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NSR database version of April 11, 2024.

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2024DO02      Phys.Rev. C 109, 034615 (2024)

T.Dossing, S.AAberg, M.Albertsson, B.G.Carlsson, J.Randrup

Angular momentum in fission fragments

doi: 10.1103/PhysRevC.109.034615
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2023CO04      Phys.Rev. C 107, L021301 (2023)

D.M.Cox, A.Saamark-Roth, D.Rudolph, L.G.Sarmiento, R.M.Clark, J.L.Egido, P.Golubev, J.Heery, A.Yakushev, S.AAberg, H.M.Albers, M.Albertsson, M.Block, H.Brand, T.Calverley, R.Cantemir, B.G.Carlsson, Ch.E.Dullmann, J.Eberth, C.Fahlander, U.Forsberg, J.M.Gates, F.Giacoppo, M.Gotz, S.Gotz, R.-D.Herzberg, Y.Hrabar, E.Jager, D.Judson, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, L.Lens, J.Ljungberg, B.Lommel, J.Louko, C.-C.Meyer, A.Mistry, C.Mokry, P.Papadakis, E.Parr, J.L.Pore, I.Ragnarsson, J.Runke, M.Schadel, H.Schaffner, B.Schausten, D.A.Shaughnessy, P.Thorle-Pospiech, N.Trautmann, J.Uusitalo

Spectroscopy along flerovium decay chains. II. Fine structure in odd-A 289Fl

RADIOACTIVITY 289Fl(α) [from 244Pu(48Ca, X), E=6.02 MeV/nucleon]; 285Cn(α) [from 289Fl(α)]; 281Ds(α) [from 285Cn(α)]; 277Hs(SF) [from 281Ds(α)]; measured decay products, Eα, Iα, Eβ, Iβ αβ-coin, αα-coin, (fragment)αα-coin; deduced Q-values, T1/2, branching ratios, hindrance factor. 289Fl, 285Cn, 281Ds; deduced J, π and δ assignments based on the derived decay path. Comparison with structure calculations based on the symmetry-conserving configuration mixing theory. Gas-filled recoil separator TASCA was used to transmit, select, and focus the flerovium ions into an upgraded version of the TASISpec decay station consisting of implantation DSSD, veto DSSD and set of HPGe detectors (GSI).

doi: 10.1103/PhysRevC.107.L021301
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2023SA03      Phys.Rev. C 107, 024301 (2023)

A.Saamark-Roth, D.M.Cox, D.Rudolph, L.G.Sarmiento, M.Albertsson, B.G.Carlsson, J.L.Egido, P.Golubev, J.Heery, A.Yakushev, S.AAberg, H.M.Albers, M.Block, H.Brand, T.Calverley, R.Cantemir, R.M.Clark, Ch.E.Dullmann, J.Eberth, C.Fahlander, U.Forsberg, J.M.Gates, F.Giacoppo, M.Gotz, S.Gotz, R.-D.Herzberg, Y.Hrabar, E.Jager, D.Judson, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, L.Lens, J.Ljungberg, B.Lommel, J.Louko, C.-C.Meyer, A.Mistry, C.Mokry, P.Papadakis, E.Parr, J.L.Pore, I.Ragnarsson, J.Runke, M.Schadel, H.Schaffner, B.Schausten, D.A.Shaughnessy, P.Thorle-Pospiech, N.Trautmann, J.Uusitalo

Spectroscopy along flerovium decay chains. III. Details on experiment, analysis, 282Cn, and spontaneous fission branches

RADIOACTIVITY 290,288,286,284Fl(α)(SF) [from 244Pu(48Ca, X), E=6.02 MeV/nucleon]; 282Cn(α)(SF) [286Fl(α)]; 284Cn(α)(SF) [from 288Fl(α)]; 286Cn(α)(SF) [290Fl(α)]; 282Ds(α)(SF) [from 286Cn(α)]; 280Ds(α)(SF) [from 284Cn(α)]; measured decay products, Eα, Iα, Eβ, Iβ αβ-coin, αα-coin, (fragment)αα-coin; deduced Q-values, T1/2, branching ratios, hindrance factor. 282Cn; deduced levels, J, π, T1/2 of excited states, transition rates, monopole transition strengths. Comparison to macroscopic-microscopic finite-range liquid-drop model, self-consistent Hartree-Fock-Bogoliubov calculations and other experimental data. Gas-filled recoil separator TASCA was used to transmit, select, and focus the flerovium ions into an upgraded version of the TASISpec decay station consisting of implantation DSSD, veto DSSD and set of HPGe detectors (GSI).

doi: 10.1103/PhysRevC.107.024301
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2021AL03      Phys.Rev. C 103, 014609 (2021)

M.Albertsson, B.G.Carlsson, T.Dossing, P.Moller, J.Randrup, S.Aberg

Correlation studies of fission-fragment neutron multiplicities

NUCLEAR REACTIONS 235U(n, F), E=0, 5.55 MeV; calculated total fragment kinetic energy (TKE) and distribution of TKE versus heavy-fragment mass number, number of scission events in log scale versus fission fragment mass number and total kinetic energy (TKE), probability distribution for the heavy-fragment share of intrinsic energy, average of the light and heavy-fragment intrinsic energies, average fragment distortion energies and deformations at scission versus TKE, average multiplicity of neutrons evaporated from the light or heavy fragment as function of TKE. Nuclear shape evolution from the ground-state shape to scission obtained from METROPOLIS walk method on the five-dimensional potential-energy surfaces, calculated with the macroscopic-microscopic method for the three-quadratic-surface (3QS) parametrization.

doi: 10.1103/PhysRevC.103.014609
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2021AL31      Phys.Rev. C 104, 064616 (2021)

M.Albertsson, B.G.Carlsson, T.Dossing, P.Moller, J.Randrup, S.Aberg

Super-short fission mode in fermium isotopes

RADIOACTIVITY 256,258,260,262Fm(SF); calculated potential energy along the paths for the standard and the super-short fission modes, as function of quadrupole moment. 260Fm(SF); calculated contour plots of the number of fission in the A-TKE plane based on 105 spontaneous or thermal fission events. 254,256,258,260,262,264,266,268Fm(SF); calculated contour plot of fraction of fissions via the super-short mode, with typical scission shapes for the two modes. 254,256,258,260Fm(SF); calculated primary fragment mass yields for spontaneous and thermal fission, total kinetic-energy (TKE) distributions. 254,256,258,260,262,264,266,268Fm, 259,260Md(SF); calculated TKE and average total neutron multiplicity versus the neutron number of the initial nucleus. Metropolis method for the super-short fission mode to simulate the strongly damped fission dynamics driven by shape- and energy-dependent level densities, and analyzing scission configurations. Comparison with experimental data.

doi: 10.1103/PhysRevC.104.064616
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2021SA01      Phys.Rev.Lett. 126, 032503 (2021)

A.Samark-Roth, D.M.Cox, D.Rudolph, L.G.Sarmiento, B.G.Carlsson, J.L.Egido, P.Golubev, J.Heery, A.Yakushev, S.Aberg, H.M.Albers, M.Albertsson, M.Block, H.Brand, T.Calverley, R.Cantemir, R.M.Clark, C.E.Dullmann, J.Eberth, C.Fahlander, U.Forsberg, J.M.Gates, F.Giacoppo, M.Gotz, S.Gotz, R.-D.Herzberg, Y.Hrabar, E.Jager, D.Judson, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, L.Lens, J.Ljungberg, B.Lommel, J.Louko, C.-C.Meyer, A.Mistry, C.Mokry, P.Papadakis, E.Parr, J.L.Pore, I.Ragnarsson, J.Runke, M.Schadel, H.Schaffner, B.Schausten, D.A.Shaughnessy, P.Thorle-Pospiech, N.Trautmann, J.Uusitalo

