REACTIONS 92Mo(46Ti, n2p), E=210 MeV; measured γ-spectra, DSA. 135Sm levels deduced T1/2, deformed band quadrupole moment.

doi: 10.1103/PhysRevC.42.R1805
Citations: PlumX Metrics


1989PO03      J.Phys.(London) G15, 449 (1989)

R.J.Poynter, P.A.Butler, G.D.Jones, R.J.Tanner, C.A.White, J.R.Hughes, S.M.Mullins, R.Wadsworth, D.L.Watson, J.Simpson

Studies of Octupole Structures in the Isotopes 220,222Rn Populated via α Decay

RADIOACTIVITY 226Ra, 228Th(α), 224Ra(α) [from 228Th(α-decay)]; 218,216Po [from 222,220Rn α-decay]; measured αγ-coin. 218,216Po, 220,222Rn deduced levels, J, π.

doi: 10.1088/0954-3899/15/4/008
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1989PO19      Phys.Lett. 232B, 447 (1989)

R.J.Poynter, P.A.Butler, N.Clarkson, D.Cline, K.A.Connell, R.A.Cunningham, L.Goettig, T.H.Hoare, J.R.Hughes, N.S.Jarvis, G.D.Jones, S.Juutinen, S.M.Mullins, C.N.Pass, J.Simpson, R.Wadsworth, D.L.Watson, C.A.White

Observation of Unexpectedly Small E1 Moments in 224Ra

NUCLEAR REACTIONS 226Ra(58Ni, 60Ni), E=315 MeV; measured γγ(particle)-coin, Eγ, Iγ. 224Ra deduced levels, J, π, B(λ) ratios, intrinsic electric dipole moment. Other data input.

RADIOACTIVITY 228Th(α); measured γγ-coin, electron spectra. 224Ra deduced levels, J, π, B(λ) ratios, intrinsic electric dipole moment. Other data input.

doi: 10.1016/0370-2693(89)90439-5
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1988MU22      J.Phys.(London) G14, 1373 (1988)

S.M.Mullins, M.D.Cohler, A.Ghazarian, J.R.Hughes, R.Wadsworth, D.L.Watson, P.J.Bishop, A.J.Kirwan, P.J.Nolan, R.J.Poynter, D.J.G.Love, J.Heese

Collective Bands and Lifetime Measurements in 137Pm

NUCLEAR REACTIONS 122Te(19F, 4n), E=83 MeV; 108Pd(32S, 2np), E=152 MeV; measured Eγ, Iγ, γγ-coin, recoil distance. 137Pm deduced levels J, π, T1/2, deformation parameter, B(E2). Ge detectors, BGO escape suppression shields, BGO multiplicity filter, enriched targets. Cranked shell model.

NUCLEAR STRUCTURE 137Pm; calculated levels, deformation parameter. Cranked shell model.

doi: 10.1088/0305-4616/14/11/009
Citations: PlumX Metrics


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