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NSR database version of May 24, 2024.

Search: Author = L.M.Robledo

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2024GI06      Phys.Rev. C 109, 044321 (2024)

S.A.Giuliani, L.M.Robledo

Odd nuclei and quasiparticle excitations within the Barcelona Catania Paris Madrid energy density functional

doi: 10.1103/PhysRevC.109.044321
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2024IL01      Phys.Lett. B 848, 138371 (2024)

A.Illana, R.M.Perez-Vidal, D.Stramaccioni, J.J.Valiente-Dobon, T.R.Rodriguez, L.M.Robledo, A.Poves, K.Auranen, O.Beliuskina, C.Delafosse, T.Eronen, Z.Ge, S.Geldhof, W.Gins, T.Grahn, P.T.Greenlees, H.Joukainen, R.Julin, H.Jutila, A.Kankainen, M.Leino, J.Louko, M.Luoma, D.Nesterenko, J.Ojala, J.Pakarinen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, J.Uusitalo, G.L.Zimba

Octupole correlations in the N = Z + 2 = 56 110Xe nucleus

NUCLEAR REACTIONS 54Fe(58Ni, 2n)110Xe, E=255 MeV; measured reaction products, Eγ, Iγ, Eα, Iα; deduced γ-ray energies and intensities, J, π, an octupole band . Comparison with systematics, theoretical calculations using the symmetry-conserving configuration-mixing method, based on a Gogny energy density functional. The Recoil-Decay Tagging (RDT) technique, the Mass Analysing Recoil Apparatus (MARA) vacuum mode-recoil separator, the K130 cyclotron at the Accelerator Laboratory of the University of Jyvaskylaa (JYFL), Finland.

doi: 10.1016/j.physletb.2023.138371
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2024KU07      Eur.Phys.J. A 60, (2024)

C.V.N.Kumar, L.M.Robledo, I.Vidana

Structure of single Λ-hypernuclei with Gogny-type Λ-nucleon forces

NUCLEAR STRUCTURE 16O, 28Si, 32S, 40Ca, 51V, 89Y, 139La, 208Pb; calculated binding energies of Λ single-particle states with the three ΛN Gogny-type forces, hypernuclei ground-state HFB and pairing energy, quadrupole moments.

doi: 10.1140/epja/s10050-024-01278-7
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2024RO04      J.Phys.(London) G51, 045108 (2024)

L.M.Robledo

High-K isomers in a self-consistent mean-field approach with the Gogny force

RADIOACTIVITY 254No, 178Hf, 178,182,186W, 270Ds(IT); calculated energy levels, J, π, two- and four-quasiparticle excitations leading to high-K isomeric states in several relevant examples across the nuclear chart, the Gogny force with the D1S and D1M parametrizations.

doi: 10.1088/1361-6471/ad2d60
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2023BA21      Eur.Phys.J. A 59, 156 (2023)

M.Baldo, L.M.Robledo, X.Vinas

The Barcelona Catania Paris Madrid energy density functional

RADIOACTIVITY 232,234,236,238U, 240Pu, 248Cm, 250Cf, 250,252,254,256Fm, 252,254,256No, 256,258,260Rf, 258,260,262Sg, 264Hs, 286Fl(SF); calculated T1/2. Comparison with available data.

doi: 10.1140/epja/s10050-023-01062-z
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2023GI12      Eur.Phys.J. A 59, 301 (2023)

S.A.Giuliani, L.M.Robledo

Cluster properties of heavy nuclei predicted with the Barcelona-Catania-Paris-Madrid energy density functional

RADIOACTIVITY 224Ra(14C), 238Pu(30Mg); calculated spatial mass distributions, fission paths, cluster decay paths, Cluster decay T1/2 employing the Barcelona-Catania-Paris-Madrid (BCPM) energy density functional (EDF).

doi: 10.1140/epja/s10050-023-01210-5
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2023KU16      Phys.Rev. C 108, 034312 (2023)

C.V.Nithish Kumar, L.M.Robledo

Hexadecapole axial collectivity in the rare earth region: A beyond-mean-field study

doi: 10.1103/PhysRevC.108.034312
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2023RO05      Phys.Rev. C 107, 044307 (2023)

R.Rodriguez-Guzman, L.M.Robledo, C.A.Jimenez-Hoyos, N.C.Hernandez

Least action description of dynamic pairing correlations in the fission of curium and californium isotopes based on the Gogny energy density functional

RADIOACTIVITY 240,242,246,248,250Cf, 240,242,246,248,250Cm(SF); calculated collective potentials, quadrupole moments, octupole moments, hexadecupole moments, proton and neutron pairing interaction energies, Hartree-Fock-Bogoliubov (HFB) plus rotational correction energies, inner and outer barrier heights of fission paths, and SF T1/2 with the generator coordinate method (GCM) and adiabatic time-dependent HFB (ATDHFB) scheme. Gogny energy density functional with D1M parametrization in the least action scheme. Role of dynamic pairing correlations investigated using the CESlater and CEE LA approximations.

doi: 10.1103/PhysRevC.107.044307
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2023RO09      Phys.Rev. C 108, 024301 (2023)

R.Rodriguez-Guzman, L.M.Robledo

Beyond-mean-field description of octupolarity in dysprosium isotopes with the Gogny-D1M energy density functional

NUCLEAR STRUCTURE 138,140,142,144,146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208Dy; calculated excitation energies of the first negative-parity states, B(E1), B(E3), collective wave functions, potential energy surface, positive and negative parity parity-projected potential energy surfaces, ground state quadrupole and octupole deformations. Hartree-Fock-Bogoliubov approximations based on D1M, D1S, and D1M* parametrizations of the Gogny-EDF. Comparison to experimental data.

doi: 10.1103/PhysRevC.108.024301
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2022BA29      Phys.Rev. C 106, 024313 (2022)

P.Bano, X.Vinas, T.R.Routray, M.Centelles, M.Anguiano, L.M.Robledo

Finite-range simple effective interaction including tensor terms

NUCLEAR STRUCTURE 68,70,72,74,76,78Ni; calculated ground-state energies, neutron and proton single-particle levels around the Fermi level. 58,59,60,61,62,63,64,65,66,67,68,69,70Ni; calculated rms charge radii, isotope shifts. 69,71,73,75,77,79Cu; calculated ground-state energies. 100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132Sn; calculated energy differences between 1h11/2 and 1g7/2 proton orbitals, single-particle neutron energies and their occupation probabilities. 132Sn, 134Te, 136Xe, 138Ba, 140Ce, 142Nd, 144Sm, 146Gd, 148Dy, 150Er; calculated energy differences between 1i13/2 and 1h9/2 neutron single-particle levels, and single-particle proton energies and their occupation probabilities in N=82 isotones. 91Zr, 93Mo, 95Ru, 97Pd, 99Cd, 101Sn; calculated neutron single-particle levels in N=51 isotones relative to the 2d5/2 level. Calculations based on simple effective interaction (SEI) with and without the addition of a short-range tensor force to SEI and SIII-T, SLy5-T, SAMi-T Skyrme and D1MTd Gogny effective interaction. Comparison with available experimental data.

doi: 10.1103/PhysRevC.106.024313
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2022NO10      Phys.Rev. C 106, 064304 (2022)

K.Nomura, L.Lotina, R.Rodriguez-Guzman, L.M.Robledo

Simultaneous description of β-decay and low-lying structure of neutron-rich even- and odd-mass Rh and Pd nuclei

NUCLEAR STRUCTURE 104,106,108,110,112,114,116,118,120,122,124Pd; calculated potential energy surfaces. 104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124Pd, 103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123Rh; calculated single-particle energies, quasiparticle energies, occupation probabilities, levels, J, π. 105,107,109Pd, 103,104,107,109Rh; calculated B(E2), B(M1). 106Rh; calculated magnetic dipole moment. Mapping framework based on the Gogny-EDF and the particle-boson coupling scheme. Constrained Hartree-Fock-Bogoliubov calculations using the Gogny-D1M energy density functional. Comparison to experimental data.