Spectroscopy along Flerovium Decay Chains: Discovery of 280Ds and an Excited State in 282Cn

RADIOACTIVITY 286,288Fl, 284Cn(α), 282Cn, 280Ds(SF) [from 242,244Pu(48Ca, X)286Fl/288Fl, E=6.021 MeV/nucleon]; measured decay products, Eα, Iα, Eβ, Iβ α-β coin.; deduced Q-values, T1/2, J, π. Comparison with theoretical calculations. The gas-filled separator TASCA at the GSI.

doi: 10.1103/PhysRevLett.126.032503
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2021SE22      Phys.Rev. C 104, 044327 (2021)

A.P.Severyukhin, S.Aberg, N.N.Arsenyev, R.G.Nazmitdinov

Hybrid model for the damped transient response of giant dipole resonances

NUCLEAR STRUCTURE 206Hg, 206Pb, 210Po; calculated dipole-strength distributions built on the one-phonon strength distribution folded with the energy-dependent Lorentzian, the microscopic phonon-phonon coupling (PPC) approach, and the random coupling matrix elements between the one- and two-phonon configurations (doorway model), centroid energies and the spreading widths Γ of giant-dipole resonance (GDR) in 9.5-18.5 MeV range using quasiparticle random phase approximation (QRPA) based on Skyrme mean field interactions, PPC, and random distribution of coupling matrix elements, and a hybrid model, cumulative level densities of one-phonon and two-phonon states using QRPA and modified Fermi gas model with uniformly spaced states, energy-dependent energy shift for 210Po. 206Hg, 210Po; empirical systematics of the centroid energies and widths of dipole-strength distributions.

doi: 10.1103/PhysRevC.104.044327
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2021YA34      Int.J.Mod.Phys. E30, 2150099 (2021)

A.Yadav, A.Shukla, S.Aberg

Bubble structure in superheavy nuclei around neutron and proton shell closure

NUCLEAR STRUCTURE 254,256,258,260,262Rf, 258,260,262,264,266Sg, 264,266Hs, 270Hs, 270Ds, 282,284Cn, 284,286,288Fl, 290,292Lv, 294Og; calculated energy levels, J, π, deformation parameters, two-neutron separation energies, charge and neutron radii, neutron skin.

doi: 10.1142/S0218301321500993
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2020AB12      Int.J.Mod.Phys. E29, 2050073 (2020)

S.Aberg, A.Yadav, A.Shukla

Possible dual bubble-like structure predicted by the relativistic Hartree-Bogoliubov model

NUCLEAR STRUCTURE 43Si, 12O, 62Ni, 26,28O, 32,34Ne, 38,40Mg, 42,44Si, 46,48S, 50,52Ar, 56,58Ca, 60,62Ti, 66,68Cr, 72,74,76,78,80Ni; calculated binding energies, radial density distributions, neutron and proton single-particle energy levels, pairing strengths. Comparison with available data.

doi: 10.1142/S0218301320500731
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2020AL01      Eur.Phys.J. A 56, 46 (2020)

M.Albertsson, B.G.Carlsson, T.Dossing, P.Moller, J.Randrup, S.Aberg

Calculated fission-fragment mass yields and average total kinetic energies of heavy and superheavy nuclei

doi: 10.1140/epja/s10050-020-00036-9
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2020BE28      J.Phys.(London) G47, 113002 (2020)

M.Bender, R.Bernard, G.Bertsch, S.Chiba, J.Dobaczewski, N.Dubray, S.A.Giuliani, K.Hagino, D.Lacroix, Z.Li, P.Magierski, J.Maruhn, W.Nazarewicz, J.Pei, S.Peru, N.Pillet, J.Randrup, D.Regnier, P.G.Reinhard, L.M.Robledo, W.Ryssens, J.Sadhukhan, G.Scamps, N.Schunck, C.Simenel, J.Skalski, I.Stetcu, P.Stevenson, S.Umar, M.Verriere, D.Vretenar, M.Warda, S.Aberg

Future of nuclear fission theory

doi: 10.1088/1361-6471/abab4f
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2020RU03      Phys.Rev. C 102, 014313 (2020)

D.Rudolph, I.Ragnarsson, S.AAberg, C.Andreoiu, M.P.Carpenter, R.M.Clark, J.Ekman, C.Fahlander, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, D.G.Sarantites, D.Seweryniak, C.E.Svensson

Onset of high-spin rotational bands in the N=Z nucleus 62Ga

NUCLEAR REACTIONS 40Ca(28Si, npα), E=122 MeV; measured Eγ, Iγ, (particle)γ- and γγ-coin, γγ(θ)(DCO) using the Gammasphere array and the 4π Microball system for charged particle detection at the ANL-ATLAS facility. 62Ga; deduced high-spin levels, J, π, multipolarities, band structures, alignments, and configurations; calculated energy surface contours in (ϵ2, γ) plane. Comparison with cranked Nilsson-Strutinsky (CNS) calculations.

doi: 10.1103/PhysRevC.102.014313
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2020SE15      Phys.Atomic Nuclei 83, 171 (2020)

A.P.Severyukhin, N.N.Arsenyev, I.N.Borzov, R.G.Nazmitdinov, S.Aberg

On Statistical Properties of the Gamow-Teller Strength Distribution in 60Ca

doi: 10.1134/S106377882002026X
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2019DO07      Eur.Phys.J. A 55, 249 (2019)

T.Dossing, S.Aberg

Collective enhancements in nuclear level densities

doi: 10.1140/epja/i2019-12890-3
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2019WA27      Phys.Rev. C 100, 034301 (2019)

D.E.Ward, B.G.Carlsson, P.Moller, S.AAberg

Global microscopic calculations of odd-odd nuclei

NUCLEAR STRUCTURE Z=8-100, N=8-156; calculated ground-state Jπ for odd-A nuclei from the lowest-energy proton or neutron quasiparticle. 158,160Tb, 164,166Ho, 168,170Tm, 174,176Lu, 182Ta, 186,188Re, 234,236Pa, 238Np, 240,242,244Cm, 250Bk; calculated excitation energies of the 2-qp bandheads, bandhead splittings in rare-earth nuclei and actinides using Folded-Yukawa quasiparticles-plus-rotor model with three different residual interactions. 50Sc, 90Y, 208,210Bi; calculated low-lying multiplets in the spherical nuclei. 174,176Lu, 180,182Ta; calculated low-lying rotational bands and K=0 bands. 248,250,252,254,256Es, 256Md; predicted ground-state spins of superheavy nuclei. Z=101-119, N=138-182; calculated Q(α) values for odd-odd superheavy nuclei. Macroscopic-microscopic finite-range droplet model combined with particle-rotor coupling model order to describe low-energy spectra of odd-odd nuclei, using different interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.100.034301
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2018SE11      Phys.Rev. C 97, 059802 (2018)

A.P.Severyukhin, S.Aberg, N.N.Arsenyev, R.G.Nazmitdinov

Reply to "Comment on 'Spreading widths of giant resonances in spherical nuclei: Damped transient response'"

NUCLEAR STRUCTURE 208Pb; calculated distribution of coupling matrix elements between the one- and two-phonon configurations, and B(E1) and B(E2) strength distributions for the isovector giant dipole resonance (IVGDR) and isoscalar giant quadrupole resonance (ISGQR) using random matrix distribution of phonon-phonon coupling in random-phase approximation.

doi: 10.1103/PhysRevC.97.059802
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2018SE18      Phys.Rev. C 98, 044319 (2018)

A.P.Severyukhin, S.AAberg, N.N.Arsenyev, R.G.Nazmitdinov

Damped transient response of the giant dipole resonance in the lead region

NUCLEAR STRUCTURE 206Hg, 204,206,208Pb, 210Po; analyzed strength distributions of 1- states in the region of isovector giant-dipole resonance (IVGDR) and energy interval of 9.5-18.5 MeV using quasi-random phase approximation (QRPA) based on Skyrme mean field and SLy4 interaction, with the volume pairing interaction treated in the BCS approximation. Comparison of centroid energies and spreading widths from microscopic coupling of one- and two-phonon states with those from random matrix approach to this coupling, and with experimental data.

