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NSR database version of April 11, 2024.

Search: Author = R.Bengtsson

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2013MA73      Phys.Rev. C 88, 041306 (2013)

J.C.Marsh, W.C.Ma, G.B.Hagemann, R.V.F.Janssens, R.Bengtsson, H.Ryde, M.P.Carpenter, G.Gurdal, D.J.Hartley, C.R.Hoffman, Q.A.Ijaz, F.G.Kondev, T.Lauritsen, S.Mukhopadhyay, L.L.Riedinger, R.B.Yadav, S.Zhu

Identification of triaxial strongly deformed bands in ¹⁶⁴Hf

NUCLEAR REACTIONS ⁹⁴Zr(⁷⁴Ge, 4n), E=330 MeV; measured Eγ, Iγ, γγ-coin, four-fold γ coin using Gammasphere array at ATLAS-ANL facility. ¹⁶⁴Hf; deduced high-spin levels, J, π, normal-deformed and triaxial strongly-deformed (TSD) bands, configurations, alignments; calculated total energy surface contours. Cranked shell-model calculations using Ultimate Cranker computer code.

doi: 10.1103/PhysRevC.88.041306
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2012MO02      At.Data Nucl.Data Tables 98, 149 (2012)

P.Moller, A.J.Sierk, R.Bengtsson, H.Sagawa, T.Ichikawa

Nuclear shape isomers

NUCLEAR STRUCTURE A=31-120; calculated potential-energy surfaces, deformations and all energy minima, shape isomers near ²⁰⁸Pb.

doi: 10.1016/j.adt.2010.09.002
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2010RU10      Phys.Rev. C 82, 054309 (2010)

D.Rudolph, L.-L.Andersson, R.Bengtsson, J.Ekman, O.Erten, C.Fahlander, E.K.Johansson, I.Ragnarsson, C.Andreoiu, M.A.Bentley, M.P.Carpenter, R.J.Charity, R.M.Clark, P.Fallon, A.O.Macchiavelli, W.Reviol, D.G.Sarantites, D.Seweryniak, C.E.Svensson, S.J.Williams

Isospin and deformation studies in the odd-odd N=Z nucleus ⁵⁴Co

NUCLEAR REACTIONS ²⁸Si(³²S, npα), E=130 MeV; measured Eγ, Iγ, γγ-, αγ-, nγ-, pγ-coin, γγ(θ) using Gammasphere and Microball arrays. ⁵⁴Co; deduced levels, J, π, multipolarities, mixing ratios, configurations. Comparison with large-scale shell-model calculations in the fp shell.

doi: 10.1103/PhysRevC.82.054309
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2009MO18      Phys.Rev. C 79, 064304 (2009)

P.Moller, A.J.Sierk, T.Ichikawa, A.Iwamoto, R.Bengtsson, H.Uhrenholt, S.Aberg

Heavy-element fission barriers

NUCLEAR STRUCTURE Z=90-99, A=225-256; calculated double-humped fission barrier energies, first and second saddle heights, and fission-isomer energies. Z=78-125, N=91-188, A=171-312; calculated fission barrier heights for 1585 nuclides. ²³²Th; calculated proton and neutron single particle levels at saddles for symmetric and asymmetric fission modes. ²²⁸Th, ²³⁶U, ²⁴³Am, ²⁵²Cf, ²⁷⁸Nh, ³⁰⁵125; calculated potential energy surfaces. ²³²Th, ^{238,239,241,242,243}Am; calculated fission-barrier structures and Fermi-gas level density parameters. Macroscopic-microscopic finite-range liquid-drop model.

RADIOACTIVITY ²³⁶U, ^232,240Pu, ^222,224,230Cm, ^224,230Cf, ^226,252,258Fm, ²⁷⁷Cn(α)(SF); calculated α-decay and SF decay half-lives. ¹⁸⁰Tl, ¹⁸⁸Bi, ^192,194,196At, ²²⁸Np, ^232,234Am, ^238,240Bk, ^{242,244,246,248}Es, ^246,248,250Md(EC); calculated Q-values and fission barriers in the daughter nuclides. Macroscopic-microscopic finite-range liquid-drop model calculations. Comparisons with experimental data.

doi: 10.1103/PhysRevC.79.064304
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2009MO27      Phys.Rev.Lett. 103, 212501 (2009)

P.Moller, A.J.Sierk, R.Bengtsson, H.Sagawa, T.Ichikawa

Global Calculation of Nuclear Shape Isomers

NUCLEAR STRUCTURE A=31-290; calculated potential energy surfaces; ^{70,72,74,76,78}Kr, ¹⁸⁰Hg, ¹⁸⁶Pb, ²⁰⁸Pb; deduced deformations, shape isomerism.

doi: 10.1103/PhysRevLett.103.212501
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2008AL12      Eur.Phys.J. A 36, 21 (2008)

A.Al-Khatib, H.Hubel, P.Bringel, C.Engelhardt, A.Neusser-Neffgen, G.B.Hagemann, C.R.Hansen, B.Herskind, G.Sletten, A.Bracco, F.Camera, G.Benzoni, P.Fallon, R.M.Clark, M.P.Carpenter, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, P.Chowdhury, H.Amro, A.K.Singh, R.Bengtsson

Transition to non-collective states at high spin in ¹²⁴Xe

NUCLEAR REACTIONS ⁸²Se(⁴⁸Ca, 6n), E=205 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere. ¹²⁴Xe deduced levels, J, π.

doi: 10.1140/epja/i2008-10570-1
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2008CA16      Phys.Rev. C 78, 034316 (2008)

B.G.Carlsson, I.Ragnarsson, R.Bengtsson, E.O.Lieder, R.M.Lieder, A.A.Pasternak

Triaxial shape with rotation around the longest principal axis in ¹⁴²Gd

NUCLEAR REACTIONS ⁹⁹Ru(⁴⁸Ti, 3n2p), E=240 MeV; measured Eγ, Iγ, half-lives using doppler shift attenuation method. ¹⁴²Gd; deduced levels, B(E2), bands, configurations; calculated energy of configurations in rotational bands, deformations, potential energy surfaces. Cranking model.

