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NSR database version of April 11, 2024.

Search: Author = R.A.Wyss

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2022LI49      Phys.Rev. C 106, 034304 (2022)

X.Liu, B.Cederwall, C.Qi, R.A.Wyss, O.Aktas, A.Ertoprak, W.Zhang, E.Clement, G.de France, D.Ralet, A.Gadea, A.Goasduff, G.Jaworski, I.Kuti, B.M.Nyako, J.Nyberg, M.Palacz, R.Wadsworth, J.J.Valiente-Dobon, H.Al-Azri, A.Atac Nyberg, T.Back, G.de Angelis, M.Doncel, J.Dudouet, A.Gottardo, M.Jurado, J.Ljungvall, D.Mengoni, D.R.Napoli, C.M.Petrache, D.Sohler, J.Timar, D.Barrientos, P.Bednarczyk, G.Benzoni, B.Birkenbach, A.J.Boston, H.C.Boston, I.Burrows, L.Charles, M.Ciemala, F.C.L.Crespi, D.M.Cullen, P.Desesquelles, C.Domingo-Pardo, J.Eberth, N.Erduran, S.Erturk, V.Gonzalez, J.Goupil, H.Hess, T.Huyuk, A.Jungclaus, W.Korten, A.Lemasson, S.Leoni, A.Maj, R.Menegazzo, B.Million, R.M.Perez-Vidal, Zs.Podolyak, A.Pullia, F.Recchia, P.Reiter, F.Saillant, M.D.Salsac, E.Sanchis, J.Simpson, O.Stezowski, C.Theisen, M.Zielinska

Evidence for spherical-oblate shape coexistence in ⁸⁷Tc

NUCLEAR REACTIONS ⁵⁴Fe(³⁶Ar, 2np)⁸⁷Tc, E=115 MeV; measured Eγ, Iγ, γγ-coin, (particle)γ-coin using AGATA array with 11 triple-cluster segmented HPGe detectors, DIAMANT array with 60 CsI(Tl) scintillators for protons, NEDA and NeutronWall arrays for neutrons with 54 and 42 organic liquid scintillator detectors at the GANIL facility. ⁸⁷Tc; deduced levels, J, π, band-like structure, g.s. Jπ, intensity ratios in different channels, configurations, spherical behavior. Comparison with shell model and total Routhian surface calculations, and with their previous results reported in 2021Li40 (Phys. Rev. C 104, L021302).

doi: 10.1103/PhysRevC.106.034304
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2021LI40      Phys.Rev. C 104, L021302 (2021)

X.Liu, B.Cederwall, C.Qi, R.A.Wyss, O.Aktas, A.Ertoprak, W.Zhang, E.Clement, G.de France, D.Ralet, A.Gadea, A.Goasduff, G.Jaworski, I.Kuti, B.M.Nyako, J.Nyberg, M.Palacz, R.Wadsworth, J.J.Valiente-Dobon, H.Al-Azri, A.Atac Nyberg, T.Back, G.de Angelis, M.Doncel, J.Dudouet, A.Gottardo, M.Jurado, J.Ljungvall, D.Mengoni, D.R.Napoli, C.M.Petrache, D.Sohler, J.Timar, D.Barrientos, P.Bednarczyk, G.Benzoni, B.Birkenbach, A.J.Boston, H.C.Boston, I.Burrows, L.Charles, M.Ciemala, F.C.L.Crespi, D.M.Cullen, P.Desesquelles, C.Domingo-Pardo, J.Eberth, N.Erduran, S.Erturk, V.Gonzalez, J.Goupil, H.Hess, T.Huyuk, A.Jungclaus, W.Korten, A.Lemasson, S.Leoni, A.Maj, R.Menegazzo, B.Million, R.M.Perez-Vidal, Zs.Podolyak, A.Pullia, F.Recchia, P.Reiter, F.Saillant, M.D.Salsac, E.Sanchis, J.Simpson, O.Stezowski, C.Theisen, M.Zielinska

Evidence for enhanced neutron-proton correlations from the level structure of the N = Z + 1 nucleus ⁸⁷₄₃Tc₄₄