doi: 10.1103/PhysRevC.98.044319
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2017BA23      Phys.Atomic Nuclei 80, 402 (2017)

A.Bajpeyi, A.Shukla, A.J.Koning, S.Aberg

Study of the (p, γ) and (α, γ) reactions for 96, 98, 104Ru and 112, 114, 116Sn at astrophysically relevant energies

doi: 10.1134/S1063778817030024
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2017SE10      Phys.Rev. C 95, 061305 (2017)

A.P.Severyukhin, S.Aberg, N.N.Arsenyev, R.G.Nazmitdinov

Spreading widths of giant resonances in spherical nuclei: Damped transient response

NUCLEAR STRUCTURE 132Sn, 208Pb, 310126; analyzed centroid energies, spreading widths Γ for isoscalar giant monopole resonances (ISGMR), isovector giant dipole resonances (IVGDR), and isoscalar giant quadrupole resonances (ISGQR), B(E1) strength distributions using RPA based on the Skyrme mean field. Comparison of spreading widths obtained by means of the microscopic coupling of one- and two-phonon states with those obtained by means of the random matrix approach to this coupling. Comparison with experimental data.

doi: 10.1103/PhysRevC.95.061305
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2017SH02      J.Phys.(London) G44, 025104 (2017)

A.Shukla, S.Aberg, A.Bajpeyi

Systematic nuclear structure studies using relativistic mean field theory in mass region A ∼ 130

NUCLEAR STRUCTURE 100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132,134,136Sn, 134Te, 136Xe, 138Ba, 140Ce, 142Nd, 144Sm, 146Gd, 148Dy, 150Er, 152Yb, 154Hf; calculated binding energies, charge radii, neutron and proton occupation probabilities, neutron skin, density distributions. Comparison with available data.

doi: 10.1088/1361-6471/aa5117
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2017SR01      Phys.Rev. C 95, 011303 (2017)

P.C.Srivastava, S.AAberg, I.Ragnarsson

Triaxial rotation-axis flip triggered by an isoscalar np pair

NUCLEAR STRUCTURE 64Ge, 66As; calculated total-energy surfaces in (ϵ2, γ) plane, levels, J, π of ground-state band (T=0) of 64Ge and 9+ (T=1) band in 66As, intrinsic and spectroscopic quadrupole moments, B(E2). Cranked Nilsson-Strutinsky (CNS) model. Comparison with experimental data.

doi: 10.1103/PhysRevC.95.011303
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2017WA08      Phys.Rev. C 95, 024618 (2017)

D.E.Ward, B.G.Carlsson, T.Dossing, P.Moller, J.Randrup, S.AAberg

Nuclear shape evolution based on microscopic level densities

NUCLEAR REACTIONS 226Th, 234,236U, 240Pu(γ, F), (n, F), E(n)=thermal; calculated yield of fragments as function of proton number and angular momentum and excitation energy using parameter-free microscopic level densities obtained with the Metropolis-walk method. Comparison with experimental data.

NUCLEAR STRUCTURE 236U; calculated microscopic level density as a function of angular momentum and excitation energy, potential-energy curves and mass asymmetry versus elongation using Metropolis walk, combinatorial method.

doi: 10.1103/PhysRevC.95.024618
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2016FO10      Nucl.Phys. A953, 117 (2016)

U.Forsberg, D.Rudolph, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, C.Fahlander, J.M.Gates, P.Golubev, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, L.G.Sarmiento, M.Schadel, A.Yakushev, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, J.Dobaczewski, K.Eberhardt, J.Even, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, W.Nazarewicz, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, Y.Shi, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Recoil-α-fission and recoil-α-α- fission events observed in the reaction 48Ca + 243Am

NUCLEAR REACTIONS 243Am(48Ca, x), E=242.1, 245.0 MeV; measured reaction products, fission products, Eα, Iα(t), αα-coin, (recoil)α-coin, En, In using He-gas filled TASCA, TASISpec based on DSSSDs, other DSSSDs; deduced correlation times, α energy spectra, 23 α-decay chains of five α's and α+3n, fragments T1/2. Discussed existence of long decay chains; compared with published results.

RADIOACTIVITY 289,288Mc, 284Nh, 280Rg, 276Mt, 272Bh(α), 268Db(SF); measured decay products, Eα, Iα; deduced T1/2. Comparison with available data.

doi: 10.1016/j.nuclphysa.2016.04.025
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2016FO16      Phys.Lett. B 760, 293 (2016)

U.Forsberg, D.Rudolph, C.Fahlander, P.Golubev, L.G.Sarmiento, S.Aberg, M.Block, Ch.E.Dullmann, F.P.Hessberger, J.V.Kratz, A.Yakushev

A new assessment of the alleged link between element 115 and element 117 decay chains

NUCLEAR STRUCTURE 293Ts, 289Mc; analyzed available data; deduced cross-reaction link between α-decay chains.

doi: 10.1016/j.physletb.2016.07.008
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2015AB07      Nucl.Phys. A941, 97 (2015)

S.Aberg, B.G.Carlsson, Th.Dossing, P.Moller

The role of seniority-zero states in nuclear level densities

NUCLEAR STRUCTURE 156,158Gd, 168Ho, 168Er, 176Lu, 182Ta; calculated level densities with specified angular momentum for seniority-zero, states, number of states, rotational bands, distribution of K quantum number. 40Ca, 208Pb;A=100-148; calculated level density, number of states for spherical and prolate nuclei vs angular momentum. Fermi-gas model and combinatorial level density with BCS.

doi: 10.1016/j.nuclphysa.2015.05.009
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2015BA56      Eur.Phys.J. A 51, 157 (2015)

A.Bajpeyi, A.J.Koning, A.Shukla, S.Aberg

Systematic study of proton capture rates for Mo and Cd isotopes

doi: 10.1140/epja/i2015-15157-1
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2015RU11      J.Radioanal.Nucl.Chem. 303, 1185 (2015)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Selected spectroscopic results on element 115 decay chains

RADIOACTIVITY 288Mc, 284Nh, 280Rg, 276Mt, 272Bh(α), 268Db(SF); measured decay products, Eα, Iα; deduced Q-values, level energies, branching ratios. Comparison with GEANT4 Monte-Carlo simulations.

doi: 10.1007/s10967-014-3445-y
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2015WA20      Phys.Rev. C 92, 014314 (2015)

D.E.Ward, B.G.Carlsson, S.AAberg

α-decay spectra of odd nuclei using the effective Skyrme interaction

RADIOACTIVITY 145Pm, 147Sm, 147Eu, 149,149mTb, 187,189,191,193,195,197,199,201,201m,203,205,207,209,211,213,215,217Po, 203,205,207,209,211,213At, 207,209,211Rn, 207,209,211,213Fr, 213Ra(α); analyzed experimental data for partial half-lives and reduced widths, compared with calculated microscopic reduced widths using SLy4 and surface pairing. 279,281,283,285,287,289,291,293Bh, 281,283,285,287,289,291,293Hs, 281,283,285,287,289,291,293,295Mt, 283,285,287,289,291,293,295Ds, 283,285,287,289,291,293,295,297Rg, 285,287,289,291,293,295,297,299Cn, 285,287,289,291,293,295,297,299Nh, 287,289,291,293,295,297,299,301Fl, 287,289,291,293,295,297,299,301Mc, 289,291,293,295,297,299,301,303Lv, 289,291,293,295,297,299,301,303Ts, 291,293,295,297,299,301,303,305Og, 291,293,295,297,299,301,303,305119, 293,295,297,299,301,303,305,307120, 280,282,284,286,288,290,292,294Hs, 282,284,286,288,290,292,294,296Ds, 284,286,288,290,292,294,296,298Cn, 286,288,290,292,294,296,298,300Fl, 288,290,292,294,296,298,300,302Lv, 290,292,294,296,298,300,302,304Og, 292,294,296,298,300,302,304,306120(α); calculated Q(α) values, half-lives and reduced widths for superheavy odd-A and even-even nuclei using axially deformed Skyrme-HFB. R-matrix-type microscopic formalism for the calculation of the decay rate, using HFB wave functions obtained with SLy4 Skyrme effective interaction.