doi: 10.1103/PhysRevC.78.034316
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2008MO13      At.Data Nucl.Data Tables 94, 758 (2008)

P.Moller, R.Bengtsson, B.G.Carlsson, P.Olivius, T.Ichikawa, H.Sagawa, A.Iwamoto

Axial and reflection asymmetry of the nuclear ground state

NUCLEAR STRUCTURE A=31-330; calculated nuclear ground state masses, deformation parameters; effect of axial and reflection asymmetry and of triaxiality; macroscopic-microscopic approach using folded-Yukawa single particle potential.

doi: 10.1016/j.adt.2008.05.002
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2008YA20      Phys.Rev. C 78, 044316 (2008)

R.B.Yadav, W.C.Ma, G.B.Hagemann, R.Bengtsson, H.Ryde, H.Amro, A.Bracco, M.P.Carpenter, J.Domscheit, S.Frattini, D.J.Hartley, B.Herskind, H.Hubel, R.V.F.Janssens, T.L.Khoo, F.G.Kondev, T.Lauritsen, C.J.Lister, B.Million, S.Odegard, L.L.Riedinger, K.A.Schmidt, S.Siem, G.Sletten, P.G.Varmette, J.N.Wilson, Y.C.Zhang

Identification of triaxial strongly deformed bands in ¹⁶⁸Hf

NUCLEAR REACTIONS ⁹⁶Zr(⁷⁶Ge, 4n), E=310 MeV; measured Eγ, Iγ, γγ-coin, angular distributions. ¹⁶⁸Hf; deduced levels, J, π, bands, configurations, strongly deformed triaxial bands. ^170,171,175Hf; systematics of bands. Comparison with cranked shell model calculations.

doi: 10.1103/PhysRevC.78.044316
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2007OL01      Nucl.Phys. A784, 104 (2007)

H.Olofsson, R.Bengtsson, P.Moller

Particle number projection in the macroscopic-microscopic approach

doi: 10.1016/j.nuclphysa.2006.11.052
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2006MO31      Phys.Rev.Lett. 97, 162502 (2006)

P.Moller, R.Bengtsson, B.G.Carlsson, P.Olivius, T.Ichikawa

Global Calculations of Ground-State Axial Shape Asymmetry of Nuclei

NUCLEAR STRUCTURE ¹⁰⁸Ru; calculated potential energy surface, deformation. Z=6-116; calculated ground-state axial asymmetry parameters.

doi: 10.1103/PhysRevLett.97.162502
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2004BE53      Eur.Phys.J. A 22, 355 (2004)

R.Bengtsson, H.Ryde

Magic gaps and intruder levels in triaxially superdeformed nuclei

NUCLEAR STRUCTURE ^{161,163,164,165,167}Lu, ^166,168,170Hf; calculated single particle levels vs deformation, rotational frequency; deduced conditions for triaxial superdeformed bands.

doi: 10.1140/epja/i2004-10046-4
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2004GO14      Phys.Rev. C 69, 031301 (2004)

A.Gorgen, R.M.Clark, M.Cromaz, P.Fallon, G.B.Hagemann, H.Hubel, I.Y.Lee, A.O.Macchiavelli, G.Sletten, D.Ward, R.Bengtsson

Quadrupole moments of wobbling excitations in ¹⁶³Lu

NUCLEAR REACTIONS ¹²³Sb(⁴⁴Ca, 4n), E=190 MeV; measured Eγ, Iγ, γγ-coin, DSA. ¹⁶³Lu deduced triaxial superdeformed bands transitions T_1/2, B(E2), B(M1), quadrupole moments. Gammasphere array. Comparison with cranking calculations.

doi: 10.1103/PhysRevC.69.031301
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2004OL01      Phys.Rev. C 69, 014310 (2004)

P.A.Olivius, R.Bengtsson

Interpretation of single-particle level diagrams in tilted rotation of the atomic nucleus

NUCLEAR STRUCTURE ¹⁶⁶Hf; calculated rotational bands energies, configurations, single-particle levels, tilted rotation effects.

doi: 10.1103/PhysRevC.69.014310
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2002AX01      Nucl.Phys. A708, 226 (2002)

A.Axelsson, R.Bengtsson, J.Nyberg

A Critical Appraisal of the Rediagonalization Method for Construction of Diabatic Levels

NUCLEAR STRUCTURE ¹⁴³Eu; calculated quasiparticle Routhians, rotational band total energy vs angular momentum, related features. Limitations of rediagonalization method discussed.

doi: 10.1016/S0375-9474(02)01017-5
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2002AX02      Nucl.Phys. A708, 245 (2002)

A.Axelsson, R.Bengtsson, J.Nyberg

An Investigation of Pairing Correlations in Diabatic Configurations at High Spin and Large Deformation: Applications to the description of SD bands in ¹⁴³Eu

NUCLEAR STRUCTURE ¹⁴³Eu; calculated quasiparticle Routhians, superdeformed band total energy vs angular momentum, configurations, pairing correlations. Cranked mean-field approach with self-consistent pairing, particle number projection.

doi: 10.1016/S0375-9474(02)01015-1
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2002SC11      Eur.Phys.J. A 13, 291 (2002)

G.Schonwasser, H.Hubel, G.B.Hagemann, J.Domscheit, A.Gorgen, B.Herskind, G.Sletten, J.N.Wilson, D.R.Napoli, C.Rossi-Alvarez, D.Bazzacco, R.Bengtsson, H.Ryde, P.O.Tjom, S.W.Odegard