NUCLEAR REACTIONS ⁵⁴Fe(³⁶Ar, 2np)⁸⁷Tc, E=115 MeV; measured Eγ, Iγ, charged particles, (particle)g- and γγ-coin using AGATA array of 11 triple-cluster segmented HPGe detectors for γ rays and DIAMANT array of 60 CsI(Tl) scintillators for particles at the GANIL accelerator complex. ⁸⁷Tc; deduced high-spin levels, J, π, rotational band, kinematic moments of inertia, alignment. Comparison with the structures of neighboring odd-mass N=44 and N=43 isotonic chains, and with shell-model calculations. Systematics of positive-parity yrast states in ⁸³Y, ⁸⁵Nb, ^87,89,91,93Tc.

doi: 10.1103/PhysRevC.104.L021302
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2019PE12      Phys.Lett. B 795, 241 (2019)

C.M.Petrache, P.M.Walker, S.Guo, Q.B.Chen, S.Frauendorf, Y.X.Liu, R.A.Wyss, D.Mengoni, Y.H.Qiang, A.Astier, E.Dupont, R.Li, B.F.Lv, K.K.Zheng, D.Bazzacco, A.Boso, A.Goasduff, F.Recchia, D.Testov, F.Galtarossa, G.Jaworski, D.R.Napoli, S.Riccetto, M.Siciliano, J.J.Valiente-Dobon, M.L.Liu, X.H.Zhou, J.G.Wang, C.Andreoiu, F.H.Garcia, K.Ortner, K.Whitmore, T.Back, B.Cederwall, E.A.Lawrie, I.Kuti, D.Sohler, J.Timar, T.Marchlewski, J.Srebrny, A.Tucholski

Diversity of shapes and rotations in the γ-soft ¹³⁰Ba nucleus: First observation of a t-band in the A = 130 mass region

NUCLEAR REACTIONS ¹²²Sn(¹³C, 5n), E=65 MeV; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, B(M1)/B(E2), quasiparticle t-band and the odd-spin partners of the S-bands built on prolate 2qp-proton and oblate 2qp-neutron configurations. Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2019.06.040
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2013AN13      Phys.Rev.Lett. 110, 242502 (2013)

A.N.Andreyev, M.Huyse, P.Van Duppen, C.Qi, R.J.Liotta, S.Antalic, D.Ackermann, S.Franchoo, F.P.Hessberger, S.Hofmann, I.Kojouharov, B.Kindler, P.Kuusiniemi, S.R.Lesher, B.Lommel, R.Mann, K.Nishio, R.D.Page, B.Streicher, S.Saro, B.Sulignano, D.Wiseman, R.A.Wyss

Signatures of the Z = 82 Shell Closure in α-Decay Process

RADIOACTIVITY ¹⁸⁶Po, ¹⁸²Pb, ¹⁷⁸Hg, ¹⁷⁴Pt(α) [from ¹⁴⁴Sm(⁴⁶Ti, X)¹⁹⁰Po, E=230 MeV, ¹⁹⁰Po(4n)]; measured decay products, Eα, Iα; deduced σ, identification of ¹⁸⁶Po, the α-particle formation probabilities.

doi: 10.1103/PhysRevLett.110.242502
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2010QI04      Phys.Rev. C 81, 064319 (2010)

C.Qi, A.N.Andreyev, M.Huyse, R.J.Liotta, P.Van Duppen, R.A.Wyss

Abrupt changes in α-decay systematics as a manifestation of collective nuclear modes

doi: 10.1103/PhysRevC.81.064319
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2009SA31      Int.J.Mod.Phys. E18, 808 (2009)

W.Satula, M.Zalewski, J.Dobaczewski, P.Olbratowski, M.Rafalski, T.R.Werner, R.A.Wyss

Global nuclear structure aspects of tensor interaction

NUCLEAR STRUCTURE ^{111,113,115,117,119,121,123,125,127,129}Sn; ^40,48Ca, ⁵⁶Ni; calculated level properties using Skyrme-Hartree-Fock; ^{18,20,22,24,26,30}O, ^40,48Ca, ⁵⁶Ni, ⁹⁰Zr, ¹³²Sn, ²⁰⁸Pb; calculated mass excess and related quantities. Compared to available data.

doi: 10.1142/S0218301309012902
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2009ZA08      Phys.Rev. C 80, 064307 (2009)

M.Zalewski, P.Olbratowski, M.Rafalski, W.Satula, T.R.Werner, R.A.Wyss

Global nuclear structure effects of the tensor interaction

NUCLEAR STRUCTURE ¹⁶O, ^40,48Ca, ⁵⁶Ni, ^80,90Zr, ^100,132Sn, ²⁰⁸Pb; calculated binding energies, mechanism for superdeformed structures, and potential energy curves using energy-density-functional (EDF) methods with spherical and deformed HFB approaches and SLy4T interaction. Z=1-84, N=1-130; calculated tensor contribution to nuclear binding energy. Comparison with experimental data.