NUCLEAR STRUCTURE 208Pb, 298Fl; calculated HF single-particle energies for 208Pb and Nilsson diagrams for neutron and proton levels using SLy4.

doi: 10.1103/PhysRevC.92.014314
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2014RU04      Acta Phys.Pol. B45, 263 (2014)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Alpha-Photon Coincidence Spectroscopy Along Element 115 Decay Chains

RADIOACTIVITY 287,288Mc, 283,284Nh, 279,280Rg, 275,276Mt, 271,272Bh(α), 267,268Db(SF) [from 243Am(48Ca, X), E not given]; measured decay products, Eα, Iα, Eγ, Iγ, X-rays; deduced T1/2, correlated α-decay chains. Comparison with available data.

doi: 10.5506/APhysPolB.45.263
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2014SH03      Phys.Rev. C 89, 014329 (2014)

A.Shukla, S.AAberg

Deformed bubble nuclei in the light-mass region

NUCLEAR STRUCTURE 24Ne, 32Si, 32Ar; investigated possibility for existence of deformed bubble nuclei. 24,26,28,30,32,34Si, 24Ne, 32Ar, 36S, 36Ca; calculated proton depletion fractions as function of deformation for Z=14 nuclei. 24Ne, 26Mg, 28Si, 30S, 32Ar, 34,36Ca; calculated neutron depletion fractions as function of deformation for N=14 nuclei. 32Si; calculated neutron and proton density contour plots. 24Ne, 32,34Si, 32Ar; calculated binding energy per nucleon, neutron, rms charge and rms matter radii. Relativistic mean field (RMF) model. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.014329
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2014WA55      Phys.Scr. 89, 054027 (2014)

D.E.Ward, B.G.Carlsson, S.Aberg

Alpha-particle formation and decay rates from Skyrme-HFB wave functions

RADIOACTIVITY 212Po(α); calculated α-particle formation amplitude, α-decay width using R-matrix with HFB wavefunctions with Skyrme interactions. Decay width compared to data.

doi: 10.1088/0031-8949/89/5/054027
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2013RU11      Phys.Rev.Lett. 111, 112502 (2013)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, F.P.Hessberger, R.-D.Herzberg, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Spectroscopy of Element 115 Decay Chains

RADIOACTIVITY 288Mc, 284Nh, 280Rg, 276Mt, 272Bh(α) [from 243Am(48Ca, X), E=5.4 MeV/nucleon]; measured decay products, Eα, Iα, Eγ, Iγ, X-rays. 280Rg, 276Mt; deduced T1/2, Q-value, α-decay scheme. Comparison with Monte Carlo calculations.

doi: 10.1103/PhysRevLett.111.112502
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2013UH01      Nucl.Phys. A913, 127 (2013)

H.Uhrenholt, S.Aberg, A.Dobrowolski, Th.Dossing, T.Ichikawa, P.Moller

Combinatorial nuclear level-density model

NUCLEAR STRUCTURE 60Co, 68Zn, 76,78,80,82,84,86Sr, 94Nb, 97,98Mo, 107,109,111,112,113,114,115,117Cd, 127Te, 148Pm, 148,149Sm, 155Eu, 161,162Dy, 166,167Er, 169,170,171,172,173,174,175,177Yb, 194Ir, 237U, 239Pu; calculated level density, angular momentum distribution, parity ratio, pairing gap. 90Zr, 90Nb; calculated J, π level density. A=20-255; calculated level density at neutron separation energy, vibrational enhancement. Combinatorial (microcanonical) model with folded Yukawa, pairing, rotational and vibrational states. Compared with available data.

doi: 10.1016/j.nuclphysa.2013.06.002
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2013WA30      Phys.Rev. C 88, 064316 (2013)

D.E.Ward, B.G.Carlsson, S.AAberg

α-decay calculations of heavy nuclei using an effective Skyrme interaction

NUCLEAR STRUCTURE 208Pb; calculated neutron and proton densities by solving the HFB equations using a spherical oscillator basis.

RADIOACTIVITY 210Pb, 210,212Po(α); calculated decay widths for different sizes of the oscillator basis, and three different Skyrme forces, effect on decay rate with the Lipkin-Nogami (LN) procedure, HFB+LN and HFB approaches density dependence of pairing forces. 194,196,198,200,202,204,206,208,210,212,214,216,218Po, 202,204,206,208,210,212,214,216,218Rn, 206,208,210,212,214,216,218Ra, 144Nd, 146Sm, 148Gd, 150Dy, 152,154Er, 154,156Yb, 156,158Hf, 158,160W, 162Os, 294,296,298,300Fl, 294,296,298,300Fl, 306,308,310,312126(α); calculated α decay widths, half-lives of Fl and Z=126 isotopes. Nuclear ground states calculated with the Hartree-Fock-Bogoliubov (HFB) method with Skyrme interaction. Microscopic α-decay formation amplitudes calculated from HFB wave functions, and α widths with R-matrix formalism. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.064316
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2011SH26      J.Phys.(London) G38, 095103 (2011)

A.Shukla, S.Aberg, S.K.Patra

Nuclear structure and reaction properties of even-even oxygen isotopes towards drip line

NUCLEAR STRUCTURE 12C, 12,14,16,18,20,22,24,26,28O; calculated rms matter and charge radii, deformations, two neutron separation energies.

NUCLEAR REACTIONS 12C(12O, X), (14O, X), (16O, X), (18O, X), (20O, X), (22O, X), (24O, X), (26O, X), (28O, X), E=1000 MeV/nucleon; calculated σ.

doi: 10.1088/0954-3899/38/9/095103
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2009AB18      Int.J.Mod.Phys. E18, 926 (2009)

S.Aberg, H.Uhrenholt, T.Ichikawa, P.Moller

Chaos and structure of level densities

NUCLEAR STRUCTURE 79Cu, 162Dy, 172Yb; calculated level density.

doi: 10.1142/S0218301309013063
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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, 238,239,241,242,243Am; 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, 242,244,246,248Es, 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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2008KO01      Phys.Rev. C 77, 014305 (2008)

V.M.Kolomietz, S.Aberg, S.V.Radionov

Collective motion in a quantum diffusive environment

RADIOACTIVITY 236U(SF); calculated saddle-to-scission time and scission energy for symmetric fission.

