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NSR database version of April 27, 2024.

Search: Author = R.J.Poynter

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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
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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
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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 i_13/2 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 νi_13/2 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, T_1/2, deformation parameter β₂, quadrupole moments, band structure. ¹³⁵Sm deduced levels, J, π, T_1/2, 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
Citations: PlumX Metrics

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 i_13/2 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
Citations: PlumX Metrics
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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 T_1/2, deformed band quadrupole moment.

doi: 10.1103/PhysRevC.42.R1805
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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, T_1/2, 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
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