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NSR database version of April 11, 2024.

Search: Author = R.R.Chasman

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2015AH04      Phys.Rev. C 92, 024313 (2015)

I.Ahmad, R.R.Chasman, J.P.Greene, F.G.Kondev, S.Zhu

Electron capture decay of 58-min 22992U and levels in 22991Pa

RADIOACTIVITY 229U(EC)[from 229Th(α, 4n) and 230Th(3He, 4n)]; measured Eγ, Iγ, E(x ray), I(x ray), E(ce), I(ce), γ(x ray)-, γγ-coin, half-life of 229U ground state. 229Pa; deduced levels, J, π, conversion coefficients, multipolarity, EC feedings, logft, Nilsson configurations. Discussed splitting of 5/2+ and 5/2- doublet and signature of octupole deformation. Comparison with shell-model calculations of level structure in 229,231Pa. 225Th, 221Ra(α)[from 229U -> 225Th α decay chain]; measured Eγ, Iγ, E(ce), I(ce). 217Rn, 221Ra; deduced levels, conversion coefficients, multipolarity.

doi: 10.1103/PhysRevC.92.024313
Citations: PlumX Metrics

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

2009AH03      Phys.Rev. C 80, 064315 (2009)

I.Ahmad, R.R.Chasman

Neutron single-particle states above the N=164 subshell in 98251Cf and 96249Cm studied by neutron transfer reactions

NUCLEAR REACTIONS 248Cm(α, 3He), E=98.5 MeV; 250Cf(d, p), E=12 MeV; analyzed 3He and proton spectra and σ(θ) from earlier experiments using DWBA. 249Cm, 251Cf; deduced levels, J, π, and configurations; calculated neutron single-particle energies using Woods-Saxon single-particle potential.

doi: 10.1103/PhysRevC.80.064315
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Data from this article have been entered in the XUNDL database. For more information, click here.

2007CH61      Phys.Rev.Lett. 99, 082501 (2007)


n-p Pairing, Wigner Energy, and Shell Gaps

NUCLEAR STRUCTURE 12C, 16O, 28Si, 32S, 56Ni; calculated correlation energy ratios and shell gaps.

doi: 10.1103/PhysRevLett.99.082501
Citations: PlumX Metrics

2005AH03      Phys.Rev. C 71, 054305 (2005)

I.Ahmad, F.G.Kondev, E.F.Moore, M.P.Carpenter, R.R.Chasman, J.P.Greene, R.V.F.Janssens, T.Lauritsen, C.J.Lister, D.Seweryniak, R.W.Hoff, J.E.Evans, R.W.Lougheed, C.E.Porter, L.K.Felker

Energy levels of 249Bk populated in the α decay of 25399Es and β- decay of 24996Cm

RADIOACTIVITY 253Es(α); measured Eα, Eγ, γγ-, αγ-coin. 249Cm(β-) [from 248Cm(n, γ)]; measured Eγ, Iγ. 249Bk deduced levels, J, π, configurations, B(λ), g factors. 253Es(SF); measured Eγ, Iγ from fission fragment decay; deduced fission branching ratio. Gammasphere array, comparisons with model predictions.

doi: 10.1103/PhysRevC.71.054305
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2005AH09      Phys.Rev. C 72, 054308 (2005)

I.Ahmad, J.P.Greene, E.F.Moore, F.G.Kondev, R.R.Chasman, C.E.Porter, L.K.Felker

Energy levels of 251Cf populated in the α decay of 255100Fm and EC decay of 25199Es

RADIOACTIVITY 255Fm(α); measured Eγ, Iγ. 251Es(EC); measured Eγ, Iγ, E(ce), I(ce). 251Cf deduced levels, J, π, configurations, vibrational states.

doi: 10.1103/PhysRevC.72.054308
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Data from this article have been entered in the XUNDL database. For more information, click here.

2005CH78      Phys.Rev.Lett. 95, 262501 (2005)


Variational Approach to Configuration Interaction

doi: 10.1103/PhysRevLett.95.262501
Citations: PlumX Metrics

2003AH07      Phys.Rev. C 68, 044306 (2003)

I.Ahmad, R.R.Chasman, J.P.Greene, F.G.Kondev, E.F.Moore, E.Browne, C.E.Porter, L.K.Felker

Energy level of 247Cm populated in the α decay of 25198Cf

RADIOACTIVITY 251Cf(α); measured Eα, Eγ, E(ce), αγ-coin; deduced hindrance factors. 247Cm deduced levels, J, π, T1/2, octupole mixing. Comparison with model predictions.

doi: 10.1103/PhysRevC.68.044306
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2003CH02      Phys.Lett. B 553, 204 (2003)


Effects of n-p pairing on nuclear structure

doi: 10.1016/S0370-2693(02)03226-4
Citations: PlumX Metrics

2003CH77      Phys.Lett. B 577, 47 (2003)


n-p Pairing-diagonal matrix elements; Wigner energy, symmetry energy and spectroscopy