Lifetimes of Triaxial Superdeformed States in ¹⁶³Lu and ¹⁶⁴Lu

NUCLEAR REACTIONS ¹³⁹La(²⁹Si, X)¹⁶³Lu/¹⁶⁴Lu/¹⁶³Yb, E=145 MeV; measured Eγ, γγ-coin, DSA. ^163,164Lu, ¹⁶³Yb deduced high-spin superdeformed levels T_1/2, transition and side-feeding quadrupole moments. Comparison with earlier data and Cranking model results. GASP array.

doi: 10.1007/s10050-002-8758-5
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2001BE32      Phys.Rev. C64, 014308 (2001)

R.Bengtsson, P.Moller

Why the Fermion Dynamical Symmetry Model Fails to Predict Nuclear Masses: A comprehensive assessment

NUCLEAR STRUCTURE Z=90-120; analyzed mass predictions, comparison with experimental data. Fermion dynamical symmetry model and finite-range droplet model compared.

doi: 10.1103/PhysRevC.64.014308
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1999TO08      Phys.Lett. 454B, 8 (1999)

S.Tormanen, S.W.Odegard, G.B.Hagemann, A.Harsmann, M.Bergstrom, R.A.Bark, B.Herskind, G.Sletten, P.O.Tjom, A.Gorgen, H.Hubel, B.Aengenvoort, U.J.van Severen, C.Fahlander, D.Napoli, S.Lenzi, C.Petrache, C.Ur, H.J.Jensen, H.Ryde, R.Bengtsson, A.Bracco, S.Frattini, R.Chapman, D.M.Cullen, S.L.King

Triaxial Superdeformed Bands in ¹⁶⁴Lu and Enhanced E1 Decay-Out Strength

NUCLEAR REACTIONS ¹³⁹La(²⁹Si, 4n), E=145 MeV; measured Eγ, Iγ, γγ-coin. ¹⁶⁴Lu deduced high-spin levels, J, π, configurations, triaxial deformation. Euroball array. Cranked mean-field calculations.

doi: 10.1016/S0370-2693(99)00346-9
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1997JE07      Z.Phys. A359, 127 (1997)

H.J.Jensen, R.A.Bark, R.Bengtsson, G.B.Hagemann, P.O.Tjom, S.Y.Araddad, C.W.Beausang, R.Chapman, J.Copnell, A.Fitzpatrick, S.J.Freeman, S.Leoni, J.C.Lisle, J.Simpson, A.G.Smith, D.M.Thompson, S.J.Warburton, J.Wrzesinski

Loss of Alignment Gain in the πh_9/2[541 (1/2)^-)] (x) (νi_13/2)² Band in ¹⁶⁷Tm and Neighbouring Odd-Z N = 98 Nuclei

NUCLEAR REACTIONS ¹²⁴Sn(⁴⁸Ca, 4np), E=210 MeV; measured Eγ, Iγ, γγ-coin. ¹⁶⁷Tm deduced high-spin levels, J, π, band structure. Cranked shell model calculations, data from other nuclei compared.

doi: 10.1007/s002180050377
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1997JO01      Phys.Rev. C55, 652 (1997)

N.R.Johnson, J.C.Wells, Y.Akovali, C.Baktash, R.Bengtsson, M.J.Brinkman, D.M.Cullen, C.J.Gross, H.-Q.Jin, I.-Y.Lee, A.O.Macchiavelli, F.K.McGowan, W.T.Milner, C.-H.Yu

Lifetimes of High-Spin States in the πi_13/2 Band of ¹⁷³Re

NUCLEAR REACTIONS ¹⁵⁰Sm(²⁷Al, 4n), E=132 MeV; measured γγγ-coin. ¹⁷³Re deduced high-spin levels T_1/2, transition quadrupole moments.

doi: 10.1103/PhysRevC.55.652
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1996GR03      Nucl.Phys. A597, 427 (1996)

A.Granderath, P.F.Mantica, R.Bengtsson, R.Wyss, P.von Brentano, A.Gelberg, F.Seiffert

Shapes and Rotational Structures of Neutron h_11/2 Configurations in the Xe-Ba-Ce Region

NUCLEAR STRUCTURE ^127,131Ce; analyzed experimental Routhians. ^{129,117,119,121,123,125,127}Xe, ^{127,129,133,131,135}Ce, ^{121,123,125,127,129,131,133}Ba; analyzed band structure systematics, spectra; calculated signature splitting, crossing frequencies, rotational bands; deduced decoupling parameter. Strutinsky mean field concept.

doi: 10.1016/0375-9474(95)00484-X
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1995BA51      Phys.Rev. C52, R450 (1995)

R.A.Bark, S.W.Odegard, R.Bengtsson, I.G.Bearden, G.B.Hagemann, B.Herskind, F.Ingebretsen, S.Leoni, H.Ryde, T.Shizuma, K.Strahle, P.O.Tjom, J.Wrzesinski

Intruder Bands Extended in ¹⁷⁵Re and ¹⁷⁷Ir: Deformation Changes and Interaction at the Alignment of i_13/2 Neutrons

NUCLEAR REACTIONS ¹⁶¹Dy(¹⁹F, 5n), E=106 MeV; ¹⁴⁶Nd(³⁵Cl, 4n), E=166 MeV; measured γγ-coin. ¹⁷⁵Re, ¹⁷⁷Ir deduced high-spin levels, J, π, configuration, band structure, deformation features.

doi: 10.1103/PhysRevC.52.R450
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1995NO04      Nucl.Phys. A591, 117 (1995)

A.Nordlund, R.Bengtsson, P.Ekstrom, M.Bergstrom, A.Brockstedt, H.Carlsson, H.Ryde, Y.Sun, A.Atac, G.B.Hagemann, B.Herskind, H.J.Jensen, J.Jongman, S.Leoni, A.Maj, J.Nyberg, P.O.Tjom

Probing the Limits of Complete Spectroscopy in ¹⁶⁴Yb

NUCLEAR REACTIONS ¹⁵²Sm(¹⁶O, 4n), E=83.2 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ). ¹⁶⁴Yb deduced levels, J, configurations, routhians, alignments. Cranked shell model calculations. Array of Compton-suppressed Ge-dectors.