doi: 10.1103/PhysRevC.80.064307
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2009ZA11      Eur.Phys.J. A 42, 577 (2009)

M.Zalewski, W.Satula, J.Dobaczewski, P.Olbratowski, M.Rafalski, T.R.Werner, R.A.Wyss

Shell structure fingerprints of tensor interaction

NUCLEAR STRUCTURE ^40,48Ca, ⁵⁶Ni; calculated spin-orbit splittings. Z=2-82; A=4-210; calculated binding energy tensor contributions. Local energy density functional.

doi: 10.1140/epja/i2008-10768-1
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2008SA29      Phys.Rev. C 78, 011302 (2008)

W.Satula, R.A.Wyss, M.Zalewski

Contradicting effective mass scalings in the single-particle spectra calculated using the Skyrme energy density functional method

NUCLEAR STRUCTURE ^42,44Ca, ^44,45Sc, ^45,46Ti, ⁴⁷V; calculated isovector effective mass for single particle level splittings, two-body spin-orbit strength. Skyrme energy density functional.

doi: 10.1103/PhysRevC.78.011302
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2007WY01      Phys.Rev. C 76, 011301 (2007)

R.A.Wyss, P.J.Davies, W.Satula, R.Wadsworth

Contrasting behavior in the rotational structure of the T_z = 1/2 nuclei ⁷³Kr and ⁷⁵Rb: A possible fingerprint of T = 0 neutron-proton pairing correlations

NUCLEAR STRUCTURE ⁷⁵Rb; calculated level energies, J, π using TRS including schematic T=0 and T=1 pairing.

NUCLEAR REACTIONS ⁴⁰Ca(⁴⁰Ca, pα), E=165 MeV; measured Eγ, Iγ, γγ-coin. ⁷⁵Rb; deduced levels, J, π, rotational bands. Comparison with TRS calculations.

doi: 10.1103/PhysRevC.76.011301
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2006BA08      Phys.Lett. B 633, 231 (2006)

S.Ban, J.Meng, W.Satula, R.A.Wyss

Nuclear symmetry energy in relativistic mean field theory

doi: 10.1016/j.physletb.2005.11.077
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2006RA04      Int.J.Mod.Phys. E15, 484 (2006)

M.Rafalski, W.Satula, R.A.Wyss

Mass number dependence of the Skyrme-force-induced nuclear symmetry energy

doi: 10.1142/S0218301306004405
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2006SA22      Phys.Rev. C 74, 011301 (2006)

W.Satula, R.A.Wyss, M.Rafalski

Global properties of the Skyrme-force-induced nuclear symmetry energy

doi: 10.1103/PhysRevC.74.011301
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2005SA01      Rep.Prog.Phys. 68, 131 (2005)

W.Satula, R.A.Wyss

Mean-field description of high-spin states

doi: 10.1088/0034-4885/68/1/R03
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2005ZD01      Phys.Rev. C 71, 024305 (2005)

H.Zdunczuk, W.Satula, R.A.Wyss

Probing the nuclear energy functional at band termination

NUCLEAR STRUCTURE ^42,44Ca, ^44,45Sc, ^45,46Ti, ⁴⁷V, ^50,51,52Mn; calculated band-terminating states energies, configurations, role of spin fields and spin-orbit term. Self-consistent Skyrme-Hartree-Fock model, comparison with data.

doi: 10.1103/PhysRevC.71.024305
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2005ZD03      Int.J.Mod.Phys. E14, 451 (2005)

H.Zdunczuk, W.Satula, R.A.Wyss

Probing spin fields and spin-orbit term of the local nuclear energy functional at band termination

NUCLEAR STRUCTURE ^42,44Ca, ^44,45Sc, ^45,46Ti, ⁴⁷V; calculated band-terminating states energies; deduced constraints on local nuclear energy functional. Self-consistent Skyrme-Hartree-Fock model.

doi: 10.1142/S0218301305003260
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2004GL01      Eur.Phys.J. A 19, 33 (2004)

S.Glowacz, W.Satula, R.A.Wyss

Cranking in isospace

NUCLEAR STRUCTURE ¹⁸F, ²²Na, ²⁶Al, ³⁰P, ³⁴Cl, ³⁸K, ⁴²Sc, ⁴⁶V, ⁵⁰Mn, ⁵⁴Co, ⁵⁸Cu, ⁶²Ga, ⁶⁶As, ⁷⁰Br, ⁷⁴Rb; calculated pair-transfer amplitudes, energy differences between T=0 and T=1 states. Comparison with data.