NUCLEAR STRUCTURE 236U; calculated collective classical variable and quantum mechanical occupancies of nuclear states, level spacings. Collective model.

doi: 10.1103/PhysRevC.77.014305
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2006JU01      Phys.Rev. C 73, 044327 (2006)

A.Juodagalvis, I.Ragnarsson, S.Aberg

Cranked Nilsson-Strutinsky vs the spherical shell model: A comparative study of pf-shell nuclei

NUCLEAR STRUCTURE 44,45,46Ti, 47V, 48,49Cr; calculated rotational band energies, configurations, deformation, signature splitting, related features. Comparison of unpaired cranked Nilsson-Strutinsky and spherical shell model approaches.

doi: 10.1103/PhysRevC.73.044327
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2006JU06      Phys.Scr. T125, 198 (2006)

A.Juodagalvis, I.Ragnarsson, S.Aberg

Pairing and signature splitting in pf-shell nuclei

NUCLEAR STRUCTURE 45Ti, 47V, 49Cr; calculated rotational band level energies, signature splitting. Cranked Nilsson-Strutinsky model.

doi: 10.1088/0031-8949/2006/T125/049
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2006OG06      Phys.Scr. T125, 37 (2006)

M.Ogren, Y.Yu, S.Aberg, S.M.Reimann, M.Brack

Super-shell structure in harmonically trapped fermionic gases and its semi-classical interpretation

doi: 10.1088/0031-8949/2006/T125/008
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2006OL01      Phys.Rev.Lett. 96, 042502 (2006)

H.Olofsson, S.Aberg, O.Bohigas, P.Leboeuf

Correlation in Nuclear Masses

ATOMIC MASSES A=20-250; analyzed differences between measured and calculated masses; deduced chaotic dynamics effects.

doi: 10.1103/PhysRevLett.96.042502
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2006OL08      Phys.Scr. T125, 162 (2006)

H.Olofsson, S.Aberg, O.Bohigas, P.Leboeuf

Correlations and chaotic motion in nuclear masses

doi: 10.1088/0031-8949/2006/T125/037
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2006RU02      Phys.Rev.Lett. 96, 092501 (2006)

D.Rudolph, B.G.Carlsson, I.Ragnarsson, S.Aberg, C.Andreoiu, M.A.Bentley, M.P.Carpenter, R.J.Charity, R.M.Clark, M.Cromaz, J.Ekman, C.Fahlander, P.Fallon, E.Ideguchi, A.O.Macchiavelli, M.N.Mineva, W.Reviol, D.G.Sarantites, D.Seweryniak, S.J.Williams

58Ni: An Unpaired Band Crossing at New Heights of Angular Momentum for Rotating Nuclei

NUCLEAR REACTIONS 28Si(32S, 2p), E=130 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin. 58Ni deduced high-spin levels, J, π, configurations, unpaired band crossing. Gammasphere, Microball arrays.

doi: 10.1103/PhysRevLett.96.092501
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2005RA16      Phys.Rev. C 71, 064304 (2005)

S.Radionov, S.Aberg

Nuclear friction and quantum mechanical diffusion

doi: 10.1103/PhysRevC.71.064304
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2004AB18      Phys.Lett. B 598, 42 (2004)

S.Aberg, A.Heine, G.E.Mitchell, A.Richter

Isospin symmetry breaking in 93Tc and statistical properties

NUCLEAR STRUCTURE 93Tc; analyzed proton resonance energy, widths, isospin mixing effects. Random matrix theory.

doi: 10.1016/j.physletb.2004.07.051
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2004RA09      Eur.Phys.J. A 20, 35 (2004)

I.Ragnarsson, C.Andreoiu, T.Dossing, C.Fahlander, D.Rudolph, S.Aberg

Complete spectroscopy in high-spin cranking calculations

NUCLEAR STRUCTURE 59Cu; calculated levels, J, π, rotational and superdeformed bands configurations. Cranked Nilsson-Strutinsky formalism.

doi: 10.1140/epja/i2002-10316-1
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2003AN35      Phys.Rev.Lett. 91, 232502 (2003)

C.Andreoiu, T.Dossing, C.Fahlander, I.Ragnarsson, D.Rudolph, S.Aberg, R.A.E.Austin, M.P.Carpenter, R.M.Clark, R.V.F.Janssens, T.L.Khoo, F.G.Kondev, T.Lauritsen, T.Rodinger, D.G.Sarantites, D.Seweryniak, T.Steinhardt, C.E.Svensson, O.Thelen, J.C.Waddington

Doorway States in the Gamma Decay-Out of the Yrast Superdeformed Band in 59Cu

NUCLEAR REACTIONS 40Ca(28Si, p2α), E=122 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin. 59Cu deduced superdeformed band levels J, π, decay-out transitions, doorway states features. Configuration-dependent cranked Nilsson-Strutinsky model calculations.

doi: 10.1103/PhysRevLett.91.232502
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2001JU02      Nucl.Phys. A683, 207 (2001)

A.Juodagalvis, S.Aberg

Rotational Structure of T = 0 and T = 1 Bands in the N = Z Nucleus 62Ga

NUCLEAR STRUCTURE 62Ga; calculated rotational bands features, band termination, quadrupole moments, pairing energy. Spherical shell model, cranked Nilsson-Strutinsky model. Comparison with data.

doi: 10.1016/S0375-9474(00)00441-3
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2001SV01      Nucl.Phys. A682, 1c (2001)

C.E.Svensson, A.O.Macchiavelli, A.Juodagalvis, A.Poves, I.Ragnarsson, S.Aberg, D.E.Appelbe, R.A.E.Austin, C.Baktash, G.C.Ball, M.P.Carpenter, E.Caurier, R.M.Clark, M.Cromaz, M.A.Deleplanque, R.M.Diamond, P.Fallon, M.Furlotti, A.Galindo-Uribarri, R.V.F.Janssens, G.J.Lane, I.Y.Lee, M.Lipoglavsek, F.Nowacki, S.D.Paul, D.C.Radford, D.G.Sarantites, D.Seweryniak, F.S.Stephens, V.Tomov, K.Vetter, D.Ward, C.H.Yu

Collective Rotational Motion in the N = Z Nucleus 36Ar

NUCLEAR REACTIONS 24Mg(20Ne, 2α), E=80 MeV; measured Eγ, Iγ, (charged particle)γ-, γγ-coin, DSA. 36Ar deduced high-spin levels, J, π, T1/2, superdeformed band. Gammasphere, Microball arrays. Shell model and cranked mean-field calculations.

doi: 10.1016/S0375-9474(00)00615-1
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2001SV02      Phys.Rev. C63, 061301 (2001)

C.E.Svensson, A.O.Macchiavelli, A.Juodagalvis, A.Poves, I.Ragnarsson, S.Aberg, D.E.Appelbe, R.A.E.Austin, G.C.Ball, M.P.Carpenter, E.Caurier, R.M.Clark, M.Cromaz, M.A.Deleplanque, R.M.Diamond, P.Fallon, R.V.F.Janssens, G.J.Lane, I.Y.Lee, F.Nowacki, D.G.Sarantites, F.S.Stephens, K.Vetter, D.Ward

Lifetimes of Superdeformed Rotational States in 36Ar

NUCLEAR REACTIONS 24Mg(20Ne, 2α), E=80 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin, DSA. 36Ar deduced high-spin levels, superdeformed band J, π, T1/2, B(E2), quadrupole deformation. Gammasphere, Microball arrays. Comparison with cranked mean-field and large-scale shell model calculations.

doi: 10.1103/PhysRevC.63.061301
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2001SV03      Acta Phys.Pol. B32, 2413 (2001)

C.E.Svensson, A.O.Macchiavelli, A.Juodagalvis, A.Poves, I.Ragnarsson, S.Aberg, D.E.Appelbe, R.A.E.Austin, C.Baktash, G.C.Ball, M.P.Carpenter, E.Caurier, R.M.Clark, M.Cromaz, M.A.Deleplanque, R.M.Diamond, P.Fallon, M.Furlotti, A.Galindo-Uribarri, R.V.F.Janssens, G.J.Lane, I.Y.Lee, M.Lipoglavsek, F.Nowacki, S.D.Paul, D.C.Radford, D.G.Sarantites, D.Seweryniak, F.S.Stephens, V.Tomov, K.Vetter, D.Ward, C.H.Yu

Fast Rotation of the N = Z Nucleus 36Ar

NUCLEAR REACTIONS 24Mg(20Ne, 2α), E=80 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin, DSA. 36Ar deduced high-spin levels, J, π, configurations, deformation, band termination. Gammasphere, Microball arrays. Cranked mean-field calculations.