doi: 10.1016/0375-9474(95)00124-J
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1995SC39      Nucl.Phys. A594, 175 (1995)

H.Schnack-Petersen, R.Bengtsson, R.A.Bark, P.Bosetti, A.Brockstedt, H.Carlsson, L.P.Ekstrom, G.B.Hagemann, B.Herskind, F.Ingebretsen, H.J.Jensen, S.Leoni, A.Nordlund, H.Ryde, P.O.Tjom, C.X.Yang

Superdeformed Triaxial Bands in ^163,165Lu

NUCLEAR REACTIONS ¹³⁸Ba(³¹P, 4n), E=155 MeV; ¹⁵⁰Sm(¹⁹F, 4n), E=95 MeV; measured Eγ, γγ-coin, Iγ. ¹⁶⁵Lu deduced high-spin levels, J, π, rotational band, superdeformed structure. Enriched target, array of Compton suppressed Ge-detectors. Calculation of superdeformed highly triaxial local minima in configuration separated total energy surfaces.

doi: 10.1016/0375-9474(95)00363-6
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1994BA80      Phys.Lett. 339B, 11 (1994)

R.A.Bark, R.Bengtsson, H.Carlsson

On Proton h_9/2 and i_13/2 Bands in Re and Ir Isotopes

NUCLEAR STRUCTURE ^{173,175,177,179}Ir, ^{172,174,176,178}Os, ^{171,173,175,177}Re; calculated deformations, transition quadrupole moment vs J. Diabatic configurations.

doi: 10.1016/0370-2693(94)91125-8
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1994BE02      Nucl.Phys. A569, 469 (1994)

R.Bengtsson, T.Bengtsson, M.Bergstrom, H.Ryde, G.B.Hagemann

On the use of Spin Adiabatic Energy Surfaces: Applications to the description of rotational bands in ^171,172W

NUCLEAR STRUCTURE ^171,172W; calculated levels, equilibrium deformations, transitional quadrupole moments.

doi: 10.1016/0375-9474(94)90315-8
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1994BE15      Phys.Rev.Lett. 72, 3288 (1994)

R.Bengtsson, S.Aberg

Comment on ' The Proton h_11/2 Intruder Orbital: Evidence for collectivity and a strong proton-neutron interaction '

doi: 10.1103/PhysRevLett.72.3288
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1994ES01      Nucl.Phys. A567, 377 (1994)

J.Espino, J.D.Garrett, G.B.Hagemann, P.O.Tjom, C.-H.Yu, M.Bergstrom, L.Carlen, L.P.Ekstrom, J.Lyttkens-Linden, H.Ryde, R.Bengtsson, T.Bengtsson, R.Chapman, D.Clarke, F.Khazaie, J.C.Lisle, J.N.Mo

Rotational Band Structures in ^171,172W Aspects on Signature Partnership at High Spin

NUCLEAR REACTIONS ¹⁴⁶Nd(³⁰Si, 5n), (³⁰Si, 4n), E=160 MeV; measured Eγ, Iγ, σ(Eγ, θ), γγ-coin. ^171,172W deduced levels, J, π, γ-branching, B(M1)/B(E2) ratios, experimental routhians, aligned angular momentum. Enriched targets, arrays of Compton-suppressed Ge-detectors.

doi: 10.1016/0375-9474(94)90155-4
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1993BE30      Nucl.Phys. A557, 277c (1993)

R.Bengtsson

One- Two- and Three-Dimensional Cranking

NUCLEAR STRUCTURE ¹⁶⁶Er; calculated rotational energy. ⁸⁴Y; calculated energy surfaces. ¹⁷¹W; calculated rotational bands equilibrium deformations; deduced cranking model limitations.

doi: 10.1016/0375-9474(93)90547-B
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1993JO06      Nucl.Phys. A557, 347c (1993)

N.R.Johnson, J.C.Wells, F.K.McGowan, D.F.Winchell, I.Y.Lee, P.Semmes, C.Baktash, J.D.Garrett, Y.A.Akovali, R.Bengtsson, R.Wyss, W.C.Ma, W.B.Gao, C.H.Yu, S.Pilotte

Test of Predicted Deformation-Driving Effects in ¹⁷³Re

NUCLEAR REACTIONS ¹⁵⁰Sm(²⁷Al, 4n), E=125 MeV; measured γγ-coin. ¹⁷³Re levels deduced T_1/2, B(λ), ratios, quadrupole moment, transition energy.

doi: 10.1016/0375-9474(93)90553-A
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1992BE49      Hyperfine Interactions 75, 3 (1992)

R.Bengtsson

Nuclear Orientation Measurements and Their Contribution to Our Understanding of the Structure of Nuclei

NUCLEAR STRUCTURE N=90-151; compiled, reviewed μ data. ¹¹⁰Cd; analyzed level data; deduced band structure. Other nuclei reviewed.

doi: 10.1007/BF02398960
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1991BE11      Nucl.Phys. A528, 215 (1991)

R.Bengtsson, W.Nazarewicz, O.Skeppstedt, R.Wyss

Anomalous Signature Splitting Effects in ⁷⁹Rb

NUCLEAR STRUCTURE ⁷⁹Rb; calculated total routhian surfaces; deduced deformation parameters at minimum, signature splitting features. Woods-Saxon cranking model.

doi: 10.1016/0375-9474(91)90425-6
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1991MC04      Nucl.Phys. A530, 490 (1991)

F.K.McGowan, N.R.Johnson, I.Y.Lee, C.Baktash, J.W.McConnell, M.N.Rao, M.Oshima, J.C.Wells, A.Larabee, L.L.Riedinger, R.Bengtsson, Z.Xing

Transition Quadrupole Moments of High-Spin States in ¹⁷²W and Their Implications for the Interpretation of Band Crossings in the Light Isotopes of W to Pt

NUCLEAR REACTIONS ¹²⁴Sn(⁵²Cr, 4n), E=225 MeV; measured γγ-coin, γ-spectra, Doppler shift recoil-distance. ¹⁷²W deduced levels, J, π, T_1/2, band structure, B(E1).