doi: 10.1140/epja/i2003-10111-6
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2003SA35      Phys.Lett. B 572, 152 (2003)

W.Satula, R.A.Wyss

Comments on the nuclear symmetry energy

NUCLEAR STRUCTURE A=48; A=68; A=88; calculated symmetry energy; deduced role of mean level density and isovector potential.

doi: 10.1016/j.physletb.2003.08.026
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2002RO01      Phys.Rev. C65, 014308 (2002)

D.G.Roux, E.Gueorguieva, B.R.S.Babu, D.G.Aschman, M.Benatar, R.Fearick, M.S.Fetea, J.J.Lawrie, G.K.Mabala, S.M.Mullins, S.H.T.Murray, S.Naguleswaran, R.T.Newman, C.Rigollet, J.F.Sharpey-Schafer, F.D.Smit, W.J.Whittaker, R.A.Wyss

Signature Inversion in the Yrast Band of ¹⁶⁴Ta

NUCLEAR REACTIONS ¹⁴²Nd(²⁷Al, 5n), E=150 MeV; ¹⁴¹Pr(²⁸Si, 4n), E=142 MeV; measured Eγ, Iγ, γγ-coin. ¹⁶⁴Ta deduced high-spin levels, J, π, B(M1)/B(E2), configurations. Cranked mean-field calculations.

doi: 10.1103/PhysRevC.65.014308
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2001SA56      Acta Phys.Pol. B32, 2441 (2001)

W.Satula, R.A.Wyss

Cranking in Isospace - Towards a Consistent Mean-Field Description of N = Z Nuclei

2001WY02      Acta Phys.Pol. B32, 2457 (2001)

R.A.Wyss, W.Satula

Rotating N = Z Nuclei - A Probe to the t = 0 and t = 1 Pairing Correlations

NUCLEAR STRUCTURE ⁶⁸Se, ⁷²Kr, ⁷⁶Sr, ⁸⁰Zr, ⁸⁴Mo, ⁸⁸Ru; calculated rotational bands routhians, moments of inertia, related features, role of pairing correlations.

1999PE19      Phys.Rev. C60, 064313 (1999)

S.Perries, A.Astier, L.Ducroux, M.Meyer, N.Redon, C.M.Petrache, D.Bazzacco, G.Falconi, S.Lunardi, M.Lunardon, C.Rossi Alvarez, C.A.Ur, R.Venturelli, G.Viesti, I.Deloncle, M.G.Porquet, G.de Angelis, M.de Poli, C.Fahlander, E.Farnea, D.Foltescu, A.Gadea, D.R.Napoli, Zs.Podolyak, A.Bracco, S.Frattini, S.Leoni, B.Cederwall, A.Johnson, R.A.Wyss

Decay-Out of the Yrast Superdeformed Band in ¹³⁶Nd: Towards an experimental extraction of the neutron pairing gap at large deformation

NUCLEAR REACTIONS ¹¹⁰Pd(³⁰Si, 4n), E=130 MeV; measured Eγ, Iγ, γγ-coin. ¹³⁶Nd deduced high-spin levels, J, π, superdeformed band, discrete linking transitions, pairing features. Eurogam III array. Comparisons with neighboring isotopes.

doi: 10.1103/PhysRevC.60.064313
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1999PE24      Nucl.Phys. (Supplement) A654, 714c (1999)

S.Perries, A.Astier, L.Ducroux, M.Meyer, N.Redon, C.M.Petrache, D.Bazzacco, G.Falconi, S.Lunardi, M.Lunardon, C.Rossi Alvarez, C.A.Ur, R.Venturelli, G.Viesti, I.Deloncle, M.G.Porquet, G.de Angelis, M.de Poli, C.Fahlander, E.Farnea, D.Foltescu, A.Gadea, D.R.Napoli, Zs.Podolyak, A.Bracco, S.Frattini, S.Leoni, B.Cederwall, A.Johnson, R.A.Wyss

Decay-Out of the Yrast Superdeformed Band in ¹³⁶Nd: Towards an experimental extraction of the neutron pairing gap in the second well