NUCLEAR STRUCTURE A=60-64; calculated energy levels, neutron-proton pairing effects, role of diagonal matrix elements.

doi: 10.1016/j.physletb.2003.10.014
Citations: PlumX Metrics

2002CH01      Phys.Lett. 524B, 81 (2002)


N-P Pairing in Nuclei

NUCLEAR STRUCTURE A=60-66; calculated variational wavefunctions, levels, correlation energies, neutron-proton pairing features.

doi: 10.1016/S0370-2693(01)01364-8
Citations: PlumX Metrics

2001CH51      Phys.Rev. C64, 024311 (2001)


Very Extended Nuclear Shapes Near A = 100

NUCLEAR STRUCTURE 100,102,104Zr, 100,102,104,106Mo, 100,102,104,106,108,110,112Ru, 102,104,106,108,110,112,114Pd, 106,108,110,112,114Cd, 110,112,114,116Sn, 114,116,118,120Te, 118,120,122Xe; calculated high-spin states deformation. Cranked Strutinsky method.

doi: 10.1103/PhysRevC.64.024311
Citations: PlumX Metrics

2001CH54      Phys.Lett. 513B, 325 (2001)

R.R.Chasman, J.L.Egido, L.M.Robledo

Persistence of Deformed Shapes in the Neutron-Deficient Pb Region

NUCLEAR STRUCTURE 182,184,186,188,190Pb; calculated 0+ states energy, quadrupole moments, deformation features. HFB method with Gogny interaction, many-body method with phenomenological interaction.

doi: 10.1016/S0370-2693(01)00382-3
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2000AH02      Phys.Rev. C61, 044301 (2000)

I.Ahmad, R.R.Chasman, P.R.Fields

Spectroscopic Studies Beyond the N = 152 Neutron Gap: Decay of 101255Md and 101256Md

RADIOACTIVITY 255,256Md(EC), (α) [from 253Es(α, xn)]; measured Eα, Iα, Eγ, Iγ, αγ-coin, X-ray spectra. 255Md deduced ground state J, π. 255,256Fm, 251Es deduced levels, J, π, configurations. Comparisons with mean-field calculations.

doi: 10.1103/PhysRevC.61.044301
Citations: PlumX Metrics

2000AH09      Phys.Rev. C62, 064302 (2000)

I.Ahmad, M.P.Carpenter, R.R.Chasman, J.P.Greene, R.V.F.Janssens, T.L.Khoo, F.G.Kondev, T.Lauritsen, C.J.Lister, P.Reiter, D.Seweryniak, A.Sonzogni, J.Uusitalo, I.Wiedenhover, P.Bhattacharyya

Energy Levels in 98251Cf Populated in the α Decay of 100255Fm

RADIOACTIVITY 255Fm(α); measured Eγ, Iγ, (X-ray)γ-, γγ-coin. 251Cf deduced levels, J, π, configurations. Gammasphere array, comparisons with model predictions.

doi: 10.1103/PhysRevC.62.064302
Citations: PlumX Metrics

1999AH01      Nucl.Phys. A646, 175 (1999)

I.Ahmad, B.B.Back, R.R.Chasman, J.P.Greene, T.Ishii, L.R.Morss, G.P.A.Berg, A.D.Bacher, C.C.Foster, W.R.Lozowski, W.Schmitt, E.J.Stephenson, T.Yamanaka

Possible Observation of the 1/2+[880] Orbital in 96249Cm

NUCLEAR REACTIONS 248Cm, 232Th, 208Pb(α, 3He), E=98.5 MeV; measured σ(E, θ). 249Cm deduced levels, J, π.

doi: 10.1016/S0375-9474(98)00618-6
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2372.

1998CH16      Phys.Rev.Lett. 80, 4610 (1998)


Comment on ' Spins, Parity, Excitation Energies, and Octupole Structure of an Excited Superdeformed Band in 194Hg and Implications for Identical Bands '

NUCLEAR STRUCTURE 194Hg; calculated superdeformed band configuration. Disagreement with previous interpretation.

doi: 10.1103/PhysRevLett.80.4610
Citations: PlumX Metrics

1997CH06      Phys.Lett. 392B, 255 (1997)

R.R.Chasman, I.Ahmad

Nuclear Structure at A ∼ 250 and the Stability of the Superheavy Elements

NUCLEAR STRUCTURE Z=96-103; N=148-157; calculated Q(α). Z=110-124; N=150-184; calculated deformations at minima. Z=112-124; N=160-186; calculated α-decay T1/2. 255Md deduced J, Nilsson assignment. Woods-Saxon potential extrapolated superheavy region.

doi: 10.1016/S0370-2693(96)01591-2
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1997EG01      Phys.Lett. 393B, 13 (1997)

J.L.Egido, L.M.Robledo, R.R.Chasman

Nuclear Shapes in 176W with Density Dependent Forces: From ground state to fission

NUCLEAR STRUCTURE 176W; calculated energy surface. HPB, density-dependent forces.

doi: 10.1016/S0370-2693(96)01602-4
Citations: PlumX Metrics

1996FI08      Phys.Rev. C54, R2806 (1996)