2000JU03      Phys.Lett. 477B, 66 (2000)

A.Juodagalvis, I.Ragnarsson, S.Aberg

Triaxiality in 48Cr

NUCLEAR STRUCTURE 48Cr; calculated rotational band level energies, J, B(E2), potential energy surfaces; deduced triaxial deformation. Cranked Nilsson-Strutinsky model.

doi: 10.1016/S0370-2693(00)00214-8
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2000SV02      Phys.Rev.Lett. 85, 2693 (2000)

C.E.Svensson, A.O.Macchiavelli, A.Juodagalvis, A.Poves, I.Ragnarsson, S.Aberg, D.E.Appelbe, R.A.E.Austin, C.Baktash, G.C.Ball, M.P.Carpenter, E.Caurier, R.M.Clark, M.Cromaz, M.A.Deleplanque, R.M.Diamond, P.Fallon, M.Furlotti, A.Galindo-Uribarri, R.V.F.Janssens, G.J.Lane, I.Y.Lee, M.Lipoglavsek, F.Nowacki, S.D.Paul, D.C.Radford, D.G.Sarantites, D.Seweryniak, F.S.Stephens, V.Tomov, K.Vetter, D.Ward, C.H.Yu

Superdeformation in the N = Z Nucleus 36Ar: Experimental, deformed mean field, and spherical shell model descriptions

NUCLEAR REACTIONS 24Mg(20Ne, 2α), E=80 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin. 36Ar deduced high-spin levels, J, π, superdeformed band, configurations. Gammasphere, Microball arrays. Cranked mean-field calculations, shell model calculations.

doi: 10.1103/PhysRevLett.85.2693
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1999AB03      Phys.Rev.Lett. 82, 299 (1999)

S.Aberg

Chaos Assisted Tunneling from Superdeformed States

NUCLEAR STRUCTURE 152Dy; calculated tunneling probability from superdeformed states vs angular momentum; deduced role of normal-deformed states chaotic properties.

doi: 10.1103/PhysRevLett.82.299
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1999AB21      Nucl.Phys. A649, 392c (1999)

S.Aberg

Decay-Out from SD States Initiated by the Onset of Chaos

doi: 10.1016/S0375-9474(99)00089-5
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1998JU04      Phys.Lett. 428B, 227 (1998)

A.Juodagalvis, S.Aberg

Band Termination in the Shell Model

NUCLEAR STRUCTURE 20Ne, 46Ti, 48Cr; calculated rotational bands levels, configurations, termination features. Shell model, seniority-coupling scheme.

doi: 10.1016/S0370-2693(98)00431-6
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1998KA02      Phys.Lett. 416B, 16 (1998)

L.B.Karlsson, I.Ragnarsson, S.Aberg

Identical Bands in Superdeformed Nuclei

NUCLEAR STRUCTURE 152Dy; calculated superdeformed bands configurations, moments of inertia, quadrupole moments; deduced identical bands high-N orbitals role. Cranked Nilsson-Strutinsky calculations.

doi: 10.1016/S0370-2693(97)01324-5
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1998KA41      Nucl.Phys. A639, 654 (1998)

L.B.Karlsson, I.Ragnarsson, S.Aberg

Polarization Effects in Superdeformed Nuclei

NUCLEAR STRUCTURE 142Sm, 143Eu, 144,148,149,150Gd, 151Tb, 148,150,151,152Dy; calculated superdeformed bands quadrupole moments; deduced single-particle polarization effects. Nilsson-Strutinsky calculations. Comparison with data.

doi: 10.1016/S0375-9474(98)00436-9
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1997AB27      Phys.Rev. C56, 1762 (1997); Erratum Phys.Rev. C58, 3011 (1998)

S.Aberg, P.B.Semmes, W.Nazarewicz

Spherical Proton Emitters

NUCLEAR STRUCTURE 105Sb, 109I, 112,113Cs, 146,147Tm, 150,151Lu, 156,157Ta, 160,161Re, 165,166,167Ir, 171Au, 185Bi; calculated proton emission T1/2, spectroscopic factors; deduced sensitivity to model parameters. 7B; calculated proton emission T1/2 vs Q(p), diffuseness. Several models considered, comparison with experiment.

doi: 10.1103/PhysRevC.56.1762
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1997AB28      Z.Phys. A358, 269 (1997)

S.Aberg, L.-O.Jonsson, L.B.Karlsson, I.Ragnarsson

Aspects on Superdeformed Nuclei

NUCLEAR STRUCTURE 152Dy; calculated superdeformed configurations Eγ distribution function, moment of inertia fractional change, single-particle, electrical quadrupole moments; deduced identical bands related features. 166Yb; calculated Eγ distribution function, normal deformal configurations. 146Gd; calculated hyperdeformed rotational band spreading, separation vs excitation energy. 180Hg; calculated potential energy surfaces, deformation related features; deduced hyperdeformation features. 148,149Gd calculated superdeformed configurations electrical quadrupole moments relative to 152Dy core. Effective single particle operators, full cranked Nilsson-Strutinsky approaches.

doi: 10.1007/s002180050326
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1997JO21      Nucl.Phys. A627, 53 (1997)

L.-O.Jonsson, S.Aberg

' Hyperdeformed ' Nuclei in the Light Hg Region

NUCLEAR STRUCTURE 180,182,190Hg; calculated potential energy surfaces. 180,182Hg; calculated rotational bands configurations, total energy vs spin, deformation; deduced hyperdeformed shapes. Cranked shell model, Woods-Saxon potential.

doi: 10.1016/S0375-9474(97)00475-2
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1997MA36      Nucl.Phys. A620, 296 (1997)

M.Matsuo, T.Dossing, E.Vigezzi, S.Aberg

Level Statistics of Near-Yrast States in Rapidly Rotating Nuclei

NUCLEAR STRUCTURE 160,161,162,163,164,165Dy, 162,163,164,165,166,167Er, 166,167,168,169,170,171,172,173Yb, 161,162,163,164,165,166Ho, 163,164,165,166,167,168Tm, 167,168,169,170,171,172,173,174Lu; analyzed high-spin level data; deduced nearest neighbor level spacing distribution related features. Cranked shell model.

doi: 10.1016/S0375-9474(97)00170-X
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1997MI05      Nucl.Phys. A614, 44 (1997)

M.Misu, W.Nazarewicz, S.Aberg

Deformed Nuclear Halos

NUCLEAR STRUCTURE Z=10; N=10; calculated macroscopic energy vs β2, β4, β6. Deformed single-particle model.

doi: 10.1016/S0375-9474(96)00458-7
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1995JO12      Phys.Lett. 348B, 309 (1995)

L.-O.Jonsson, S.Aberg

Giant Dipole Resonance in Nuclei with Exotic Shape

NUCLEAR STRUCTURE 96Zr; calculated GDR strength function for this nucleus and for separated 48Ca fragments; deduced necking degree of freedom role. Woods-Saxon potential, exotic nuclear shapes, RPA for phonon states.

doi: 10.1016/0370-2693(95)00167-J
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1995SE05      Phys.Lett. 345B, 185 (1995)

P.B.Semmes, I.Ragnarsson, S.Aberg

Magnetic Dipole Transitions in Superdeformed Nuclei

NUCLEAR STRUCTURE 194Hg, 194Tl; calculated superdeformed, rotational bands B(λ). Particle plus rotor model.

doi: 10.1016/0370-2693(94)01656-W
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1994AB17      Z.Phys. A349, 205 (1994)

S.Aberg, L.-O.Jonsson

Clustering Aspects of Nuclei with Octupole and Superdeformation

NUCLEAR STRUCTURE A=4-149; N=20-140; compiled, reviewed clustering aspects; deduced superdeformation, di-molecules, hyperdeformation related features.