RADIOACTIVITY 104,105,106,107,108,109,110,112,113,114,116,117Rh(β-); calculated log ft, reduced matrix elements for GT transitions. Constrained Hartree-Fock-Bogoliubov calculations using the Gogny-D1M energy density functional. Comparison to experimental results.

doi: 10.1103/PhysRevC.106.064304
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2022RO01      J.Phys.(London) G49, 015101 (2022)

R.Rodriguez-Guzman, L.M.Robledo, K.Nomura, N.Cruz Hernandez

Quadrupole-octupole collectivity in the Xe, Ba, Ce and Nd isotopic chains described with mean field and beyond approaches

NUCLEAR STRUCTURE 110,112,114,116,118,120,122,124,126,128Ba, 134,136,138,140,142,144,146,148,150,152Ba; calculated collective wave functions, positive and negative parity-projected energies, quadrupole (octupole) deformation of the ground states, HFB energies, parity-projected potential energy surfaces (PPPESs) using mean field based methods.

doi: 10.1088/1361-6471/ac3472
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2022RO04      Phys.Rev. C 105, L021307 (2022)

L.M.Robledo

Formulation of the generator coordinate method with arbitrary bases

doi: 10.1103/PhysRevC.105.L021307
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2022RO08      Phys.Rev. C 105, 044317 (2022)

L.M.Robledo

Operator overlaps in harmonic oscillator bases with different oscillator lengths

NUCLEAR STRUCTURE 238Pu; calculated potential energy surface (including the rotational energy correction) as a function of the quadrupole moment. Investigated overlaps between the members of the set of wave functions entering the fission path of the 238Pu. Generator coordinate method calculations using a set of Hartree-Fock-Bogoliubov wave functions.

doi: 10.1103/PhysRevC.105.044317
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2022RO12      Phys.Rev. C 106, 024335 (2022)

R.Rodriguez-Guzman, L.M.Robledo

Role of dynamic pairing correlations in fission dynamics. II. Fermium and nobelium isotopes

NUCLEAR STRUCTURE 246,250,254,258,262Fm, 250,254,258,262No; calculated RVAP-PNP energies plus the zero point rotational energies as as functions of intrinsic quadrupole moment. 242,244,246,248,250,252,254,256,258,260,262Fm, 250,252,254,256,258,260,262,264No; calculated proton and neutron ground-state pairing interaction energies, inner and outer barrier heights, RVAP-PNP spontaneous fission half-lives. Hartree-Fock-Bogoliubov-based approximations and a restricted variation after particle number projection (RVAP-PNP), based on D1M* parametrization of the Gogny force.

doi: 10.1103/PhysRevC.106.024335
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2021ES09      Phys.Rev. C 104, 064314 (2021)

A.Esmaylzadeh, V.Karayonchev, K.Nomura, J.Jolie, M.Beckers, A.Blazhev, A.Dewald, C.Fransen, R.-B.Gerst, G.Hafner, A.Harter, L.Knafla, M.Ley, L.M.Robledo, R.Rodriguez-Guzman, M.Rudigier

Lifetime measurements to investigate γ softness and shape coexistence in 102Mo

NUCLEAR REACTIONS 100Mo(18O, 16O)102Mo, E=52 MeV; measured Eγ, Iγ, γγ-coin, T1/2 of levels by recoil-distance Doppler-shift method using an array of eleven HPGe detectors, and Cologne Plunger device at the Cologne FN Tandem accelerator facility. 102Mo; deduced levels, J, π, B(E2), B(M1), E0 transition probability; calculated deformation-energy surface in the (β, γ) plane. Comparison of levels and B(E2) with mapped interacting boson model (IBM) calculations, with microscopic input from Gogny mean-field. Systematics of 0+ and first 2+ states and B(E2) values in N=52-64, Sr, Zr, Mo and Ru isotopes. Discussed shape coexistence and γ-softness.

doi: 10.1103/PhysRevC.104.064314
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2021GO18      Phys.Rev. C 103, 064314 (2021)

C.Gonzalez-Boquera, M.Centelles, X.Vinas, L.M.Robledo

Finite-size instabilities in finite-range forces

NUCLEAR STRUCTURE 208Pb; calculated neutron and proton density with with a harmonic oscillator (HO) basis of 12, 14, 16, 18, and 19 shells using DIM DIM* Gogny interactions. 16O, 100,132,176Sn, 208Pb; calculated binding energies in Hartree-Fock from the HO-basis calculation, the coordinate-space quasilocal (QLA), and the full coordinate-space calculation (FINRES4) with D1M and D1M* Gogny interactions. 48Ca, 154Sm; calculated differences between the HFB energies as functions of number of harmonic oscillator (HO) shells and quadrupole deformation β2. Hartree-Fock (HF) method in the quasilocal approximation to finite-range forces. Role of the slope of the symmetry energy for nuclear structure properties.

doi: 10.1103/PhysRevC.103.064314
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2021HA45      Phys.Rev. C 104, 064602 (2021)

R.Han, M.Warda, A.Zdeb, L.M.Robledo

Scission configuration in self-consistent calculations with neck constraints

RADIOACTIVITY 258No(SF); calculated nuclear density distribution contours for different neck configurations and in scission regions, potential energy surface (PES) and neck contour in quadrupole-octupole (Q20, Q30) planes; deduced roles of constraint on the neck parameter and nuclear density distributions, scission configurations, potential energy surfaces, pre-scission line and configuration of the asymmetric fission mode in self-consistent mean-field calculations, including pairing, such as Hartree-Fock-Bogoliubov (HFB) approximation.

doi: 10.1103/PhysRevC.104.064602
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2021NO02      Phys.Rev. C 103, 044311 (2021)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo, J.E.Garcia-Ramos

Quadrupole-octupole coupling and the onset of octupole deformation in actinides

NUCLEAR STRUCTURE 224,226,228,230,232,234Pu, 228,230,232,234,236,238Cf; calculated self-consistent mean-field potential energy surfaces (SCMF-PESs) and sdf-IBM PESs in (β2, β3) plane. 218,220,222,224,226,228,230,232,234,236,238Ra, 220,222,224,226,228,230,232,234,236,238,240Th, 222,224,226,228,230,232,234,236,238,240,242U, 224,226,228,230,232,234,236,238,240,242,244Pu, 226,228,230,232,234,236,238,240,242,244,246Cm, 228,230,232,234,236,238,240,242,244,246,248Cf; calculated β2 and β3 corresponding to the ground-state minimum, deformation energies with respect to spherical configuration, octupole deformation energies, low-energy levels, J, π, B(E1), B(E2), effective quadrupole and octupole deformation parameters. 240Pu; calculated levels, J, π, bands. Hartree-Fock-Bogoliubov approximation, based on the Gogny-D1M energy density functional and corresponding mapped sdf-IBM. Comparison with experimental data taken from databases at Brookhaven National Laboratory.

doi: 10.1103/PhysRevC.103.044311
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2021NO11      Phys.Rev. C 104, 044324 (2021)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo, J.E.Garcia-Ramos, N.C.Hernandez

Evolution of octupole deformation and collectivity in neutron-rich lanthanides

NUCLEAR STRUCTURE 140,142,144,146,148Xe, 142,144,146,148,150Ba, 144,146,148,150,152Ce, 146,148,150,152,154Nd; calculated potential energy surfaces in (β2, β3) planes using self-consistent mean-field (SCMF) and interacting boson model (IBM), low-lying levels of positive- and negative-parity yrast states, strength parameters, level-energy and B(E2) ratios, quadrupole and octupole moments. 144,146Ba, 148,150Nd; calculated levels, J, p, bands, B(E1), B(E2), B(E3) using interacting boson model (IBM). Self-consistent mean-field (SCMF), and interacting boson model (IBM) approaches with Hartree-Fock-Bogoliubov (HFB) approximation and constrains on axially symmetric quadrupole and octupole operators using the Gogny-D1M interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.104.044324
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2021NO13      Phys.Rev. C 104, 054320 (2021)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo

Quadrupole-octupole coupling and the evolution of collectivity in neutron-deficient Xe, Ba, Ce, and Nd isotopes

NUCLEAR STRUCTURE 108,110,112,114,116,118Xe, 110,112,114,116,118,120Ba, 112,114,116,118,120,122Ce, 114,116,118,120,122,124Nd; calculated self-consistent mean-field (SCMF) and mapped-IBM potential-energy surfaces (PES) in (β2, β3) plane, low-energy yrast states, and states of quasi-β, and quasi-γ bands, B(E1), B(E2), B(E3), ratios E(excited states)/E(first 2+), effective quadrupole and octupole deformations; predicted octupole-deformed ground states for Ba and Ce isotopes near N=56. Mapped sdf-IBM framework, with microscopic input from quadrupole and octupole constrained Hartree-Fock-Bogoliubov (HFB) calculations, based on Gogny D1M energy density functional. Comparison with experimental data.

doi: 10.1103/PhysRevC.104.054320
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2021RO02      J.Phys.(London) G48, 015103 (2021)

R.Rodriguez-Guzman, Y.M.Humadi, L.M.Robledo

Microscopic description of quadrupole-octupole coupling in actinides with the Gogny-D1M energy density functional