S.M.Fischer, R.V.F.Janssens, M.A.Riley, R.R.Chasman, I.Ahmad, D.J.Blumenthal, T.B.Brown, M.P.Carpenter, G.Hackman, D.J.Hartley, T.L.Khoo, T.Lauritsen, W.C.Ma, D.Nisius, J.Simpson, P.G.Varmette

Superdeformed Band in 155Dy: Where does the ' island ' of superdeformation end ( Question )

NUCLEAR REACTIONS 124Sn(36S, 5n), E=175 MeV; measured Eγ, (γγγ)-coin, Iγ, DSA. 155Dy deduced superdeformed band, dynamic moment of inertia, quadrupole moment, configuration, deformation from T1/2 analysis.

doi: 10.1103/PhysRevC.54.R2806
Citations: PlumX Metrics

1995CH37      Phys.Lett. 351B, 18 (1995)

R.R.Chasman, L.M.Robledo

Octupole Deformations in the Very Extended Nuclear Shapes of the ∼ 180 Region

NUCLEAR STRUCTURE 168,170,172,174,176,178,180,182,184Yb, 170,172,174,176,178,180,182,184,186Hf, 172,174,176,178,180,182,184,186,188W, 174,176,178,180,182,184,186,188,190Os, 176,178,180,182,184,186,188,190,192Pt, 178,180,182,184,186,188,190,192,194Hg, 180,182,184,186,188,190,192,194,196Pb, 182,184,186,188,190,192,194,196,198Po; calculated octupole deformation energy lowering. Four dimensional deformation space, quadrupole, octupole, hexadecapole, necking deformations.

doi: 10.1016/0370-2693(95)00327-H
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1995CH67      Phys.Lett. 364B, 137 (1995)


Very Extended Shapes in the A ≈ 156 Mass Region

NUCLEAR STRUCTURE 158Er, 152Dy; calculated energy surface. 151,152,153Eu, 145,146,152,153,154Gd; 146,147,153,154,155,156Tb, 146,147,152,153,154,155Dy; calculated extended minima properties. 156Ho; calculated nucleon levels vs cranking frequency. Discussed hyperdeformation related features, 4D-deformation space.

doi: 10.1016/0370-2693(95)01257-5
Citations: PlumX Metrics

1994EG02      Phys.Lett. 322B, 22 (1994)

J.L.Egido, L.M.Robledo, R.R.Chasman

High Spin Shapes in 182Os with Density Dependent Forces

NUCLEAR STRUCTURE 182Os; calculated potential energy, neutron, proton pairing energy vs quadrupole moment, shape density; deduced axis ratios for shape minima.

doi: 10.1016/0370-2693(94)90485-5
Citations: PlumX Metrics

1993CH08      Phys.Lett. 302B, 134 (1993)


Very Extended Minima in the A = 180 Mass Region

NUCLEAR STRUCTURE Z=70-82; N=96-112; calculated model properties at yrast point. 182Os; calculated energy surface; deduced minima. Cranked Strutinsky procedure.

doi: 10.1016/0370-2693(93)90372-O
Citations: PlumX Metrics

1993CH47      Phys.Lett. 319B, 41 (1993)


Configuration Interaction Effects in Rotational Bands of Superdeformed Nuclei

NUCLEAR STRUCTURE 192Hg; calculated superdeformed band neutron, proton pairing, transition energies. Cranking Hamiltonian with pairing.

doi: 10.1016/0370-2693(93)90778-G
Citations: PlumX Metrics

1992CH20      Phys.Lett. 280B, 187 (1992)


The Fermion Dynamic Symmetry Model and Superdeformation Near A = 220

NUCLEAR STRUCTURE 222,223,224Fr, 222,223,224,225Ra, 222,223,224,225,226Ac, 223,224,225,226,227Th, 223,224,225,226,227,228Pa, 224,225,226,227,228,229U; calculated well depths, quadrupole, hexadecapole deformation, level energies, static moments of inertia; deduced oblate superdeformed minima, prolate superdeformation features. Fermion dynamic symmetry model.

doi: 10.1016/0370-2693(92)90053-7
Citations: PlumX Metrics

1991AH01      Phys.Rev. C44, 1204 (1991)

I.Ahmad, M.P.Carpenter, R.R.Chasman, R.V.F.Janssens, T.L.Khoo

Rotational Bands with Identical Transition Energies in Actinide Nuclei

NUCLEAR STRUCTURE 240Pu, 244,246Cm, 250Cf, 236,238U; analyzed level data; deduced identical transition energy rotational bands.

doi: 10.1103/PhysRevC.44.1204
Citations: PlumX Metrics

1991CH21      Z.Phys. A339, 111 (1991)


Nuclear Equilibrium Shapes Near A = 100

NUCLEAR STRUCTURE A ≈ 100; calculated nuclear equilibrium shapes.

doi: 10.1007/BF01282939
Citations: PlumX Metrics

1991CH36      Phys.Lett. 266B, 243 (1991)