1994BE15      Phys.Rev.Lett. 72, 3288 (1994)

R.Bengtsson, S.Aberg

Comment on ' The Proton h11/2 Intruder Orbital: Evidence for collectivity and a strong proton-neutron interaction '

doi: 10.1103/PhysRevLett.72.3288
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1994FA13      Phys.Rev.Lett. 73, 782 (1994)

P.Fallon, C.W.Beausang, S.Clarke, P.J.Twin, F.A.Beck, Th.Byrski, D.Curien, P.J.Dagnall, G.de France, G.Duchene, P.D.Forsyth, B.Haas, M.J.Joyce, A.O.Macchiavelli, E.S.Paul, J.F.Sharpey-Schafer, J.Simpson, J.P.Vivien, S.Aberg, W.Nazarewicz

Pair Excitaions and a Proton Band Crossing in Superdeformed 150Gd

NUCLEAR REACTIONS 130Te(26Mg, 6n), E=149 MeV; measured γγ-coin. 150Gd deduced superdeformed high-spin band, configuration, dynamic moments of inertia, relative Iγ.

doi: 10.1103/PhysRevLett.73.782
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1993AB08      Nucl.Phys. A557, 17c (1993)

S.Aberg

Superdeformed Nuclei

NUCLEAR STRUCTURE 146,150Gd, 151Tb, 152Dy, 188,190,191,192,193,194Hg; compiled, reviewed superdeformed band related data. 146Gd deduced hyperdeformation evidence. Other nuclei included.

doi: 10.1016/0375-9474(93)90528-6
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1993FL07      Phys.Rev.Lett. 71, 4299 (1993)

S.Flibotte, H.R.Andrews, G.C.Ball, C.W.Beausang, F.A.Beck, G.Belier, T.Byrski, D.Curien, P.J.Dagnall, G.de France, D.Disdier, G.Duchene, Ch.Finck, B.Haas, G.Hackman, D.S.Haslip, V.P.Janzen, B.Kharraja, J.C.Lisle, J.C.Merdinger, S.M.Mullins, W.Nazarewicz, D.C.Radford, V.Rauch, H.Savajols, J.Styczen, Ch.Theisen, P.J.Twin, J.P.Vivien, J.C.Waddington, D.Ward, K.Zuber, S.Aberg

ΔI = 4 Bifurcation in a Superdeformed Band: Evidence for a C4 symmetry

NUCLEAR REACTIONS 124Sn(30Si, 5n), E=158 MeV; measured Eγ, Iγ, γγ-coin. 149Gd deduced yrast superdeformed band moment of inertia, evidence for fourfold rotational symmetry.

doi: 10.1103/PhysRevLett.71.4299
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1992NA12      Phys.Lett. 289B, 238 (1992)

R.Nazmitdinov, S.Aberg

Quadrupole Splitting of Octupole Vibrational States

NUCLEAR STRUCTURE A=150; calculated giant octupole, dipole, quadrupole resonance K-component splittings; deduced analytical RPA solutions at spherical, superdeformed, hyperdeformed shells.

doi: 10.1016/0370-2693(92)91212-R
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1992SE01      Phys.Rev.Lett. 68, 460 (1992)

P.B.Semmes, I.Ragnarsson, S.Aberg

' Invisible ' Decay of Superdeformed States

NUCLEAR STRUCTURE 193,194Hg; calculated transition Iγ in superdeformed bands. 193Hg deduced internal conversion dominated M1 cross talk evidence.

doi: 10.1103/PhysRevLett.68.460
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1992VI03      Phys.Lett. 278B, 407 (1992)

J.P.Vivien, D.Balouka, B.Haas, H.R.Andrews, D.C.Radford, D.Ward, V.P.Janzen, D.Prevost, J.C.Waddington, S.Flibotte, S.Pilotte, P.Taras, A.Galindo-Uribarri, H.Kluge, S.Aberg

Radiation Originating from Unresolved Superdeformed States in 149Gd

NUCLEAR REACTIONS 124Sn(30Si, xn), E=155 MeV; measured correlated γγ-coincidence matrix, Iγ. 149Gd deduced unresolved superdeformed states.

doi: 10.1016/0370-2693(92)90576-P
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1990AB03      Phys.Rev.Lett. 64, 3119 (1990)

S.Aberg

Onset of Chaos in Rapidly Rotating Nuclei

NUCLEAR STRUCTURE 168Yb; calculated rotational frequency vs excitation. 152Dy; calculated level separation, other model parameters. Chaos in rapidly rotating nuclei.

doi: 10.1103/PhysRevLett.64.3119
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1990AB08      Nucl.Phys. A520, 35c (1990)

S.Aberg

Superdeformations - A Theoretical Overview

NUCLEAR STRUCTURE A=66-218; compiled superdeformed state calculations, data analyses.

doi: 10.1016/0375-9474(90)91132-B
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1990AB13      Ann.Rev.Nucl.Part.Sci. 40, 439 (1990)

S.Aberg, H.Flocard, W.Nazarewicz

Nuclear Shapes in Mean Field Theory

NUCLEAR STRUCTURE 188Os; 154Sm; 74,76,78,80,82,84Sr; 96,98,100Zr; compiled, evaluated energy surfaces. 182,184,186W; compiled, reviewed shape variables related features. 158,160,162,164,166,168Yb; compiled, evaluated data. 212Rn; compiled, evaluated spectra. 151,152,153Dy, 150,151Tb, 146,148,149,150Gd; compiled, evaluated superdeformed bands data. 180,182,184,186,188,190,192,194Hg; analyzed prolate-oblate energy difference. 186,188,190,192,194,196,198,200,202,204,206Pb; analyzed level data. Other aspects, nuclei discussed.

doi: 10.1146/annurev.ns.40.120190.002255
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1990HA31      Phys.Rev. C42, R1817 (1990)

B.Haas, D.Ward, H.R.Andrews, G.C.Ball, T.E.Drake, S.Flibotte, A.Galindo-Uribarri, V.P.Janzen, J.K.Johansson, H.Kluge, J.Kuehner, A.Omar, S.Pilotte, D.Prevost, J.Rodriguez, D.C.Radford, P.Taras, J.P.Vivien, J.C.Waddington, S.Aberg

Observation of Excited Proton and Neutron Configurations in the Superdeformed 149Gd Nucleus

NUCLEAR REACTIONS 124Sn(30Si, 5n), E=155 MeV; 124Sn(31P, 5n), E=156 MeV; measured γ-spectra, γγ-coin. 149Gd deduced levels, J, π, superdeformed band structure.

doi: 10.1103/PhysRevC.42.R1817
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1990HE14      Phys.Lett. 240B, 311 (1990)

G.Hebbinghaus, K.Strahle, T.Rzaca-Urban, D.Balabanski, W.Gast, R.M.Lieder, H.Schnare, W.Urban, H.Wolters, E.Ott, J.Theuerkauf, K.O.Zell, J.Eberth, P.von Brentano, D.Alber, K.H.Maier, W.Schmitz, E.M.Beck, H.Hubel, T.Bengtsson, I.Ragnarsson, S.Aberg

Superdeformed Band in 146Gd. First Observation of Band Crossing

NUCLEAR REACTIONS 110Pd(40Ar, 4n), E=180 MeV; measured γ-multiplicity, sum spectra, DSA. 146Gd deduced levels, J, π, T1/2, superdeformed band structure.

doi: 10.1016/0370-2693(90)91104-J
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1990HO13      Z.Phys. A336, 363 (1990)

J.Holler, S.Aberg

Octupole Instability of Super- and Hyperdeformed Nuclei

NUCLEAR STRUCTURE 152Dy, 190,194Hg, 200Rn; calculated potential energy surfaces; deduced possible superdeformation, hyperdeformation. 146Gd, 152Dy, 194,190Hg, 196Pb, 198Po, 200Rn; calculated octupole softness; deduced possible superdeformation. Cranked Nilsson-Strutinsky model.