NUCLEAR STRUCTURE 220,222,224,226,228,230,232,234,236,238,240U, 222,224,226,228,230,232,234,236,238,240,242Pu, 224,226,228,230,232,234,236,238,240,242,244Cm, 226,228,230,232,234,236,238,240,242,244,246Cf; calculated correlation energies, negative-parity excitation energies, reduced transition probabilities B(E1) and B(E3) using static Hartree-Fock-Bogoliubov approach, dynamical beyond-mean-field correlations via both parity restoration and symmetry-conserving generator coordinate method calculations based on the parametrization D1M of the Gogny energy density functional. Comparison with experimental data.

doi: 10.1088/1361-6471/abb000
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2021RO13      Phys.Rev. C 103, 044301 (2021)

R.RodrIguez-Guzman, L.M.Robledo

Microscopic description of quadrupole-octupole coupling in neutron-rich actinides and superheavy nuclei with the Gogny-D1M energy density functional

NUCLEAR STRUCTURE 288,290,292,294,296,298,300,302,304No; calculated mean-field potential energy surfaces (MFPESs), parity-projected potential energy surfaces (PPPESs) for negative and positive parities, and collective wave function contours for the ground states and the lowest negative-parity states in (Q20, Q30) planes with the Gogny-D1M energy density functional, single-particle energies for protons and neutrons as a function of quadrupole moment for reflection symmetric and asymmetric shapes. 278,280,282,284,286,288,290,292,294U, 280,282,284,286,288,290,292,294,296Pu, 282,284,286,288,290,292,294,296,298Cm, 284,286,288,290,292,294,296,298,300Cf, 286,288,290,292,294,296,298,300,302Fm, 288,290,292,294,296,298,300,302,304No, 290,292,294,296,298,300,302,304,306Rf, 292,294,296,298,300,302,304,306,308Sg, 294,296,298,300,302,304,306,308,310Hs, 296,298,300,302,304,306,308,310,312Ds; calculated mean-field ground-state quadrupole and octupole deformations, and the octupole correlation energies, correlation energies obtained within the 2D-GCM framework, 2D-GCM energy splittings, B(E1), B(E3). Hartree-Fock-Bogoliubov approach, with dynamical beyond-mean-field correlations via parity restoration and symmetry-conserving generator coordinate method calculations based on the Gogny-D1M energy density functional. Relevance to modeling the nuclear reactions for the r-process nucleosynthesis of superheavy nuclei (SHN).

doi: 10.1103/PhysRevC.103.044301
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2021RO19      Phys.Rev. C 104, L011302 (2021)

T.R.Routray, P.Bano, M.Anguiano, M.Centelles, X.Vinas, L.M.Robledo

Reexamination of the N=50 and Z=28 shell closure

NUCLEAR STRUCTURE 68,70,72,74,76,78Ni; calculated proton single-particle levels around the Fermi level. 69,71,73,75,77,79Cu; calculated energies and spins of the ground states, and energies of the first excited states. Quasilocal density functional theory (QLDFT) using Skyrme forces SAMi-T and SLy5 with the tensor part, D1M Gogny force, and simple effective interaction (SEI) model. Comparison with HFB calculations, and with experimental energies and spins of the first excited states.

doi: 10.1103/PhysRevC.104.L011302
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2021SH45      J.Phys.(London) G48, 123001 (2021)

j.A.Sheikh, J.Dobaczewski, P.Ring, L.M.Robledo, C.Yannouleas

Symmetry restoration in mean-field approaches

doi: 10.1088/1361-6471/ac288a
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2021TE04      Phys.Rev. C 103, 044321 (2021)

D.A.Testov, S.Bakes, J.J.Valiente-Dobon, A.Goasduff, S.Frauendorf, F.Nowacki, T.R.Rodriguez, G.de Angelis, D.Bazzacco, C.Boiano, A.Boso, B.Cederwall, M.Cicerchia, P.Colovic, G.Colucci, F.Didierjean, M.Doncel, J.A.Duenas, F.Galtarossa, A.Gozzelino, K.Hadynska-Klek, G.Jaworski, P.R.John, S.Lenzi, H.Liu, S.Lunardi, R.Menegazzo, D.Mengoni, A.Mentana, D.R.Napoli, G.Pasqualato, F.Recchia, S.Riccetto, L.M.Robledo, M.Rocchini, B.Saygi, M.Siciliano, Yu.Sobolev, S.Szilner

Octupole correlations near 110Te

NUCLEAR REACTIONS 58Ni(58Ni, 2pα)110Te, E=250 MeV; measured Eγ, Iγ, γγ-coin, half-lives of levels by recoil distance Doppler-shift (RDDS) method using a plunger device and differential decay curve method (DDCM), GALILEO Ge-detector array for γ detection and EUCLIDES Si-array for particle detection and reaction channel selection at the XTU-Tandem accelerator facility of National Legnaro Laboratories. 110Te; deduced levels, J, π, B(E2); calculated collective wave functions in (β2, β3) plane for the two lowest negative parity states. Comparison with theoretical calculations using tilted axis cranking approach and the symmetry configuration mixing method with the Gogny D1S interaction. Discussed systematics of configurations, and octupole admixtures for the known bands in 109Te, 110Te and 111I.

doi: 10.1103/PhysRevC.103.044321
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2021ZD01      Phys.Rev. C 104, 014610 (2021)

A.Zdeb, M.Warda, L.M.Robledo

Description of the multidimensional potential-energy surface in fission of 252Cf and 258No

RADIOACTIVITY 252Cf, 258No(SF); calculated potential energy surfaces (PES) in (Q20, Q30), (Q20, Q22) and (Q30, Q40)planes, density distributions, fission barriers, fission fragments and cross sections; deduced multiple solutions for given constraints and transitions between various overlapping potential-energy surfaces. Self-consistent Hartree-Fock-Bogoliubov approach with the D1S parametrization of the Gogny nucleon-nucleon interaction.

doi: 10.1103/PhysRevC.104.014610
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2020BE09      Phys.Rev. C 101, 044615 (2020)

R.N.Bernard, N.Pillet, L.M.Robledo, M.Anguiano

Description of the asymmetric to symmetric fission transition in the neutron-deficient thorium isotopes: Role of the tensor force

RADIOACTIVITY 216,222,226,230Th, 236U, 240Pu(SF); calculated energy differences for Hartree-Fock-Bogoliubov (HFB), mean field, and pairing energies for spherical, ground-state, first barrier and second well configurations. 216,222,226,230Th; calculated potential energy surfaces (PESs) in (Q20, Q30) and (Q20, Q40) planes, symmetric and asymmetric fission paths, fission valleys, energy differences for HFB, mean field, pairing energy, tensor energy, HFB with respect to the ground state, total tensor energy, proton and neutron pairing components as a function of Q40, total kinetic energy (TKE) and total excitation energy (TXE) at the exit point in the symmetric valley, mean neutron kinetic energy. 216,218,220,222,224,226,228,230,232Th, 236U, 240Pu; calculated barrier heights for symmetric and asymmetric paths. 106,107,108,109,110,111,112,113,114,115Rh; calculated S(n). Hartree-Fock-Bogoliubov (HFB) approach with D1ST2a Gogny plus tensor term. Comparison with results from standard D1S Gogny interaction, and with experimental data.

doi: 10.1103/PhysRevC.101.044615
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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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2020GI06      Phys.Rev. C 102, 045804 (2020)

S.A.Giuliani, G.Martinez-Pinedo, M.-R.Wu, L.M.Robledo

Fission and the r-process nucleosynthesis of translead nuclei in neutron star mergers

NUCLEAR STRUCTURE Z=85-120, N=120-250; calculated highest fission barriers, energy windows for β-delayed fission and neutron-induced fission. A=100-240; A=180-350; Z=30-100, N=65-230; calculated abundances as function of mass number and neutron numbers. A=254, Z=89-99; calculated neutron-induced fission and neutron capture stellar reaction rates at 0.64 GK. A=220-230; calculated abundances, radioactive energy emitted by β and α decays, and fission as a function of time for different ejecta conditions, ejecta heating rate as a function of time. Finite range droplet model with Thomas-Fermi (FRDM+TF), Skyrme HFB14, and Barcelona-Catania-Paris-Madrid (BCPM), energy density functional (EDF) methods.

doi: 10.1103/PhysRevC.102.045804
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2020NO01      Phys.Rev. C 101, 014306 (2020)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo

Structure of odd-odd Cs isotopes within the interacting boson-fermion-fermion model based on the Gogny-D1M energy density functional