Superdeformed and Hyperdeformed Banana Shaped Nuclides Near A = 190

NUCLEAR STRUCTURE 190Pt, 189,190,191,192Au, 188,189,190,191,192,193,194,195Hg, 189,190,191,192,193,194,195Tl, 190,191,192,193Pb, 193,194,195,196Bi, 194Po; calculated level energy relative to prolate mininum, barrier heights, reflection symmetric shapes; deduced superdeformed, hyperdeformed minima, deformation features.

doi: 10.1016/0370-2693(91)91033-R
Citations: PlumX Metrics

1990AH02      Phys.Lett. 251B, 338 (1990)

I.Ahmad, R.R.Chasman, A.M.Friedman, S.W.Yates

Neutron Single Particle States Above the N = 152 Subshell

NUCLEAR REACTIONS 250Cf(d, p), E=12 MeV; measured proton spectra. 251Cf deduced levels, rotational bands, Nilsson assignments.

doi: 10.1016/0370-2693(90)90716-J
Citations: PlumX Metrics

1990CH24      Phys.Lett. 242B, 317 (1990)


The Effects of Pairing on Superdeformed Rotational Bands Near A = 190

NUCLEAR STRUCTURE 190,191,192,193,194Hg, 193,194Tl; calculated superdeformed level second moments of inertia.

doi: 10.1016/0370-2693(90)91768-7
Citations: PlumX Metrics

1990DR06      Nucl.Phys. A515, 466 (1990)

M.W.Drigert, M.Piiparinen, R.V.F.Janssens, R.Holzmann, I.Ahmad, J.Borggreen, R.R.Chasman, P.J.Daly, B.K.Dichter, H.Emling, U.Garg, Z.W.Grabowski, T.L.Khoo, W.C.Ma, M.Quader, D.C.Radford, W.Trzaska

Discrete and Continuum Gamma-Ray Studies of 147Gd and 148Gd

NUCLEAR REACTIONS 116Cd(36S, 5n), (36S, 4n), E=170 MeV; measured Eγ, Iγ, γγ(θ), γγ-correlations, Doppler shifts. 147,148Gd deduced levels, J, π, band structure, deformation. Enriched target, Compton-suppressed Ge-detectors, central array of BGO hexagons.

doi: 10.1016/0375-9474(90)90594-C
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1990KH06      Nucl.Phys. A520, 169c (1990)

T.L.Khoo, R.V.F.Janssens, E.F.Moore, K.B.Beard, Ph.Benet, I.Ahmad, M.P.Carpenter, R.R.Chasman, P.J.Daly, M.W.Drigert, U.Garg, Z.W.Grabowski, F.L.H.Wolfs, D.Ye

Population of Superdeformed Bands, the Competition with Fission, and the Barrier between Normal and Superdeformed States

NUCLEAR REACTIONS 160Gd(36S, 4n), E=154-172 MeV; 120Sn(36S, 4n), E=170 MeV; measured γγ-coin, γ-multiplicity. 152Dy, 192Hg deduced superdeformed band level entry, feeding spin features.

doi: 10.1016/0375-9474(90)91144-G
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1990YE01      Phys.Rev. C41, R13 (1990)

D.Ye, R.V.F.Janssens, M.P.Carpenter, E.F.Moore, R.R.Chasman, I.Ahmad, K.B.Beard, Ph.Benet, M.W.Drigert, P.B.Fernandez, U.Garg, T.L.Khoo, S.L.Ridley, F.L.H.Wolfs

Superdeformed Band in 192Hg

NUCLEAR REACTIONS 160Gd(36S, 4n), E=162 MeV; measured γγ-coin. 192Hg deduced levels, J, π, superdeformed band structure.

doi: 10.1103/PhysRevC.41.R13
Citations: PlumX Metrics

1989CH06      Phys.Lett. 219B, 227 (1989)


Superdeformation Near A = 190

NUCLEAR STRUCTURE 178W, 191,192,193Re, 178,180,192,193,194Os, 191,192,193,194,195Ir, 190,191,192,193,194,195,196Pt, 190,191,192,193,194,195,196Au, 187,190,191,192,193,194,195,196Hg, 188Tl, 191At, 192,203,204Rn, 193Fr; calculated level energies; deduced superdeformation features. Cranked Strutinsky method.

doi: 10.1016/0370-2693(89)90382-1
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1989CH07      Phys.Lett. 219B, 232 (1989)


Odd-Multipole Correlations in the Light Actinides

NUCLEAR STRUCTURE 230,226,224Th, 234U; calculated levels, B(λ); deduced odd-multipole correlation evidence.

doi: 10.1016/0370-2693(89)90383-3
Citations: PlumX Metrics

1989MO08      Phys.Rev.Lett. 63, 360 (1989)

E.F.Moore, R.V.F.Janssens, R.R.Chasman, I.Ahmad, T.L.Khoo, F.L.H.Wolfs, D.Ye, K.B.Beard, U.Garg, M.W.Drigert, Ph.Benet, Z.W.Grabowski, J.A.Cizewski