NUCLEAR STRUCTURE ¹⁷²W; calculated total routhian surface, deformation parameters β₂, β₄. Cranked HFB.

doi: 10.1016/0375-9474(91)90815-N
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1990BE38      Nucl.Phys. A520, 201c (1990)

R.Bengtsson

Perturbed and Hidden Band Crossings What Can be Done When the Standard Cranked Shell Model Faces Problems ( Question )

NUCLEAR STRUCTURE A=170-180; analyzed rotational band spectra; deduced deformation changes role.

doi: 10.1016/0375-9474(90)91148-K
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1990CA22      Nucl.Phys. A513, 125 (1990)

M.P.Carpenter, C.R.Bingham, L.H.Courtney, V.P.Janzen, A.J.Larabee, Z.-M.Liu, L.L.Riedinger, W.Schmitz, R.Bengtsson, T.Bengtsson, W.Nazarewicz, J.-Y.Zhang, J.K.Johansson, D.G.Popescu, J.C.Waddington, C.Baktash, M.L.Halbert, N.R.Johnson, I.Y.Lee, Y.S.Schutz, J.Nyberg, A.Johnson, R.Wyss, J.Dubuc, G.Kajrys, S.Monaro, S.Pilotte, K.Honkanen, D.G.Sarantites, D.R.Haenni

Alignment Processes and Shape Variation in ¹⁸⁴Pt

NUCLEAR REACTIONS ¹⁵⁴Sm(³⁴S, 4n), E=163 MeV; ¹⁷²Yb(¹⁶O, 4n), E=91 MeV; measured Eγ, Iγ, γ(θ), γγ-coin. ¹⁸⁴Pt deduced levels, J, π, γ-branching. Enriched targets, array of Compton-suppression Ge detectors. Total routhian surface calculations.

doi: 10.1016/0375-9474(90)90346-N
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1989BE04      Phys.Scr. 39, 196 (1989)

R.Bengtsson, J.Dudek, W.Nazarewicz, P.Olanders

A Systematic Comparison between the Nilsson and Woods-Saxon Deformed Shell Model Potentials

NUCLEAR STRUCTURE ^164,168Er; calculated single particle densities. Nilsson, Woods-Saxon deformed shell model potentials.

doi: 10.1088/0031-8949/39/2/002
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1989BE34      Z.Phys. A334, 269 (1989)

R.Bengtsson, W.Nazarewicz

Shape Coexistence in the Neutron Deficient Pb Isotopes and the Configuration-Constrained Shell Correction Approach

NUCLEAR STRUCTURE ^{185,187,189,191,193,195,197,199,201}Tl, ^{186,188,190,192,194,196,198,200,202,204,206}Pb; calculated level relative excitation energy. ^186,196,202Pb; calculated potential energy surfaces. ¹⁹⁶Pb; calculated intruder states. Configuration-constrained shell correction method.

1989KU01      Phys.Lett. 216B, 249 (1989)

H.Kucharek, P.Ring, P.Schuck, R.Bengtsson, M.Girod

Pairing Properties of Nuclear Matter from the Gogny Force

NUCLEAR STRUCTURE N=16-184; calculated pairing properties. Gogny force.

doi: 10.1016/0370-2693(89)91108-8
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1989KU04      Phys.Lett. 218B, 421 (1989)

R.Kulessa, R.Bengtsson, H.Bohn, H.Emling, T.Faestermann, F.von Feilitzsch, E.Grosse, W.Nazarewicz, D.Schwalm, H.J.Wollersheim

Angular Momentum Dependence of the Quadrupole Deformation in ^182,184,186W

NUCLEAR REACTIONS ^182,184,186W(²⁰⁸Pb, ²⁰⁸Pb'), E=4.9 MeV/nucleon; measured Doppler shifted γ-spectra following Coulomb excitation. ^182,184,186W deduced yrast level B(λ), quadrupole moments.

doi: 10.1016/0370-2693(89)91439-1
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1989WY02      Nucl.Phys. A503, 244 (1989)

R.Wyss, F.Liden, J.Nyberg, A.Johnson, D.J.G.Love, A.H.Nelson, D.W.Banes, J.Simpson, A.Kirwan, R.Bengtsson

Spectroscopy of ¹²³La and Configuration Dependent Proton Pairing

NUCLEAR REACTIONS ⁹²Mo(³⁴S, 2np), E=150, 155 MeV; ⁵²Cr(⁷⁴Se, 2np), E=290 MeV; measured Eγ, Iγ, σ(Eγ, θ), γγ-, γ(residue)-coin. ¹²³La deduced levels, J, π, band structure, experimental routhians, aligned angular momentum. Enriched targets, Ge detectors, array of anti-Compton spectrometer, 4π bismuth germanate ball.

doi: 10.1016/0375-9474(89)90263-7
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1989WY03      Nucl.Phys. A505, 337 (1989)

R.Wyss, A.Granderath, R.Bengtsson, P.von Brentano, A.Dewald, A.Gelberg, A.Gizon, J.Gizon, S.Harissopulos, A.Johnson, W.Lieberz, W.Nazarewicz, J.Nyberg, K.Schiffer

Interplay between Proton and Neutron S-Bands in the Xe-Ba-Ce-Region

NUCLEAR STRUCTURE ^{120,122,124,126,128,130}Xe, ^{122,124,126,128,130,132}Ba, ^{124,126,128,130,132,134}Ce; calculated total Routhian surfaces, levels, band structure.

doi: 10.1016/0375-9474(89)90378-3
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1988WY01      Z.Phys. A329, 255 (1988)

R.A.Wyss, A.Johnson, J.Nyberg, R.Bengtsson, W.Nazarewicz

Competition between (h_11/2)² Proton and Neutron Excitations Around ¹²⁸Ba: Coexistence of near prolate and near oblate shapes at high spin

NUCLEAR STRUCTURE ^128,125Ba, ¹³¹La; calculated Routhian surfaces, proton, neutron quasiparticle energies; deduced shape coexistence. Cranked shell model.