NUCLEAR STRUCTURE 123,124Xe, 124,125,126,128,130,132Cs; calculated levels, J, π, band structures, electric quadrupole and magnetic dipole moments, B(E2), B(M1), B(M1)/B(E2), neutron and proton single-particle energies and occupation probabilities for odd-odd Cs isotopes. 124Xe; calculated Gogny-D1M and IBM-2 (β, γ) deformation energy surfaces up to 3 MeV from the global minimum. Interacting boson-fermion-fermion model based on the Gogny-D1M energy density functional framework. Comparison with experimental data from the databases at NNDC.

doi: 10.1103/PhysRevC.101.014306
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2020NO02      Phys.Rev. C 101, 024311 (2020)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo

β decay of odd-A nuclei with the interacting boson-fermion model based on the Gogny energy density functional

NUCLEAR STRUCTURE 124,126,128,130,132,134Xe, 126,128,130,132,134,136Ba; calculated low-lying levels of positive parity, J. 123,125,127,129,131,133Xe, 125,127,129,131,133,135Ba, 125,127,129,131,133,135Cs, 127,129,131,133,135,137La; calculated low-lying levels of positive parity, J, B(M1), B(E2), electric quadrupole and magnetic dipole moments, β-decay properties. 127Xe; calculated levels of positive parity, J using two IBFM models. Interacting boson-fermion model (IBFM), based on the Gogny-D1M nuclear energy density functional (EDF), with the constrained HartreeFock-Bogoliubov (HFB) approximation to compute potential energy surfaces. Comparison with experimental data taken from the ENSDF database at NNDC.

RADIOACTIVITY 125,127,129,131,133Cs, 127,129,131,133Ba, 129,131,133,135La(EC), (β+); calculated log ft values and compared with experimental values taken from the ENSDF database at NNDC. IBFM model calculations using input from realistic mean field calculations.

doi: 10.1103/PhysRevC.101.024311
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2020NO04      Phys.Rev. C 101, 044318 (2020)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo

β decay of even-A nuclei within the interacting boson model with input based on nuclear density functional theory

NUCLEAR STRUCTURE 124,126,128,130,132Xe, 124,126,128,130,132Ba, 124,126,128,130,132Cs; calculated levels, J, π using interacting boson model (IBM) with energy density functional (EDF). Comparison with experimental data from the ENSDF database.

RADIOACTIVITY 124,126,128Ba, 124,126,128,130,132Cs(β+), (EC); calculated logft for Gamow-Teller (GT) and Fermi (F) transition, and compared with experimental data from the ENSDF database. Energy density functional (EDF) based Interacting boson model (IBM) approach.

doi: 10.1103/PhysRevC.101.044318
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2020NO13      Phys.Rev. C 102, 064326 (2020)

K.Nomura, R.Rodriguez-Guzman, Y.M.Humadi, L.M.Robledo, J.E.Garcia-Ramos

Octupole correlations in light actinides from the interacting boson model based on the Gogny energy density functional

NUCLEAR STRUCTURE 218,220,222,224,226,228,230,232,234,236,238Ra, 220,222,224,226,228,230,232,234,236,238,240Th; calculated potential energy surfaces in (β2, β3) plane using self-consistent mean-field (SCMF), and interacting boson model (IBM), energies of yrast positive-parity and negative-parity states, and relative energy splitting between positive- and negative-parity yrast bands, B(E1), B(E2), B(E3), transition quadrupole and octupole moments. Hartree-Fock-Bogoliubov approximation, based on Gogny-D1M energy density functional, and sdf interacting boson model (IBM) Hamiltonian for quadrupole-octupole coupling and collective excitations in even-even actinides. Comparison with experimental data.

doi: 10.1103/PhysRevC.102.064326
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2020RO04      Eur.Phys.J. A 56, 43 (2020)

R.Rodriguez-Guzman, Y.M.Humadi, L.M.Robledo

Microscopic description of fission in superheavy nuclei with the parametrization D1M* of the Gogny energy density functional

doi: 10.1140/epja/s10050-020-00051-w
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2019BE12      Phys.Rev. C 99, 034603 (2019)

G.F.Bertsch, T.Kawano, L.M.Robledo

Angular momentum of fission fragments

NUCLEAR REACTIONS 235U(n, F)140Ba/140Te/140Xe/96Kr/96Zr/96Sr, E not given; calculated angular momentum of various fission fragments as a function of deformation β, angular distribution and anisotropy of dipole and quadrupole γ rays, anisotropy coefficients using usual spin-cutoff parametrization. discussed division of excitation energy in the newly formed fission fragments. Comparison with experimental values.

doi: 10.1103/PhysRevC.99.034603
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2019BE21      Phys.Rev. C 99, 064301 (2019)

R.Bernard, S.A.Giuliani, L.M.Robledo

Role of dynamic pairing correlations in fission dynamics

RADIOACTIVITY 236U, 240Pu, 252Cf(SF); calculated contour plots of Hartree-Fock-Bogoliubov (HFB) energies for different quadrupole moments, potential energies as function of quadrupole moment, particle-particle correlation energies, octupole and hexadecapole moments and neck parameters, spontaneous fission half-lives, fission barrier heights, and fission isomer excitation energies. Restricted variation after projection (RVAP) particle number projection (PNP) method with dynamic pairing correlations, Gogny D1M parametrization, and inertias from adiabatic time dependent Hartree-Fock-Bogoliubov (ATDHFB) theory and the Gaussian overlap approximation (GOA) to the generator coordinate method (GCM).

doi: 10.1103/PhysRevC.99.064301
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2019BE26      Phys.Rev. C 100, 024607 (2019)

G.F.Bertsch, W.Younes, L.M.Robledo

Diabatic paths through the scission point in nuclear fission

RADIOACTIVITY 236U(SF); calculated scission configurations, energy of Glider configuration with the D1S energy functional, neck parameter neck as a function of deformation for Glider, density distributions of the Glider configurations, overlaps of Glider configurations near the scission point, thermal energy associated with Glider at the scission point, characteristics of the GCM paths through the scission point, energy of the configuration with the D1S energy functional, Glider neck size with the BCPM energy functional, Hartree-Fock potential energy surfaces for 236U along the fission valley constrained by the quadrupole field, fraction of excitation energy in the heavy fragment and total final state excitation energy. Self-consistent mean-field theory with generator coordinate method (GCM) configurations through the scission point, constructed in the Hartree-Fock approximation with axially symmetric mean fields. Relevance to the scission-point statistical model to describe mass yields and excitation energies of fission fragments.

doi: 10.1103/PhysRevC.100.024607
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2019BE32      Phys.Rev. C 100, 044606 (2019)

G.F.Bertsch, L.M.Robledo

Decay widths at the scission point in nuclear fission

RADIOACTIVITY 236U(SF); calculated mass quadrupole moments and neck size of Glider configurations, energies of configurations used to build the continuum wave functions for GCM-constrained Glider configurations, Hartree-Fock energy as a function of the separation between centers of mass of the two nascent fragments, strength function for the Glider configuration, decay widths using generator coordinate method.

doi: 10.1103/PhysRevC.100.044606
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2019ES04      Phys.Rev. C 100, 064309 (2019)

A.Esmaylzadeh, J.-M.Regis, Y.H.Kim, U.Koster, J.Jolie, V.Karayonchev, L.Knafla, K.Nomura, L.M.Robledo, R.Rodriguez-Guzman

Lifetime measurements and shape coexistence in 97Sr

NUCLEAR REACTIONS 235U(n, F), E=thermal neutrons from high-flux reactor of ILL-Grenoble; measured fission products using Lohengrin spectrometer, Eγ, Iγ, level half-lives by (fragment)γγ(t) fast-timing technique using LaBr detectors for γ detection and ionization chamber for fission fragments. 97Sr; deduced levels, isomer, J, π, B(M1), B(E2). Comparison with previous experimental results, and with interacting boson-fermion model calculation based on microscopic energy density functional.

doi: 10.1103/PhysRevC.100.064309
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2019NO04      Phys.Rev. C 99, 034308 (2019)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo

Spectroscopy of odd-odd nuclei within the interacting boson-fermion-fermion model based on the Gogny energy-density functional

NUCLEAR STRUCTURE 195,196,197,198,199,200Hg, 194,195,196,197,198,199Au; calculated levels, J, π, potential energy surfaces for 196,198,200Hg, strength parameters for 195,197,199Hg, 194,196,198Au nuclei, neutron and proton single-particle energies and occupation probabilities for odd-A nuclides, and B(E2), B(M1), electric quadrupole and magnetic dipole moments for 194,196,198Au using interacting boson-fermion-fermion model (IBFFM) based on the Gogny D1M energy-density functional. Comparison with experimental values taken from databases at NNDC, BNL.