Observation of Superdeformation in 191Hg

NUCLEAR REACTIONS 160Gd(36S, 5n), E=172 MeV; measured γγ-coin. 191Hg deduced superdeformed band structure, shape characteristics.

doi: 10.1103/PhysRevLett.63.360
Citations: PlumX Metrics

1988DR01      Phys.Lett. 201B, 223 (1988)

M.W.Drigert, R.V.F.Janssens, R.Holzmann, R.R.Chasman, I.Ahmad, J.Borggreen, P.J.Daly, B.K.Dichter, H.Emling, U.Garg, Z.W.Grabowski, T.L.Khoo, W.C.Ma, M.Piiparinen, M.Quader, D.C.Radford, W.Trzaska

Evidence for Superdeformation in 148Gd

RADIOACTIVITY 148Gd(α) [from 116Cd(36S, 4n), E=170 MeV]; measured Eγ, Iγ, γγ-coin, energy correlations. 148Gd deduced moment of inertia superdeformation. Compton suppressed Ge detectors. Cranked Strutinsky calculations.

NUCLEAR STRUCTURE 146,147,148,150,151,152,153,154,155,156Er, 145,147,148,149,150,151,152,153,154,155Ho, 144,145,146,147,148,149,150,151,152,153Dy, 143,144,145,146,147,148,149,150,151,152,153Tb, 142,143,144,145,146,147,148,149,150,151,152Gd, 141,142,143,144,145,146,147,148,149,150,151Eu, 140,141,142,143,144,145,146,147,148,149,150Sm, 139,140,141,142,143,144,145,146,147,148,149Pm, 138,139,140,141,142,143,144,145,146,147,148Pr, 138,139,140,141,142,143,144,145,146,147,148Nd; calculated moments of inertia. 148Gd deduced superdeformation evidence. Cranked Strutinsky model.

doi: 10.1016/0370-2693(88)90217-1
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1988MA18      Phys.Rev. C37, 1407 (1988)

H.E.Martz, R.K.Sheline, R.G.Lanier, R.W.Hoff, G.L.Struble, D.J.Decman, D.G.Burke, R.R.Chasman, R.A.Naumann

Octupole Deformation in 227Ac by Single-Proton Stripping Reactions: 226Ra(α, t)227Ac and 226Ra(3He, d)227Ac

NUCLEAR REACTIONS 226Ra(α, t), (3He, d), E=30 MeV; measured σ(θ). 227Ac deduced levels, J, π. Nilsson model reflection-symmetric and Leander model reflection-asymmetric calculations. Radioactive target.

doi: 10.1103/PhysRevC.37.1407
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1988RA19      Phys.Lett. 209B, 177 (1988)

G.-E.Rathke, R.V.F.Janssens, M.W.Drigert, I.Ahmad, K.Beard, R.R.Chasman, U.Garg, M.Hass, T.L.Khoo, H.-J.Korner, W.C.Ma, S.Pilotte, P.Taras, F.L.H.Wolfs

A Superdeformed Band in 151Dy

NUCLEAR REACTIONS 122Sn(34S, 5n), E=174.5 MeV; measured γγ-coin, γ multiplicity, Eγ, Iγ. 151Dy deduced levels, J, π, γ-branching, deformation, superdeformation features.

doi: 10.1016/0370-2693(88)90928-8
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1987AH05      Nucl.Phys. A472, 285 (1987)

I.Ahmad, J.E.Gindler, A.M.Friedman, R.R.Chasman, T.Ishii

Level Structure of 225Ac

RADIOACTIVITY 229Pa(α) [from 229Th(d, 2n), 230Th(d, 3n)]; measured Eγ, Iγ, I(ce), αγ-, γγ-coin. 225Ra(β-) [from 229Th α-decay]; measured Eγ, Iγ. 225Ac deduced levels, J, π.

doi: 10.1016/0375-9474(87)90211-9
Citations: PlumX Metrics

1987CH07      Phys.Lett. 187B, 219 (1987)


Superdeformation in the Rare-Earth Region

NUCLEAR STRUCTURE 132Ce, 146Pm, 141,142,147,148Sm, 142,143,144,145,146,147,148,149Eu, 144,147,148,149,150Gd, 149,150,151,152Tb, 151,152,153Dy, 153Ho; calculated well depths, deformation, superdeformation parameters, excitation energies, proton, neutron unoccupied levels. Strutinsky method.

doi: 10.1016/0370-2693(87)91084-7
Citations: PlumX Metrics

1987PI07      Phys.Lett. 194B, 468 (1987)

M.Piiparinen, M.W.Drigert, R.V.F.Janssens, I.Ahmad, J.Borggreen, R.R.Chasman, P.J.Daly, B.K.Dichter, H.Emling, U.Garg, Z.W.Grabowski, R.Holzmann, T.L.Khoo, W.C.Ma, M.Quader, D.C.Radford, W.Trzaska