1988WY02      Z.Phys. A330, 123 (1988)

R.Wyss, F.Liden, J.Nyberg, A.Johnson, D.J.G.Love, A.H.Nelson, D.W.Banes, J.Simpson, A.Kirwan, R.Bengtsson

High Spin Spectroscopy of ¹²³Ba and Alignment Processes for A ≈ 120

NUCLEAR REACTIONS ⁹⁴Mo(³²S, n2p), E=150, 155 MeV; measured γγ-coin. ⁷⁴Se(⁵²Cr, n2p), E=290 MeV; measured not given. ¹²³Ba deduced levels, J, π, Nilsson configutation, band structure.

1988WY03      Phys.Lett. 215B, 211 (1988)

R.Wyss, J.Nyberg, A.Johnson, R.Bengtsson, W.Nazarewicz

Highly Deformed Intruder Bands in the A ≈ 130 Mass Region

NUCLEAR STRUCTURE A ≈ 130; calculated total routhians; deduced model parameters. ^131,132Ce; calculated total routhians. ¹³⁵Nd, ¹³²Ce; calculated moments of inertia; deduced deformed band features. Deformed shell model.

doi: 10.1016/0370-2693(88)91422-0
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1987BE06      Phys.Lett. 183B, 1 (1987)

R.Bengtsson, T.Bengtsson, J.Dudek, G.Leander, W.Nazarewicz, J.Zhang

Shape Coexistence and Shape Transitions in Even-Even Pt and Hg Isotopes

NUCLEAR STRUCTURE ^{176,178,180,182,184,186,188,190,192,194,196,198}Pt, ^{178,180,182,184,186,188,190,192,194,196,198,200}Hg; calculated potential energy surfaces, deformations, prolate-oblate energy differences. Woods-Saxon potential, liquid drop model.

doi: 10.1016/0370-2693(87)91406-7
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1987BE42      Nucl.Phys. A473, 77 (1987)

R.Bengtsson, I.Ragnarsson, S.Aberg, A.Gyurkovich, A.Sobiczewski, K.Pomorski

Properties of Nuclei at the Third-Minimum Deformation

NUCLEAR STRUCTURE ^{226,230,232,236}Th, ²²⁸Rn, ²³⁶Pu; calculated potential energy surfaces vs deformation. Macroscopic-microscopic method.

doi: 10.1016/0375-9474(87)90156-4
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1987FR14      Phys.Lett. 196B, 14 (1987)

H.Frisk, R.Bengtsson

Spin Orientation in Rotating Nuclei

NUCLEAR STRUCTURE ⁸⁴Y; calculated lowest configuration energy surfaces. Cranking HFB model.

doi: 10.1016/0370-2693(87)91667-4
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1986BE09      Phys.Lett. 172B, 277 (1986)

R.Bengtsson, S.Aberg

g Factors as a Probe of Correlated Changes of the Nuclear Deformation and Pair Field in Ground-State Rotational Bands

NUCLEAR STRUCTURE ¹⁵⁴Dy; calculated g-band transitional quadrupole moments, g proton, neutron pairing gap energy vs ground state deformation. ¹⁶⁴Dy, ^158,168Yb; calculated proton pairing gap energy vs ground state deformation. ¹⁶⁰Yb; calculated neutron pairing gap energy vs ground state deformation, g. ^156,160,162Dy; calculated neutron, proton energy gaps, g. ^{154,156,158,160,162,164}Dy deduced correlation between Δ(n), Δ(p), g.

doi: 10.1016/0370-2693(86)90251-0
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1986BE10      At.Data Nucl.Data Tables 35, 15 (1986)

R.Bengtsson, S.Frauendorf, F.-R.May

Quasiparticle Levels in Rotating Rare Earth Nuclei: A cranked shell-model dictionary

NUCLEAR STRUCTURE ^{152,154,150,156}Sm, ^{152,154,156,158,160}Gd, ^{154,156,158,160,162,164}Dy, ^{156,158,160,162,164,166,168,170}Er, ^{160,162,164,166,168,170,172,174,176}Yb, ^{162,164,166,168,170,172,174,176,178,180,182,184,186}Hf, ^{166,168,170,172,174,176,178,180,182,184,186,188}W, ^{170,172,174,176,178,180,182,184,186,188,190}Os, ^{176,178,180,182,184,186,188,190}Pt; calculated quasiparticle levels. Rare earth nuclei, cranked shell model dictionary.

doi: 10.1016/0092-640X(86)90028-8
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1986BE31      J.Phys.(London) G12, L223 (1986)

R.Bengtsson, J.-Y.Zhang, J.H.Hamilton, L.K.Peker

Potential Energy Surface Calculations of Nuclear Shape Transitions and Shape Coexistence in ^176,178,180Pt

NUCLEAR STRUCTURE ^176,178,180Pt; calculated potential energy surfaces, yrast state transition energy vs spin.

doi: 10.1088/0305-4616/12/3/010
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1986JO02      Nucl.Phys. A449, 537 (1986)

S.Jonsson, N.Roy, H.Ryde, W.Walus, J.Kownacki, J.D.Garrett, G.B.Hagemann, B.Herskind, R.Bengtsson, S.Aberg

Near-Yrast Spectroscopy of ¹⁶⁴Yb and Neighbouring Nuclei: Systematics of octupole bands and bandcrossings

NUCLEAR STRUCTURE ¹⁶⁴Yb; calculated levels, octupole band structure, routhians; deduced two-quasineutron routhians, alignments and two-quasineutron residual interaction. Cranked-shell-model comaprison. Octupole-phonon plus rotor calculation of octupole bands.