NUCLEAR REACTIONS ¹¹⁰Pd(³⁰Si, 4n), E=130 MeV; measured Eγ, γγ-coin. ¹³⁶Nd deduced high-spin levels, J, π, superdeformed band linking transitions, pairing correlations effects. Comparison with strong-coupling model. Euroball III array.

doi: 10.1016/S0375-9474(00)88533-4
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1993MU09      Phys.Lett. 312B, 272 (1993)

S.M.Mullins, J.Nyberg, A.Maj, M.S.Metcalfe, P.J.Nolan, P.H.Regan, R.Wadsworth, R.A.Wyss

Population Effects in the Highly-Deformed Bands of ¹³¹Ce and ¹³⁵Nd from ^18,16O-Induced Reactions

NUCLEAR REACTIONS ¹¹⁷Sn(¹⁸O, 4n), E=85 MeV; measured Eγ, Iγ, γγ-coin, DSA. ¹²²Te(¹⁶O, 3n), E=85 MeV; measured Eγ, Iγ, γγ-coin. ¹³¹Ce, ¹³⁵Nd deduced levels, J, π, highly deformed band structure.

doi: 10.1016/0370-2693(93)91080-7
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1992MU09      Phys.Rev. C45, 2683 (1992)

S.M.Mullins, I.Jenkins, Y.-J.He, A.J.Kirwan, P.J.Nolan, J.R.Hughes, R.Wadsworth, R.A.Wyss

Second Minimum Lifetime Measurements in ¹³³Nd and ¹³⁷Nd

NUCLEAR REACTIONS ¹⁰⁵Pd(³²S, 2n2p), E=152 MeV; ¹⁰⁴Ru(³⁶S, 3n), E=145 MeV; measured γγ-coin, DSA, centroid shifts. ^133,137Nd deduced levels, T_1/2, deformed band quadrupole moments. Total Routhian surface calculations.

doi: 10.1103/PhysRevC.45.2683
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1991LI18      Phys.Rev. C44, R578 (1991)

Y.Liang, D.B.Fossan, J.R.Hughes, D.R.LaFosse, T.Lauritsen, R.Ma, E.S.Paul, P.Vaska, M.P.Waring, N.Xu, R.A.Wyss

Band Termination in ¹²¹I

NUCLEAR REACTIONS ¹¹⁴Cd(¹¹B, 4n), E=51 MeV; measured γγ-coin. ¹²¹I deduced levels, J, π, band structure, configuration. Total Routhian surface calculation.

doi: 10.1103/PhysRevC.44.R578
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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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1990LI22      Phys.Rev. C42, 890 (1990)

Y.Liang, R.Ma, E.S.Paul, N.Xu, D.B.Fossan, R.A.Wyss

Rotational Band Structures in ¹²⁷Cs: Shape changes induced by h_11/2 neutron aligment

NUCLEAR REACTIONS ¹²⁰Sn(¹¹B, 4n), E=50 MeV; measured γγ-coin, γ(θ). ¹²⁷Cs deduced levels, J, π, γ-multipolarity, band structure. Cranked shell model.

doi: 10.1103/PhysRevC.42.890
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1990MA07      Phys.Rev. C41, 717 (1990)

R.Ma, Y.Liang, E.S.Paul, N.Xu, D.B.Fossan, L.Hildingsson, R.A.Wyss

Competing Proton and Neutron Rotational Alignments: Band Structures in ¹³¹Ba

NUCLEAR REACTIONS ¹²²Sn(¹³C, 4n), E=57 MeV; measured Eγ, Iγ, γ(θ), γγ(θ). ¹³¹Ba deduced levels, J, π, γ-multipolarity, δ. Cranking model calculations.

doi: 10.1103/PhysRevC.41.717
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1989GO06      J.Phys.(London) G15, 671 (1989)

M.J.Godfrey, Y.He, I.Jenkins, A.Kirwan, P.J.Nolan, D.J.Thornley, S.M.Mullins, R.Wadsworth, R.A.Wyss

Collective Oblate Structure in the Odd-Odd Isotopes ^128,130La

NUCLEAR REACTIONS ⁹⁵Mo(³⁶S, 2np), E=135, 145 MeV; measured γγ-coin. ¹¹⁵In(¹⁶O, 3n), E=68 MeV; measured γ(θ). ⁵¹V(⁸²Se, 3n), E=290 MeV; measured γγ-coin, γ-spectra. ^128,130La deduced levels, J, π, γ-branching, B(λ) ratios.

doi: 10.1088/0954-3899/15/5/019
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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.