Level Structure of 148Gd up to I = 44

NUCLEAR REACTIONS 116Cd(36S, 4n), E=170 MeV; measured Eγ, Iγ, γγ-coin. 148Gd deduced levels, J, π, γ-branching, γ multipolarity, configurations. Compton suppressed Ge spectrometer array.

doi: 10.1016/0370-2693(87)90218-8
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1986CH23      Phys.Lett. 175B, 254 (1986)


Incipient Octupole and 26-Pole Deformation in the Mass Region 220 < A < 230

NUCLEAR STRUCTURE 220,222,224Rn, 220,222,224,226,228Ra, 222,224,226,228Th, 224,226,228U; calculated binding energies; deduced deformation role, characteristics.

doi: 10.1016/0370-2693(86)90850-6
Citations: PlumX Metrics

1986CH43      Phys.Lett. 182B, 261 (1986)

R.R.Chasman, I.Ahmad

Triaxiality and Reflection Asymmetry in the Mass Region A ≈ 220

NUCLEAR STRUCTURE 223,225Ra; calculated levels, B(E2); deduced triaxial deformation effects. Shell corrections.

doi: 10.1016/0370-2693(86)90086-9
Citations: PlumX Metrics

1985IS03      Nucl.Phys. A444, 237 (1985)

T.Ishii, I.Ahmad, J.E.Gindler, A.M.Friedman, R.R.Chasman, S.B.Kaufman

Measurement of Rates of Fast E1 Transitions in Ac-Ra Nuclei

RADIOACTIVITY 225Ra(β-); 229Th, 231Pa(α); measured γγ(t), αγ(t). 225Ra levels deduced T1/2, quadrupole moment, B(λ), α-branching ratio. 225,227Ac deduced T1/2, B(λ).

doi: 10.1016/0375-9474(85)90348-3
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1984AH01      Phys.Rev.Lett. 52, 503 (1984)

I.Ahmad, R.R.Chasman, J.E.Gindler, A.M.Friedman

Enhanced E1 Transition Rates and Octupole Deformation in 225Ac

RADIOACTIVITY 229Pa(α); 225Ra(β-); measured I(K X-ray), Iγ, ratio. 225Ra level deduced J, π. 225Ac levels deduced J, π, γ-branching, γ-multipolarity, enhanced B(E1), parity doublet rotational band characteristics.

doi: 10.1103/PhysRevLett.52.503
Citations: PlumX Metrics

1984CH35      Phys.Lett. 149B, 433 (1984)

R.R.Chasman, B.D.Wilkins

Spin-Orbit Interaction in Strongly Deformed Nuclides

NUCLEAR STRUCTURE 154Dy; calculated levels. N=86, 88, 90; calculated shell correction effect vs radius parameter.

doi: 10.1016/0370-2693(84)90360-5
Citations: PlumX Metrics

1983CH30      Phys.Rev. C28, 1374 (1983)


Spherical, Oblate, and Prolate Nuclear Shapes near 146Gd

NUCLEAR STRUCTURE 144Sm, 146,147Gd, 148Dy, 150Er, 152Yb, 154Hf; calculated single particle spectrum, high spin yrast levels, B(E2), 0+ excited state spectrum, pair transfer probability.

doi: 10.1103/PhysRevC.28.1374
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1982AH08      Phys.Rev.Lett. 49, 1758 (1982)

I.Ahmad, J.E.Gindler, R.R.Betts, R.R.Chasman, A.M.Friedman

Possible Ground-State Octupole Deformation in 229Pa

RADIOACTIVITY 229Pa(EC), 229U(EC) [from mass separation]; measured I(ce), Eγ, Iγ, γγ-, γ(X-ray)-, (ce)(X-ray)-coin. 229Pa deduced levels, J, π, K, γ-multipolarity, ground state doublet splitting, Nilsson assignment.

NUCLEAR REACTIONS 231Pa(p, t), E=16.5 MeV; measured σ(Et). 229Pa deduced levels, J, π, possible octupole deformation, Nilsson assignment, K.

doi: 10.1103/PhysRevLett.49.1758
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1982CH04      Phys.Lett. 108B, 251 (1982)


The Relation of the Neutron Single Particle Gap at N = 82 to High Spin Yrast States at A ≈ 150

NUCLEAR STRUCTURE 147Gd, 150,151,152Dy; calculated high-spin yrast states. Empirical neutron gap energy, pairing, quadrupole-quadrupole interactions.

doi: 10.1016/0370-2693(82)91186-8
Citations: PlumX Metrics

1981CH10      Phys.Lett. 102B, 229 (1981)


Neutron Single Particle States for N ≈ 82 and the Yrast States of 150,151,152Dy

NUCLEAR STRUCTURE 152,151,150Dy; calculated levels, single particle energies, quadrupole matrix elements. Quadrupole-quadrupole interaction Hamiltonian.

doi: 10.1016/0370-2693(81)90864-9
Citations: PlumX Metrics

1980CH04      Phys.Rev. C21, 456 (1980)