NUCLEAR REACTIONS ¹⁵²Sm(¹⁶O, 4n), ¹⁵⁰Sm(¹⁸O, 4n), E=81-84 MeV; measured γγ-coin, γ(θ). ¹⁶⁴Yb deduced levels, J, π, ICC, rotational band characteristics. Enriched targets, Ge(Li) detectors, Compton-suppressed Ge(Li) coincidence set-up, mini-orange spectrometer, Si(Li) detector. Cranked shell model calculations.

doi: 10.1016/0375-9474(86)90234-4
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1986LA08      Phys.Lett. 169B, 21 (1986)

A.J.Larabee, M.P.Carpenter, L.L.Riedinger, L.H.Courtney, J.C.Waddington, V.P.Janzen, W.Nazarewicz, J.-Y.Zhang, R.Bengtsson, G.A.Leander

Shape Coexistence and Alignment Processes in the Light Pt and Au Region

NUCLEAR REACTIONS ¹⁷⁰Yb(¹⁹F, 4n), E=97 MeV; measured γγ-coin. ¹⁸⁵Au deduced levels, J, π, γ-branching, band deformations, shape coexistence.

doi: 10.1016/0370-2693(86)90678-7
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1986MA06      Phys.Lett. 167B, 277 (1986)

W.C.Ma, A.V.Ramayya, J.H.Hamilton, S.J.Robinson, J.D.Cole, E.F.Zganjar, E.H.Spejewski, R.Bengtsson, W.Nazarewicz, J.-Y.Zhang

The Structure of High Spin States in ¹⁸⁴Hg and ¹⁸⁶Hg

NUCLEAR STRUCTURE ¹⁸⁶Hg; analyzed data; deduced band structure interpretation.

NUCLEAR REACTIONS ¹⁵⁶Gd(³²S, 4n), E=155, 160, 165 MeV; measured σ(Eγ, E), γγ-coin, DSA, γ(θ), oriented nuclei. ¹⁸⁴Hg deduced levels, J, π, T_1/2, B(E2), β₂. Cranked shell model comparision.

doi: 10.1016/0370-2693(86)90345-X
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1986RA07      Phys.Rev.Lett. 57, 667 (1986)

M.N.Rao, N.R.Johnson, F.K.McGowan, I.Y.Lee, C.Baktash, M.Oshima, J.W.McConnell, J.C.Wells, A.Larabee, L.L.Riedinger, R.Bengtsson, Z.Xing, Y.S.Chen, P.B.Semmes, G.A.Leander

Loss of Collectivity at High Spin in ¹⁷²W and a Three-Band Interpretation of First Yrast Upbends

NUCLEAR REACTIONS ¹²⁴Sn(⁵²Cr, 4n), E=230 MeV; measured γγ-coin, Doppler shift recoil distance. ¹⁷²W deduced levels, J, π, T_1/2, yrast sequence, dynamical moment of inertia, configuration, transition quadrupole moments.

doi: 10.1103/PhysRevLett.57.667
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1985BE15      Nucl.Phys. A437, 263 (1985)

R.Bengtsson, H.Frisk

Signature-Dependent Properties in ¹⁵²Eu

NUCLEAR STRUCTURE ¹⁵²Eu; calculated levels, yrast state deformations; deduced signature dependent deformation. Self-consitent treatment.

doi: 10.1016/0375-9474(85)90088-0
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1985NA02      Nucl.Phys. A435, 397 (1985)

W.Nazarewicz, J.Dudek, R.Bengtsson, T.Bengtsson, I.Ragnarsson

Microscopic Study of the High-Spin Behaviour in Selected A = 80 Nuclei

NUCLEAR STRUCTURE ^{84,82,80,78,76,74}Sr; calculated total energy vs β₂. ^72,74,76,78Kr, ^{82,84,74,76,78,80,82,84}Sr, ^{78,80,82,84,86}Zr; calculated oblate, protate β₂, quadrupole moment. ^{74,76,78,80,82,84}Sr; calculated total energy surfaces, yrast levels. ^75,77,79,81Kr, ^77,79,81Rb, ^77,79,81,83Sr, ⁸³Y; calculated levels, β₂. ^80,82Kr; calculated low energy levels, band structure. Shell correction, microscopic model.

doi: 10.1016/0375-9474(85)90471-3
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1984BE02      Phys.Lett. 135B, 358 (1984)

R.Bengtsson, J.-Y.Zhang

Reduction of the Pairing Gap in Excited Quasiparticle Configurations

NUCLEAR STRUCTURE ^{163,164,165,166}Er; calculated neutron pairing gap vs rotational frequency; deduced pairing gap reduction configuration dependence.

doi: 10.1016/0370-2693(84)90293-4
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1984BE12      Nucl.Phys. A415, 189 (1984)

R.Bengtsson, H.Frisk, F.R.May, J.A.Pinston

Signature Inversion - A Fingerprint of Triaxiality

NUCLEAR STRUCTURE ¹⁵⁴Tb; calculated routhians, signature splitting vs deformation. ¹⁵²Eu, ¹⁵⁶Tb; calculated signature splitting. ¹⁵²Eu, ^153,155Gd, ^154,156Tb, ^155,157Dy, ^156,158Ho, ^157,159Er, ^155,157Tm, ^159,161Yb; analyzed spin inversion, band crossing frequency data; deduced triaxiality dependence.

doi: 10.1016/0375-9474(84)90620-1
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1984BE27      Phys.Scr. 29, 402 (1984)

R.Bengtsson, P.Moller, J.R.Nix, Jing-ye Zhang

Nuclear Shapes and Shape Transitions

NUCLEAR STRUCTURE A=16-279; calculated potential energy surfaces, ground state masses, shapes. Macroscopic Yukawa plus exponential model.

doi: 10.1088/0031-8949/29/5/002
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1984HA19      J.Phys.(London) G10, L87 (1984)