doi: 10.1103/PhysRevC.99.034308
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2019RO01      J.Phys.(London) G46, 013001 (2019)

L.M.Robledo, T.R.Rodriguez, R.R.Rodriguez-Guzman

Mean field and beyond description of nuclear structure with the Gogny force: a review

doi: 10.1088/1361-6471/aadebd
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2018BE11      Phys.Rev. C 97, 064619 (2018)

G.F.Bertsch, W.Younes, L.M.Robledo

Scission dynamics with K partitions

RADIOACTIVITY 236U(SF); calculated potential energy surfaces, density distributions, shape parameters, and K partitions of g.s. and states close to fission using configuration-interaction (CI) formalism and GCM-constrained HFB configurations; deduced major rearrangement of K occupancy factors at scission point of nuclear fission.

doi: 10.1103/PhysRevC.97.064619
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2018BU16      Phys.Rev. C 98, 064320 (2018)

B.Bucher, H.Mach, A.Aprahamian, L.M.Robledo, G.S.Simpson, J.Rissanen, D.G.Ghita, B.Olaizola, W.Kurcewicz, J.Aysto, T.Eronen, L.M.Fraile, A.Jokinen, P.Karvonen, I.D.Moore, H.Penttila, M.Reponen, E.Ruchowska, A.Saastamoinen, M.K.Smith, C.Weber

New insights into triaxiality and shape coexistence from odd-mass 109Rh

RADIOACTIVITY 109Ru(β-)[from U(p, F), E=30 MeV]; measured Eγ, Iγ, γγ-coin, level half-lives using fast timing βγγ(t) technique at the IGISOL facility of University of Jyvaskyla. 109Rh; deduced levels, J, π, B(M1), B(E2).

NUCLEAR STRUCTURE 109Rh; calculated potential energy surface (PES) in (β, γ) plane, proton single-particle energies as function of deformation parameters Q0 and γ, minimum energy E(β, γ) for the different blocked configurations using HFB method.

doi: 10.1103/PhysRevC.98.064320
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2018GI05      Phys.Rev. C 97, 034323 (2018)

S.A.Giuliani, G.Martinez-Pinedo, L.M.Robledo

Fission properties of superheavy nuclei for r-process calculations

NUCLEAR STRUCTURE 232Th, 262,290No, 316Ds; calculated collective fission properties as a function of quadrupole moment. Z=84-120, N=118-250; calculated S(2n), fission barrier heights, spontaneous fission half-lives as function of fissibility parameter, energy window for the neutron-induced fission, dominating decay channels of spontaneous fission, α-decay, neutron-capture, neutron-induced α emission, neutron-induced fission, and two-neutron emission for 3640 superheavy nuclides. Self-consistent mean-field calculations using the Barcelona-Catania-Paris-Madrid energy density functional. Comparison with available experimental data.

doi: 10.1103/PhysRevC.97.034323
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2018GO07      Phys.Lett. B 779, 195 (2018)

C.Gonzalez-Boquera, M.Centelles, X.Vinas, L.M.Robledo

New Gogny interaction suitable for astrophysical applications

NUCLEAR STRUCTURE N<180; calculated binding energy differences in even-even nuclei. Comparison with available data.

doi: 10.1016/j.physletb.2018.02.005
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2018NO06      Phys.Rev. C 97, 064313 (2018)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo

Description of neutron-rich odd-mass krypton isotopes within the interacting boson-fermion model based on the Gogny energy density functional

NUCLEAR STRUCTURE 86,88,90,92,94Kr; calculated deformation energy surfaces in (β, γ) plane, energies of first 2+ and 4+ states, B(E2) and spectroscopic quadrupole moments of the first 2+ states. 87,89,91,93,95Kr; calculated levels, J, π of low-lying states, B(E2), B(M1), spectroscopic quadrupole moments and magnetic dipole moments of the first 5/2+, 3/2+, and 1/2+ states. Interacting boson-fermion model (IBFM) calculations with Gogny-D1M energy density functional. Comparison with experimental data.

doi: 10.1103/PhysRevC.97.064313
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2018NO07      Phys.Rev. C 97, 064314 (2018)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo

Prolate-to-oblate shape phase transitions in neutron-rich odd-mass nuclei

NUCLEAR STRUCTURE 186,188,190,192,194Pt, 186,188,190,192,194Os; calculated deformation energy surfaces in (β, γ) plane, energies of first 4+ and 2+, and second 2+ states, spectroscopic quadrupole moments and B(E2) of first 2+ states. 185,187,189,191,193,195,197,199Pt, 185,187,189,191,193Os, 185,187,189,191,193,195Ir; calculated strength parameters, single particle energies, and occupation probabilities, levels, J, π of low-lying states, effective β and γ deformation parameters, B(E2), B(M1), spectroscopic quadrupole moments and magnetic dipole moments for 195Pt, 189Os, 191Ir. Constrained self-consistent mean-field calculations within the Hartree-Fock-Bogoliubov method using Gogny-D1M energy density functional (EDF) for even-even isotopes, and interacting boson-fermion model (IBFM) Hamiltonian with Gogny-D1M EDF for odd-A isotopes. Comparison with experimental data.

doi: 10.1103/PhysRevC.97.064314
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2018RO24      Phys.Rev. C 98, 034308 (2018)

R.Rodriguez-Guzman, L.M.Robledo

Least action description of spontaneous fission in fermium and nobelium nuclei based on the Gogny energy density functional

RADIOACTIVITY 242,244,246,248,250,252,254,256,258,260,262Fm, 250,252,254,256,258,260No(SF); calculated Hartree-Fock-Bogoliubov (HFB) plus rotational correction energies, inner barrier heights of fission paths, and SF half-lives within the generator coordinate method (GCM) and adiabatic time dependent HFB (ATDHFB) scheme. Gogny energy density functional with D1M parametrization in the least action scheme. Comparison with experimental data.

doi: 10.1103/PhysRevC.98.034308
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2018WA29      Phys.Rev. C 98, 041602 (2018)

M.Warda, A.Zdeb, L.M.Robledo

Cluster radioactivity in superheavy nuclei

NUCLEAR STRUCTURE 234U, 258No, 284Cn; calculated potential energy surfaces (PEC) in (Q2, Q3) plane, pre- and post-scission configurations. 224Ra, 228Th, 234U, 238Pu, 244Cm, 248Cf, 254Fm, 258No, 264Rf, 268Sg, 274Hs, 278Ds, 284Cn, 290Fl, 294Lv; calculated cluster radioactivity (CR) fission paths as function of Q2 and Q3, and half-lives using microscopic theory. Comparison with available experimental data. Relevance to cluster decay mode in superheavy nuclei (SHN).

doi: 10.1103/PhysRevC.98.041602
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2017BA03      Phys.Rev. C 95, 014318 (2017)

M.Baldo, L.M.Robledo, P.Schuck, X.Vinas

Barcelona-Catania-Paris-Madrid functional with a realistic effective mass

NUCLEAR STRUCTURE Z=8-108, N=8-156; calculated binding energy differences of theoretical values computed with the HFB method and experimental values from AME-2012 for 620 even-even nuclei, rms charge deviations between experimental and theoretical values for the 315 even-even nuclei. 234U, 240,244Pu, 242,246Cm; calculated first and second fission barrier heights and the excitation energy of the fission isomers from Barcelona-Catania-Paris-Madrid (BCPM* and BCPM) functionals, and compared to experimental data. 90Zr, 106,110,112,114,116Cd, 112,114,116,118,120,122,124Sn, 144Sm, 208Pb; calculated average excitation energy of the giant monopole resonance (GMR) and giant quadrupole resonance (GQR) including pairing correlations, and compared with experimental data. Proposed a variant of Barcelona-Catania-Paris-Madrid (BCPM) energy density functional, with bare mass replaced by a density dependent effective mass.

doi: 10.1103/PhysRevC.95.014318
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2017BE08      Acta Phys.Pol. B48, 249 (2017)

R.N.Bernard, L.M.Robledo, T.R.Rodriguez

Octupole Correlations in a Symmetry Conserving Framework

NUCLEAR STRUCTURE 144Ba; calculated potential surface vs deformation β2 and β3 parameters, mass excess, levels, J, π, potential surface vs deformation β2 and β3 parameters, mass excess for specified states J, π, transition strength matrix elements using microscopic framework involving angular momentum, parity and particle number projected intrinsic HFB states, Gogny D1S interaction; deduce strong octupole collectivity

doi: 10.5506/APhysPolB.48.249
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2017BR18      Phys.Rev.Lett. 119, 192504 (2017)