1989JO04      Phys.Rev.Lett. 63, 2200 (1989)

J.K.Johansson, H.R.Andrews, T.Bengtsson, A.Djaafri, T.E.Drake, S.Flibotte, A.Galindo-Uribarri, D.Horn, V.P.Janzen, J.A.Kuehner, S.Monaro, N.Nadon, S.Pilotte, D.Prevost, D.C.Radford, I.Ragnarsson, P.Taras, A.Tehami, J.C.Waddington, D.Ward, S.Aberg

Multiple Superdeformed Bands in 153Dy

NUCLEAR REACTIONS 124Sn(34S, 5n), E not given; measured γγγ-coin, sum spectra. 153Dy deduced levels, J, π, moment of inertia, band structure, deformation, superdeformation features.

doi: 10.1103/PhysRevLett.63.2200
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1988AB09      Nucl.Phys. A488, 147c (1988)

S.Aberg

Nuclear Structure at High Spins - The Role of Shape Symmetries

NUCLEAR STRUCTURE 158Er, 150,149,148,146Gd, 152Dy, 220,221,222,223,224,226,228,230Th; analyzed data; deduced shell spectroscopic consequences.

doi: 10.1016/0375-9474(88)90259-X
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1988BE22      Phys.Lett. 208B, 39 (1988)

T.Bengtsson, I.Ragnarsson, S.Aberg

The Role of High-N Orbits in Superdeformed States

NUCLEAR STRUCTURE 152Dy, 149Gd, 148Eu, 146Sm; calculated superdeformed quadrupole moment, moment of inertia vs spin.

doi: 10.1016/0370-2693(88)91199-9
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1988SH30      J.Phys.(London) G14, 1201 (1988)

R.K.Sheline, I.Ragnarsson, S.Aberg, A.Watt

Interpretation of the Spectroscopy of 24Mg; A comparison of the shell model and the Nilsson-Strutinsky model

NUCLEAR STRUCTURE 24Mg; calculated levels, potential energy surfaces, B(E2). Shell, Nilsson-Strutinsky models comparison.

doi: 10.1088/0305-4616/14/9/008
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1987AB10      Nucl.Phys. A473, 1 (1987)

S.Aberg

Giant Monopole and Quadrupole Resonances in Rotating Nuclei

NUCLEAR STRUCTURE A=160; calculated isoscalar, isovector quadrupole, monopole vibrational levels. RPA.

doi: 10.1016/0375-9474(87)90152-7
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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 226,230,232,236Th, 228Rn, 236Pu; calculated potential energy surfaces vs deformation. Macroscopic-microscopic method.

doi: 10.1016/0375-9474(87)90156-4
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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. 154,156,158,160,162,164Dy deduced correlation between Δ(n), Δ(p), g.

doi: 10.1016/0370-2693(86)90251-0
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1986HA47      Phys.Scr. 34, 697 (1986)

I.Hamamoto, S.Aberg

Structure of Low-Lying K(π) = 1+ Mode in a Microscopic Model

NUCLEAR STRUCTURE 156Gd; calculated B(M1), transition densities. Woods-Saxon potential.

NUCLEAR REACTIONS 156Gd(e, e'), E ≤ 80 MeV; calculated σ(E, θ). DWBA.

doi: 10.1088/0031-8949/34/6A/026
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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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1985AB04      Phys.Scr. 31, 233 (1985)

S.Aberg

Competition between Pairing and Quadrupole Deformation in the Yrast Sequence of 150,152Dy

NUCLEAR STRUCTURE 150,152Dy; calculated levels, equilibrium deformations; deduced pairing, spin interdependence role. Blocked BCS model, Nilsson-Strutinsky basis.


1985AB09      Nucl.Phys. A443, 91 (1985)

S.Aberg, T.Dossing, K.Neergard

Theoretical Calculations of γ-Ray Feeding Patterns for Gd, Dy and Er Nuclei

NUCLEAR STRUCTURE 146,147,148,149,150Gd, 148,149,150,151,152Dy, 150,152,153,154Er; calculated levels, γ-spectra side feeding patterns, stretched dipole continuum spectra. Deformed oblate potential, many quasiparticle configurations, Monte Carlo calculations.

doi: 10.1016/0375-9474(85)90323-9
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1985PE01      Phys.Rev.Lett. 54, 306 (1985)

J.Pedersen, B.B.Back, S.Bjornholm, J.Borggreen, M.Diebel, G.Sletten, F.Azgui, H.Emling, H.Grein, G.Seiler-Clark, W.Spreng, H.J.Wollersheim, P.Walker, S.Aberg

Population of Triaxial Rotor Levels in 182Os

NUCLEAR REACTIONS 48Ca, 48,50Ti(136Xe, X), E=4.3-4.8 MeV/nucleon; measured Eγ, Iγ. 182Os deduced isomer, J, T1/2, decay characteristics, K selection rule violation, yrast configuration triaxiality.

doi: 10.1103/PhysRevLett.54.306
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1984HA40      Phys.Lett. 145B, 163 (1984)

I.Hamamoto, S.Aberg

Microscopic Description of a Low-Lying K(π) = 1+ Mode in 156Gd

NUCLEAR REACTIONS 156Gd(e, e), (e, e'), E not given; calculated M1 form factors; deduced proton excitation convection current role. Microscopic model.

NUCLEAR STRUCTURE 156Gd; calculated levels, B(M1); deduced proton excitation convection current role. Microscopic model.

doi: 10.1016/0370-2693(84)90329-0
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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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1982AB01      Phys.Scr. 25, 23 (1982)

S.Aberg

High-Spin Potential-Energy Surfaces

NUCLEAR STRUCTURE A=66-218; calculated high-spin potential energy surfaces. Cranked Nilsson-Strutinsky model.


1982AB05      Nucl.Phys. A391, 327 (1982)

S.Aberg, I.Ragnarsson, T.Bengtsson, R.K.Sheline

A Unified Approach to Particle-Holes and Rotations in the Spectrum of 16O

NUCLEAR STRUCTURE 16O; calculated level energies vs spin, potential energy surfaces; analyzed rotational bands. Cranked Nilsson-Strutinsky formalism.

doi: 10.1016/0375-9474(82)90613-3
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1982RA18      Phys.Lett. 114B, 387 (1982)

I.Ragnarsson, S.Aberg

Shape Coexistence and High-Spin States in 28Si

NUCLEAR STRUCTURE 28Si; calculated levels, potential energy surfaces, quadrupole moments. Cranked Nilsson-Strutinsky model.

doi: 10.1016/0370-2693(82)90077-6
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1982ZH03      Nucl.Phys. A390, 314 (1982)

J.-Y.Zhang, S.Aberg

A Microscopic Analysis of Moments of Inertia

NUCLEAR STRUCTURE 160,166Yb; calculated potential energy surfaces. 160,162,164,166,168,170,172,174,176Yb; calculated equilibrium deformation, moment of inertia vs spin. Microscopic model.

doi: 10.1016/0375-9474(82)90163-4
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1981BE41      Phys.Scr. 24, 200 (1981)

T.Bengtsson, M.E.Faber, G.Leander, P.Moller, M.Ploszajczak, I.Ragnarsson, S.Aberg

Some Properties of Superdeformed Nuclei

NUCLEAR STRUCTURE 152Dy; calculated potential, shell energy surfaces; 90,92Zr, 96Ru; calculated potential energy vs deformation; 96Ru; calculated liquid drop model energy. Anisotropic harmonic oscillator potential. A ≈ 100; deduced superdeformed properties. A ≈ 150; deduced superdeformed properties.

doi: 10.1088/0031-8949/24/1B/016
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1981RA06      Nucl.Phys. A361, 1 (1981)

I.Ragnarsson, S.Aberg, H.-B.Hakansson, R.K.Sheline

Application of the Cranked Nilsson Model in some Light Nuclei: The super backbend in 11B and 11C ( Question )

NUCLEAR STRUCTURE 8Be, 11,12C, 11B; calculated yrast levels, potential energy surfaces. 11C, 11B deduced super backbend. Cranked Nilsson model.

doi: 10.1016/0375-9474(81)90468-1
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