J.H.Hamilton, A.V.Ramayya, C.F.Maguire, R.B.Piercey, R.Bengtsson, P.Moller, J.R.Nix, Jing-ye Zhang, R.L.Robinson, S.Frauendorf

Effects of Reinforcing Shell Gaps on the Competition between Spherical and Highly Deformed Shapes

NUCLEAR STRUCTURE A=70-80, 100; analyzed data systematics; deduced neutron, proton shell gap reinforcement, nuclear shape coexistence in the A=75 region.

doi: 10.1088/0305-4616/10/5/001
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1983BE30      Nucl.Phys. A405, 221 (1983)

R.Bengtsson, Y.-S.Chen, J.-Y.Zhang, S.Aberg

Deformation Changes along the Yrast Line in ¹⁶⁰Yb

NUCLEAR STRUCTURE ¹⁶⁰Yb; calculated yrast levels, ground band deformation vs spin, band moments of inertia. Cranked HFB model, particle number projection.

doi: 10.1016/0375-9474(83)90569-9
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1982BE46      Nucl.Phys. A389, 158 (1982)

R.Bengtsson, J.A.Pinston, D.Barneoud, E.Monnand, F.Schussler

High-Spin States in the Odd-Odd ¹⁵⁴Tb and ¹⁵⁶Tb Nuclei and the Systematic for the [i_13/2](n)[h_11/2](p) Bands

NUCLEAR REACTIONS ^148,150Nd(¹¹B, xn), E=50-68 MeV; measured Eγ, Iγ, σ(Eγ, θγ, E), γγ(t), ¹¹Bγ(t). ^154,155,156Tb deduced levels, J, π, T_1/2, configuration, band systematics. Enriched targets.

doi: 10.1016/0375-9474(82)90296-2
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1981PI07      Nucl.Phys. A361, 464 (1981)

J.A.Pinston, R.Bengtsson, E.Monnand, F.Schussler, D.Barneoud

Rotational Bands in the Odd-Odd ¹⁵²Eu Nucleus

NUCLEAR REACTIONS ¹⁵⁰Nd(⁷Li, 5n), E=35-50 MeV; measured Eγ, Iγ, σ(E, Eγ, θ), γγ-coin, γ(t). ¹⁵²Eu deduced levels, J, π, T_1/2, δ, (g(k)-g(R)), g(k), rotational bands. Enriched targets.

doi: 10.1016/0375-9474(81)90647-3
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1979BE05      Nucl.Phys. A314, 27 (1978)

R.Bengtsson, S.Frauendorf

An Interpretation of Backbending in Terms of the Crossing of the Ground State Band with an Aligned Two-Quasiparticle Band

NUCLEAR STRUCTURE Er, Yb, Hf, W, Dy, Os; analyzed backbending assuming constant interaction between ground-state rotational band, low-lying S-band.

doi: 10.1016/0375-9474(79)90552-9
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1979BE36      Nucl.Phys. A327, 139 (1979)

R.Bengtsson, S.Frauendorf

Quasiparticle Spectra Near the Yrast Line

NUCLEAR STRUCTURE ^165,167,169Yb, ^{157,159,161,163,164,165}Er, ¹⁶⁵Tm; analyzed yrast spectra; deduced signature α, parity of observed bands. Quasiparticle configuration, deformed rotating field of frequency omega.

doi: 10.1016/0375-9474(79)90322-1
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1978HA35      Nucl.Phys. A306, 406 (1978)

H.-B.Hakansson, T.Berggren, R.Bengtsson

The Single-Nucleon Form Factor for Knock-Out and Pick-up Reactions in Deformed Nuclei

NUCLEAR REACTIONS ¹²C, ¹⁶O(p, 2p), E=460 MeV; calculated σ(θ).

doi: 10.1016/0375-9474(78)90472-4
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1976AN10      Nucl.Phys. A268, 205 (1976)

G.Andersson, S.E.Larsson, G.Leander, P.Moller, S.G.Nilsson, I.Ragnarsson, S.Aberg, R.Bengtsson, J.Dudek, B.Nerlo-Pomorska, K.Pomorski, Z.Szymanski

Nuclear Shell Structure at Very High Angular Momentum

NUCLEAR STRUCTURE ²⁴Mg, ^114,116,118Te, ^122,124,126Xe, ^{122,124,126,128,130,138}Ba, ¹⁵⁰Gd, ^150,154Sm, ^{158,160,164,166,168}Yb, ¹⁷⁸W, ^{182,178,186,190}Os, ²⁰⁴Pb, ¹⁶⁰Er, ²⁹⁸Fl; calculated potential energy surfaces, shell structure.

doi: 10.1016/0375-9474(76)90461-9
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1975BE08      Phys.Lett. 55B, 281 (1975)

R.Bengtsson, W.M.Howard

Mass Asymmetric Fission and the Termination of the Astrophysical r-Process

NUCLEAR STRUCTURE A=220-300; calculated heavy/light fragment ratio from fission at termination of astrophysical formation process.

doi: 10.1016/0370-2693(75)90600-0
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1975BE18      Nucl.Phys. A245, 39 (1975)

R.Bengtsson

An Investigation of the Scaled Modified Oscillator Potential

NUCLEAR STRUCTURE A=165-260; calculated fission parameters, total energy surfaces.

doi: 10.1016/0375-9474(75)90081-0
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1975BE35      Phys.Lett. 57B, 301 (1975)

R.Bengtsson, S.E.Larsson, G.Leander, P.Moller, S.G.Nilsson, S.Aberg, Z.Szymanski

Yrast Bands and High-Spin Potential-Energy Surfaces

NUCLEAR STRUCTURE ¹⁴⁶Sm, ¹⁶⁰Yb; calculated yrast bands, energy surfaces.

doi: 10.1016/0370-2693(75)90455-4
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1972BE74      Nucl.Phys. A198, 591 (1972)

R.Bengtsson

Shell Correction Energies Derived from Statistical Entropy Calculations

doi: 10.1016/0375-9474(72)90710-5
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