147Tb and Proton Single Particle States Near Z = 64

NUCLEAR STRUCTURE 144Sm, 146Gd, 148Dy, 143Pm, 147Tb; calculated high spin state energies. Pairing interaction.

doi: 10.1103/PhysRevC.21.456
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1980CH30      Phys.Lett. B96, 7 (1980)


Incipient Octupole Deformation and Parity Doublets in the Odd Mass Light Actinides

NUCLEAR STRUCTURE 231,229,227Th, 227,229,231Pa, 227Ac; calculated levels, B(E3); deduced octupole deformation, parity doublets. Pairing Hamiltonian, quadrupole-quadrupole, octupole-octupole interactions.

doi: 10.1016/0370-2693(80)90199-9
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1979AH02      Phys.Rev. C19, 1140 (1979)

I.Ahmad, R.R.Chasman

Electric Monopole Transitions and Excited 0+ States in 250Cf

RADIOACTIVITY 250Es [from 249Cf(d, n), E=18 MeV]; measured Eγ, Iγ, E(ce), I(ce). 250Cf deduced levels, log ft(ϵ), J, π, γ-multipolarity, E0 transition. Mass separation.

doi: 10.1103/PhysRevC.19.1140
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1979CH02      Phys.Rev.Lett. 42, 630 (1979)


Octupole-Octupole Residual Interactions and Low-Lying 0+ Excited States in the Isotopes 232U, 234U, and 236U

NUCLEAR STRUCTURE 232,234,236U; calculated energies of low-lying 0+ states. Hamiltonian with pairing, particle-hole octupole-octupole forces, interaction strength adjusted to fit 0- energies.

doi: 10.1103/PhysRevLett.42.630
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1977AH01      Phys.Rev.Lett. 39, 12 (1977)

I.Ahmad, A.M.Friedman, R.R.Chasman, S.W.Yates

Proton Orbital 1/2- [521] and the Stability of Superheavy Elements

NUCLEAR REACTIONS 250Cf, 246Cm(α, t), E=28 MeV; measured σ(Et). 251Es, 247Bk deduced levels, K, J, π.

doi: 10.1103/PhysRevLett.39.12
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1977CH27      Rev.Mod.Phys. 49, 833 (1977)

R.R.Chasman, I.Ahmad, A.M.Friedman, J.R.Erskine

Survey of Single-Particle States in the Mass Region A > 228

NUCLEAR STRUCTURE 229,231,233Th, 233,235,237,239U, 237,239,241,243,245Pu, 243,245,247,249Cm, 247,249,251,253Cf, 251Fm, 231,233Pa, 235,237,239Np, 239,241,243,245Am, 247,249Bk; analyzed structure data; deduced level character, K, J, π.

doi: 10.1103/RevModPhys.49.833
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1976CH22      Phys.Rev. C14, 1935 (1976)


Density-Dependent Delta Interactions and Actinide Pairing Matrix Elements

NUCLEAR STRUCTURE 233,235,237U, 241Pu, 245,247,249Cm, 251Cf, 231Pa, 237Np, 241,243Am, 249Bk, 251Es; calculated, extracted single particle spectra; deduced DDDI matrix elements.

doi: 10.1103/PhysRevC.14.1935
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1976WI17      Phys.Rev. C14, 1832 (1976)

B.D.Wilkins, E.P.Steinberg, R.R.Chasman

Scission-Point Model of Nuclear Fission Based on Deformed-Shell Effects

NUCLEAR STRUCTURE Po, Ra, U, Cm, Cf, Fm; calculated fission A, Z, kinetic energy distributions. Liquid-drop model.

doi: 10.1103/PhysRevC.14.1832
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1975ER01      Phys.Rev. C11, 561 (1975)

J.R.Erskine, G.Kyle, R.R.Chasman, A.M.Friedman

Study of 249Bk, 241Am, and 231Pa with Proton Transfer Reactions

NUCLEAR REACTIONS 248Cm(3He, d), 248Cm, 240Pu, 230Th(α, t), E=29 MeV; measured σ(Ed), σ(Et). 249Bk, 241Am, 231Pa deduced levels, J, S, β.

doi: 10.1103/PhysRevC.11.561
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1975YA11      Phys.Rev. C12, 442 (1975)

S.W.Yates, R.R.Chasman, A.M.Friedman, I.Ahmad, K.Katori

Particle-Phonon Interactions in 248Cf and 249Cf

NUCLEAR REACTIONS 249Cf(d, d'), E=15 MeV; measured σ(Ed', θ). 249Cf(d, t), E=12 MeV; measured σ(Et, θ). 248,249Cf deduced levels, K, J, π.

doi: 10.1103/PhysRevC.12.442
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1974CH34      Phys.Rev.Lett. 33, 544 (1974)


Superheavy Elements and the Strutinsky Prescription

NUCLEAR STRUCTURE 298Fl; calculated single particle energy levels.

doi: 10.1103/PhysRevLett.33.544
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1973CH04      Phys.Rev. C7, 553 (1973)


Method of Correlated Quasiparticles. II. 0+ Particle-Particle Residual Interactions