B.A.Brown, G.F.Bertsch, L.M.Robledo, M.V.Romalis, V.Zelevinsky

Nuclear Matrix Elements for Tests of Local Lorentz Invariance Violation

NUCLEAR STRUCTURE 21Ne, 23Na, 133Cs, 173Yb, 201Hg; calculated quadrupole matrix elements. Self-consistent mean-field model (SCMF).

doi: 10.1103/PhysRevLett.119.192504
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2017BU07      Phys.Rev.Lett. 118, 152504 (2017)

B.Bucher, S.Zhu, C.Y.Wu, R.V.F.Janssens, R.N.Bernard, L.M.Robledo, T.R.Rodriguez, D.Cline, A.B.Hayes, A.D.Ayangeakaa, M.Q.Buckner, C.M.Campbell, M.P.Carpenter, J.A.Clark, H.L.Crawford, H.M.David, C.Dickerson, J.Harker, C.R.Hoffman, B.P.Kay, F.G.Kondev, T.Lauritsen, A.O.Macchiavelli, R.C.Pardo, G.Savard, D.Seweryniak, R.Vondrasek

Direct Evidence for Octupole Deformation in 146Ba and the Origin of Large E1 Moment Variations in Reflection-Asymmetric Nuclei

NUCLEAR REACTIONS 208Pb(146Ba, 146Ba'), E=659 MeV; measured reaction products, Eγ, Iγ. 144,146,148Ba; deduced energy levels, J, π, B(Eλ), quadrupole and octupole deformation parameters. Calculated HFB potential energy surfaces, neutron single-particle energies. Coulomb excitation, comparison with available data.

doi: 10.1103/PhysRevLett.118.152504
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2017GI04      Acta Phys.Pol. B48, 299 (2017)

S.A.Giuliani, G.Martinez-Pinedo, L.M.Robledo, M.-R.Wu

r-process Calculations with a Microscopic Description of the Fission Process

NUCLEAR REACTIONS Z=84-120(n, f), E not given; calculated fission rates, r-process abundances using TALYS code with BCPM EDF (Barcelona-Catania-Paris-Madrid Energy Density functional) and using Panov rates, r-process abundances. Compared with Solar abundances.

RADIOACTIVITY Z=84-120(SF); calculated fission rates, r-process abundances using TALYS code with BCPM EDF (Barcelona-Catania-Paris-Madrid Energy Density functional) and using Panov rates, r-process abundances. Compared with Solar abundances.

doi: 10.5506/APhysPolB.48.299
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2017LE04      Phys.Rev. C 95, 064309 (2017)

S.R.Lesher, C.Casarella, A.Aprahamian, L.M.Robledo, B.P.Crider, R.Ikeyama, I.R.Marsh, M.T.McEllistrem, E.E.Peters, F.M.Prados-Estevez, M.K.Smith, Z.R.Tully, J.R.Vanhoy, S.W.Yates

Lifetime measurements of low-spin negative-parity levels in 160Gd

NUCLEAR REACTIONS 160Gd(n, n'γ), E=1.5-2.8 MeV; measured Eγ, Iγ, γ(θ), excitation functions, level half-lives by DSAM at the University of Kentucky Accelerator Laboratory (UKAL). 160Gd; deduced levels, J, π, bands, multipolarities, mixing ratios, B(E2), B(E1), octupole vibrations; calculated potential energy surface in (Q20, Q30) plane. Comparison with generator coordinate method (GCM) calculations using the GognyD1S energy density functional.

doi: 10.1103/PhysRevC.95.064309
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2017NO04      Phys.Rev. C 95, 064310 (2017)

K.Nomura, R.RodrIguez-Guzman, L.M.Robledo

Structural evolution in germanium and selenium nuclei within the mapped interacting boson model based on the Gogny energy density functional

NUCLEAR STRUCTURE 66,68,70,72,74,76,78,80,82,84,86,88,90,92,94Ge, 68,70,72,74,76,78,80,82,84,86,88,90,92,94,96Se; calculated mean-field potential energy surfaces in (β, γ) plane using the Gogny-D1M EDF, and the IBM, level energies and B(E2) of low-lying 0+, 2+ and 4+ states, fraction of intruder configuration in 0+ states, spectroscopic quadrupole moments of 2+ states, ρ2(E0). 70,72,74,92Ge, 72,74,76,94Se; calculated positive-parity levels, J. Shape/phase transitions and shape coexistence. Interacting boson model (IBM) with self-consistent mean-field calculation based on the Gogny-D1M energy density functional, with mean-field energy surface from constrained Hartree-Fock-Bogoliubov (HFB) method. Comparison with experimental data.

doi: 10.1103/PhysRevC.95.064310
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2017NO07      Phys.Rev. C 96, 014314 (2017)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo

Description of odd-mass nuclei within the interacting boson-fermion model based on the Gogny energy density functional

NUCLEAR STRUCTURE 149,151,153,155Eu, 149,151,153,155Sm, 195Pt, 195Au; calculated spherical single-particle energies, occupation probabilities of the single-particle orbitals, parameters of the boson-fermion Hamiltonian, coupling constants of the boson-fermion interaction, levels, J, π, B(E2), B(M1), electric quadrupole and magnetic dipole moments, bands and wavefunction amplitudes for levels in 195Pt and 195Au. 148,150,152,154Sm, 194Pt; calculated parameters of the boson Hamiltonian, potential energy surface contours in (β, γ) plane, low-lying levels, J, π, B(E2) for 194Pt. Interacting boson fermion model (IBFM) with parameters based on the Hartree-Fock-Bogoliubov (HFB) approximation, and with the Gogny-D1M energy density functional (EDF) at the mean-field level. Comparison with experimental data.

doi: 10.1103/PhysRevC.96.014314
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2017NO08      Phys.Rev. C 96, 034310 (2017)

K.Nomura, R.Rodriguez-Guzman, Y.M.Humadi, L.M.Robledo, H.Abusara

Structure of krypton isotopes within the interacting boson model derived from the Gogny energy density functional

NUCLEAR STRUCTURE 70,72,74,76,78,80,82,84,86,88,90,92,94,96,98,100Kr; calculated (β, γ)-deformation energy surfaces, mapped IBM energy surfaces, energies, B(E2) and ρ2(E0) for first and second 2+, first 4+ and second 0+ states using Gogny-D1M and relativistic DD-PC1 energy density functionals (EDFs). 74,76,96,98Kr; calculated positive-parity levels, J using Gogny-D1M EDF. 76,98Kr; calculated low-energy positive-parity levels, J using Gogny D1S, D1M, D1N, relativistic DD-ME2 and DD-PC1 EDFs. Discussed shape transition and shape coexistence phenomena. Interacting boson model (IBM), with Hamiltonian from mean-field calculations based on several parametrizations of the Gogny energy density functional and the relativistic mean-field Lagrangian. Comparison with available experimental data.

doi: 10.1103/PhysRevC.96.034310
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2017NO12      Phys.Rev. C 96, 064316 (2017)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo

Shape transitions in odd-mass γ-soft nuclei within the interacting boson-fermion model based on the Gogny energy density functional

NUCLEAR STRUCTURE 129,131,133,135,137Ba, 127,129,131,133,135,137Xe, 129,131,133,135,137La, 127,129,131,133,135Cs; calculated single-particle energies, strength parameter of boson-fermion interaction, low-lying levels, J, π, B(E2), B(M1), spectroscopic quadrupole moments, magnetic moments. 128,130,132,134,136Ba, 126,128,130,132,134Xe; calculated Gogny-D1M and mapped IBM energy surfaces in (β2, γ) plane, low-lying levels, J, π. Interacting boson-fermion model (IBFM), with parameters determined from the microscopic Hartree-Fock-Bogoliubov (HFB) approximation, based on the parametrization D1M of the Gogny energy density functional. Comparison with experimental data taken from the databases at NNDC.

doi: 10.1103/PhysRevC.96.064316
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2017RO28      Eur.Phys.J. A 53, 245 (2017)

R.Rodriguez-Guzman, L.M.Robledo

Microscopic description of fission in odd-mass uranium and plutonium nuclei with the Gogny energy density functional

NUCLEAR STRUCTURE 233,235,237,239,241,243,245,247,249U, 233,235,237,239,241,243,245,247,249Pu; calculated binding energy, rotational energy, Q, octupole, hexadecapole moment vs quadrupole moment, gs fission path starting from 233,243U and 233,243Pu, fission fragment mass and charge, fission T1/2 within HFB-EFA (HFB Equal Filling Approximation) using Gogny D1M EDF. Compared with ATD (Adiabatic Time-Dependent) and GCM. Complete results shown only for several nuclei.

doi: 10.1140/epja/i2017-12444-9
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2016BE06      J.Phys.(London) G43, 045115 (2016)