NUCLEAR STRUCTURE 234,236U; calculated neutron occupation probabilities. Correlated quasiparticle method.

doi: 10.1103/PhysRevC.7.553
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1973CH36      Phys.Rev. C8, 1896 (1973)


Method of Correlated Quasiparticles. III. 0+ Particle-Particle Residual Interactions in Odd-Mass Systems

NUCLEAR STRUCTURE 235,237U calculated levels. Quasiparticles, residual interactions.

doi: 10.1103/PhysRevC.8.1896
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1972BR46      Phys.Rev. C6, 1374 (1972)

T.H.Braid, R.R.Chasman, J.R.Erskine, A.M.Friedman

Reaction-Spectroscopy Studies of the Actinide Elements. III. Levels in 241Pu and 243Pu

NUCLEAR REACTIONS 242Pu(d, p), E=12 MeV; 240Pu(d, p), E=12 MeV; 242Pu(d, t), E=12 MeV; 241Pu(d, d'), E=12 MeV; measured Q, σ(Ep), σ(Et), σ(Ed'). 240Pu(n, γ), E=thermal; measured Eγ, Iγ. 241Pu, 243Pu deduced levels, J, Nilsson assignments.

doi: 10.1103/PhysRevC.6.1374
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC0822.

1972CH12      Phys.Rev.Lett. 28, 1275 (1972)


0+ Excited States in the Actinides

NUCLEAR STRUCTURE 234,236U; calculated 0+ excited states. Pairing force theory.

doi: 10.1103/PhysRevLett.28.1275
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1971BR27      Phys.Rev. C4, 247 (1971)

T.H.Braid, R.R.Chasman, J.R.Erskine, A.M.Friedman

(d, p) and (d, t) Studies of the Actinide Elements. II. 243Cm, 245Cm, 247Cm, and 249Cm

NUCLEAR REACTIONS 244,246,248Cm(d, p), (d, t), E=12, 16 MeV; measured σ(Ep), σ(Et). 243,245,247,249Cm deduced levels, J, Nilsson assignments, deformation parameters.

doi: 10.1103/PhysRevC.4.247
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1971CH13      Phys.Rev. C3, 1803 (1971)


Simple Momentum-Dependent Nuclear Central Potential

NUCLEAR STRUCTURE 235U; calculated single-particle states. A=160-250; deduced potential parameters. Momentum- dependent central potential.

doi: 10.1103/PhysRevC.3.1803
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1970BR01      Phys.Rev. C1, 275 (1970)

T.H.Braid, R.R.Chasman, J.R.Erskine, A.M.Friedman

(d, p) and (d, t) Reaction Studies of the Actinide Elements. I. U235

NUCLEAR REACTIONS 234U(d, p), 236U(d, t), E=12 MeV; measured σ(Ep), σ(Et), Q. 235U deduced levels, S, rotational band assignments.

doi: 10.1103/PhysRevC.1.275
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1967ER02      Proc.Intern.Conf.Atomic Masses, 3rd, Winnipeg, Canada, R.C.Barber, Ed., Univ.Manitoba Press, p.622 (1967)

J.R.Erskine, A.M.Friedman, T.H.Braid, R.R.Chasman

Nuclear Q-Value Measurements on a Series of Actinide Nuclei

NUCLEAR REACTIONS 230,232Th, 234,236,238U, 240,242Pu, 244,246,248Cm(d, p), E = 12 MeV; 230,232Th, 234,236,238U, 242Pu, 244,246,248Cm(d, t), E = 12 MeV; measured Q.

1966CH19      Nucl.Phys. 89, 11 (1966)


Neutron Single-Particle Energies in the Yb Isotopes

NUCLEAR STRUCTURE 175Yb, 173Yb, 171Yb, 177Yb, 169Yb; measured not abstracted; deduced nuclear properties.

doi: 10.1016/0029-5582(66)90842-X
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1965BR22      Phys.Letters 18, 149 (1965)

T.H.Braid, R.R.Chasman, J.R.Erskine, A.M.Friedman

Energy Level Structure of 231Th, 235U, 237U, 241Pu and 243Pu as Observed at High Resolution with (d, p) Reactions

NUCLEAR STRUCTURE 237U, 235U, 231Th, 241Pu, 243Pu; measured not abstracted; deduced nuclear properties.

doi: 10.1016/0031-9163(65)90695-5
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC0822.

1963CH06      Phys.Rev. 129, 2113 (1963)


Nuclear Magnetic Moments of W183, Os187, and Fe57

NUCLEAR STRUCTURE 187Os, 57Fe, 183W; measured not abstracted; deduced nuclear properties.

doi: 10.1103/PhysRev.129.2113
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1962CH22      TID-16262 (1962); Nucl.Sci.Abstr.17, 3200, Abstr.24398 (1963)


Nuclear Magnetic Moments of W183, Os187 and Fe57

NUCLEAR STRUCTURE 57Fe, 187Os, 183W; measured not abstracted; deduced nuclear properties.

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