B.Behera, X.Vinas, T.R.Routray, L.M.Robledo, M.Centelles, S.P.Pattnaik

Deformation properties with a finite-range simple effective interaction

NUCLEAR STRUCTURE Z=8-108; calculated binding energies and charge radii of even-even nuclei, potential energy surfaces, fission barriers, deformation properties. Finite-range simple effective interaction within the Hartree-Fock-Bogoliubov mean-field approach. Comparison with experimental data.

doi: 10.1088/0954-3899/43/4/045115
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2016BE18      Phys.Rev. C 93, 061302 (2016)

R.N.Bernard, L.M.Robledo, T.R.Rodriguez

Octupole correlations in the 144Ba nucleus described with symmetry-conserving configuration-mixing calculations

NUCLEAR STRUCTURE 144Ba; calculated HFB potential energy surface (PES), particle number, parity, and angular momentum PES in (β2, β3) plane, levels, J, π, B(E1), B(E2), B(E3), collective wave functions for the ground state and first excited negative-parity bands. Symmetry-conserving configuration-mixing method (SCCM) based on a Gogny energy density functional (EDF). Comparison with experimental data.

doi: 10.1103/PhysRevC.93.061302
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2016NO11      Phys.Rev. C 94, 044314 (2016)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo

Structural evolution in A ∼ 100 nuclei within the mapped interacting boson model based on the Gogny energy density functional

NUCLEAR STRUCTURE 92,94,96,98,100,102,104,106,108Sr, 94,96,98,100,102,104,106,108,110Zr, 96,98,100,102,104,106,108,110,112Mo, 98,100,102,104,106,108,110,112,114Ru; calculated deformation-energy surface contours in (β, γ) plane within the constrained Hartree-Fock-Bogoliubov framework, low-lying yrast and non-yrast levels, J, π, amplitudes of first and second 0+ states, B(E2). Self-consistent mean-field approximation based on the Gogny-D1M energy density functional. Comparison with experimental data taken from NNDC databases.

doi: 10.1103/PhysRevC.94.044314
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2016OR06      Eur.Phys.J. A 52, 166 (2016)

J.N.Orce, M.Kumar Raju, N.A.Khumalo, T.S.Dinoko, P.Jones, R.A.Bark, E.A.Lawrie, S.N.T.Majola, L.M.Robledo, B.Rubio, M.Wiedeking, J.Easton, E.A.Khaleel, B.V.Kheswa, N.Kheswa, M.S.Herbert, J.J.Lawrie, P.L.Masiteng, M.R.Nchodu, J.Ndayishimye, D.Negi, S.P.Noncolela, S.S.Ntshangase, P.Papka, D.G.Roux, O.Shirinda, P.S.Sithole, S.W.Yates

Search for two-phonon octupole excitations in 146Gd

NUCLEAR REACTIONS 144Sm(α, 2n), E=26.1-26.8 MeV; measured Eγ, Iγ(θ), γγ-coin. 148Gd deduced γ-ray energy spectra gated by specified γ transitions, relative γ intensities in depopulating the 6+ (3484.5 keV) state, linear polarization, B(E3) for one-photon and two-photon excitations; calculated B(E3) using GCM with Gogny D1S force.

doi: 10.1140/epja/i2016-16166-2
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2016RO04      Eur.Phys.J. A 52, 12 (2016)

R.Rodriguez-Guzman, L.M.Robledo

Microscopic description of fission in neutron-rich radium isotopes with the Gogny energy density functional

NUCLEAR STRUCTURE 232,234,236,238,240,242,244,246,248,250,252,254,256,258,260,262,264Ra; calculated one-fragment and two-fragments HFB plus zero-point rotational energy, octupole, octupole, hexadecapole moment vs quadrupole moment, deformation, first fission isomer, first and second barrier heights vs neutron number, proton and neutron numbers of two fission fragments, spontaneous fission T1/2 using mean-field (HFB) based on different parameterizations of Gogny density functional.

doi: 10.1140/epja/i2016-16012-7
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2016RO22      Eur.Phys.J. A 52, 300 (2016)

L.M.Robledo

Enhancement of octupole strength in near spherical nuclei

NUCLEAR STRUCTURE 20Ne, 64Zn, 158Gd, 208Pb, 224Ra; calculated B(E3), gs quadrupole deformation. Compared with data. Fe, Ni, Zn, Cd, Sn, Te, Hg, Pb, Po; calculated gs and lowest negative parity state deformation, probability distribution for Jπ=1-.3-, 5-, B(E1), B(E3) for complete isotopic chain. Compared with available data. GCM (Generator Coordinate Method) framework model, compared with rotational formula.

doi: 10.1140/epja/i2016-16300-2
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2016RO28      Eur.Phys.J. A 52, 348 (2016)

R.Rodriguez-Guzman, L.M.Robledo

Microscopic description of fission in nobelium isotopes with the Gogny-D1M energy density functional

NUCLEAR STRUCTURE 250,251,252,253,254,255,256,257,258,259,260No; calculated quadrupole, octupole, hexadecupole moments, pairing interaction energy for protons and neutrons, mass excess, fission paths, fission T1/2 using HFB framework CGM and ATD collective masses with D1M Gogny forces.

doi: 10.1140/epja/i2016-16348-x
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2016SC17      Rep.Prog.Phys. 79, 116301 (2016)

N.Schunck, L.M.Robledo

Microscopic theory of nuclear fission: a review

doi: 10.1088/0034-4885/79/11/116301
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2015BA54      Nucl.Phys. A944, 442 (2015)

A.Baran, M.Kowal, P.-G.Reinhard, L.M.Robledo, A.Staszczak, M.Warda

Fission barriers and probabilities of spontaneous fission for elements with Z ≥ 100

NUCLEAR STRUCTURE 258Fm, 262No, 266Rf, 270Sg, 274Hs, 278Ds, 282Cn, 286Fl, 290,292,294,296,298,300,302,304Lv; calculated fission barriers vs quadrupole moment; revised previous paper by different quadrupole moment definition. 266Hs; calculated fission barriers vs quadrupole moment using MM model, Skyrme HFB approach, Gogny HF model.

doi: 10.1016/j.nuclphysa.2015.06.002
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2015DO09      Nucl.Phys. A944, 388 (2015)

J.Dobaczewski, A.V.Afanasjev, M.Bender, L.M.Robledo, Y.Shi

Properties of nuclei in the nobelium region studied within the covariant, Skyrme, and Gogny energy density functionals

NUCLEAR STRUCTURE Z=92-104; calculated levels, J, π, mass excess, moments of inertia using three different EDF (energy-density functionals).

doi: 10.1016/j.nuclphysa.2015.07.015
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2015NO02      Phys.Rev. C 92, 014312 (2015)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo

Spectroscopy of quadrupole and octupole states in rare-earth nuclei from a Gogny force

NUCLEAR STRUCTURE 146,148,150,152,154,156Sm, 148,150,152,154,156,158Gd; calculated levels, J, π, 0+ states, signature splitting, B(E1), B(E2), B(E3), potential energy surfaces in (β2, β3) plane, parameters of sdf-IBM Hamiltonian, correlation energies for 0+ states. Interacting boson model (IBM) with Hamiltonian parameters from mean-field calculations using Gogny energy density functional. comparison with experimental data, and with results of configuration mixing calculations with the Gogny force within the generator coordinate method (GCM). Discussed structure of excited 0+ states and their connection with double-octupole phonons.

doi: 10.1103/PhysRevC.92.014312
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2015RO06      J.Phys.(London) G42, 055109 (2015)

L.M.Robledo

Ground state octupole correlation energy with effective forces

NUCLEAR STRUCTURE A<260; analyzed available data; calculated the ground state octupole correlation energy. D1M variant of the Gogny force.

doi: 10.1088/0954-3899/42/5/055109
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2015RO13      Eur.Phys.J. A 51, 73 (2015)

R.Rodriguez-Guzman, L.M.Robledo, M.M.Sharma

Microscopic description of quadrupole collectivity in neutron-rich nuclei across the N = 126 shell closure

NUCLEAR STRUCTURE 182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216Nd, 184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218Sm, 186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220Gd, 188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222Dy, 190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222,224Er, 192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222,224,226Yb, 194,196,198,200,202,204,206,208,210,212,214,216,218,220,222,224,226,228Hf, 196,198,200,202,204,206,208,210,212,214,216,218,220,222,224,226,228,230W; calculated gs quadrupole deformation, intrinsic deformation, energy potential surfaces, 2n separation energy, mass excess, neutron, proton single-particle energy, J, π using mean field and beyond with Gogny energy density functionals.

doi: 10.1140/epja/i2015-15073-4
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2015RU03      Phys.Rev. C 91, 044301 (2015)

M.Rudigier, K.Nomura, M.Dannhoff, R-B.Gerst, J.Jolie, N.Saed-Samii, S.Stegemann, J.-M.Regis, L.M.Robledo, R.Rodriguez-Guzman, A.Blazhev, Ch.Fransen, N.Warr, K.O.Zell

Evolution of E2 transition strength in deformed hafnium isotopes from new measurements on 172Hf, 174Hf, and 176Hf

NUCLEAR REACTIONS 170,172Yb(α, 2n), E=27 MeV; 174Yb(α, 2n), E=26 MeV; measured conversion-electron momentum spectra using Cologne Orange magnetic spectrometer, Eγ, Iγ, γγ-, (ce)γγ-coin, level half-lives by (ce)γ(t) and γγ(t) methods with emphasis on the first 2+ states. 172,174,176Hf; deduced levels, J, π, B(E2). Comparison with previous results, and with theoretical model calculations.

NUCLEAR STRUCTURE 168,170,172,174,176,178,180Hf; calculated contour plots of the deformation energy surfaces in (β, γ) plane for 168Hf to 176Hf, parameters for the IBM Hamiltonian, levels, J, π, moments of inertia and B(E2) for levels in the ground-state rotational band. Interacting boson model with Hamiltonian from Gogny HFB calculations using the D1M interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.91.044301
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2014GA08      Phys.Rev. C 89, 034313 (2014)

J.E.Garcia-Ramos, K.Heyde, L.M.Robledo, R.Rodriguez-Guzman

Shape evolution and shape coexistence in Pt isotopes: Comparing interacting boson model configuration mixing and Gogny mean-field energy surfaces

NUCLEAR STRUCTURE 172,174,176,178,180,182,184,186,188,190,192Pt; calculated total energy curves as function of β2, energy surface contours in (β, γ) plane, energies of unperturbed regular and intruder IBM bandheads. Interacting boson model with configuration mixing, and Hartree-Fock-Bogolyubov calculations with Gogny-D1S interaction. Detailed comparison of the two methods.

doi: 10.1103/PhysRevC.89.034313
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2014GI07      Phys.Rev. C 90, 054311 (2014)

S.A.Giuliani, L.M.Robledo, R.Rodriguez-Guzman

Dynamic versus static fission paths with realistic interactions

RADIOACTIVITY 232,234,236,238U(SF); calculated HFB energy, collective inertia, and action as functions of particle number fluctuation, spontaneous fission half-lives. Barcelona-Catania-Paris-Madrid and Gogny D1M energy density functionals using the minimum action principle with the adiabatic time dependent HFB (ATDHFB)ATDHFB and generator coordinate method (GCM). Comparison with experimental data.

doi: 10.1103/PhysRevC.90.054311
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2014LE03      Phys.Rev. C 89, 011306 (2014)

J.Le Bloas, N.Pillet, M.Dupuis, J.M.Daugas, L.M.Robledo, C.Robin, V.G.Zelevinsky

First characterization of sd-shell nuclei with a multiconfiguration approach

NUCLEAR STRUCTURE 20,22,24,26,28Ne, 22,24,26,28,30Mg, 24,26,28,30,32Si, 26,28,30,32,34S, 30,32,34,36Ar; calculated binding energies, S(2n), S(2p), energies and B(E2) of first 2+ states, magnetic dipole and electric static quadrupole moments, B(M1) for transitions between low-lying 1+, 2+ and 3+ states in spherical Hartree-Fock (HF) and multiparticle-multihole configuration mixing (CM) approximations with D1S Gogny interaction. Comparison with experimental values.

doi: 10.1103/PhysRevC.89.011306
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2014RO03      Phys.Rev. C 89, 021303 (2014)

L.M.Robledo, R.N.Bernard, G.F.Bertsch

Spin constraints on nuclear energy density functionals

NUCLEAR STRUCTURE 164,166,168Ho, 168,170,172Tm, 172,174,176Lu, 180,182,184Ta, 184,186,188Lu; calculated spin splittings of neutron-proton two-quasiparticle configurations for 100-225 doublets for each of the odd-odd nucleus using D1S and D1M interactions. Comparison with Gallagher-Moszkowski (GM) rule for perturbative results for two-body interaction, three-body interaction, and the full interaction. Discussed violation of GM rule, and generalization of the three-body interaction.

doi: 10.1103/PhysRevC.89.021303
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2014RO09      Phys.Rev. C 89, 054310 (2014)

R.Rodriguez-Guzman, L.M.Robledo

Microscopic description of fission in uranium isotopes with the Gogny energy density functional

RADIOACTIVITY 232,234,236,238,240,242,244,246,248,250,252,254,256,258,260,262,264,266,268,270,272,274,276,278,280U, 238,240,242,244Pu, 240,242,244,246,248Cm, 250,252Cf, 250,252,254,256Fm, 252,254,256No, 256,258,260Rf, 258,260,262Sg, 264Hs, 286Fl(SF); calculated heights of the inner and second barriers, excitation energies of the fission isomers, density contours of some uranium isotopes, HFB plus the zero-point rotational energies, SF half-lives, proton, neutron and mass numbers of fission fragments, S(2n) as function of neutron number. Constrained Hartree-Fock-Bogoliubov (HDF) approximation based on Gogny-like energy density functionals (EDFs). Investigated role of γ degree of freedom by means of triaxial calculations. Discussed uncertainties in predicted SF half-lives arising from building blocks affecting the WKB formula. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.054310
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2014RO24      Eur.Phys.J. A 50, 142 (2014)

R.Rodriguez-Guzman, L.M.Robledo

Microscopic description of fission in neutron-rich plutonium isotopes with the Gogny-D1M energy density functional

doi: 10.1140/epja/i2014-14142-6
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2013AL05      Nucl.Phys. A899, 1 (2013); Erratum Nucl.Phys. A947, 260 (2016)

M.Albers, K.Nomura, N.Warr, A.Blazhev, J.Jolie, D.Mucher, B.Bastin, C.Bauer, C.Bernards, L.Bettermann, V.Bildstein, J.Butterworth, M.Cappellazzo, J.Cederkall, D.Cline, I.Darby, S.Das Gupta, J.M.Daugas, T.Davinson, H.De Witte, J.Diriken, D.Filipescu, E.Fiori, C.Fransen, L.P.Gaffney, G.Georgiev, R.Gernhauser, M.Hackstein, S.Heinze, H.Hess, M.Huyse, D.Jenkins, J.Konki, M.Kowalczyk, T.Kroll, R.Krucken, J.Litzinger, R.Lutter, N.Marginean, C.Mihai, K.Moschner, P.Napiorkowski, B.S.Nara Singh, K.Nowak, J.Pakarinen, M.Pfeiffer, D.Radeck, P.Reiter, S.Rigby, L.M.Robledo, R.Rodriguez-Guzman, M.Rudigier, M.Scheck, M.Seidlitz, B.Siebeck, G.S.Simpson, P.Thole, T.Thomas, J.Van de Walle, P.Van Duppen, M.Vermeulen, D.Voulot, R.Wadsworth, F.Wenander, K.Wimmer, K.O.Zell, M.Zielinska

Shape dynamics in neutron-rich Kr isotopes: Coulomb excitation of 92Kr, 94Kr and 96Kr

NUCLEAR REACTIONS 194,196Pt(92Kr, 92Kr'), (94Kr, 94Kr'), (96Kr, 96Kr'), E=2.85 MeV/nucleon; measured projectile and target E, I(θ, t) using DSSD, Eγ, Iγ(θ) from Coulomb excitation using HPGe array and considering Doppler correction, (particle)γ-coin; calculated electromagnetic matrix elements, γ-ray yields using CC code GOSIA2, energy vs deformation using IBM-2 with self-consistent constrained HFB with Gogny functional; deduced Coulomb excitation σ, electromagnetic matrix elements using fit to data, B(E2), quadrupole moments, IBM-2 Hamiltonian parameters. 96Kr calculated levels, J, π; deduced shape coexistence.

doi: 10.1016/j.nuclphysa.2013.01.013
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2013BA33      Phys.Rev. C 87, 064305 (2013)

M.Baldo, L.M.Robledo, P.Schuck, X.Vinas

New Kohn-Sham density functional based on microscopic nuclear and neutron matter equations of state

NUCLEAR STRUCTURE Z=8-116, N=4-154; calculated binding energies; analyzed differences between the calculated and experimental values from AME-2003 for 579 nuclei; deduced energy rms value. N=4-154; calculated rms charge radii for even-even nuclei and compared with evaluated experimental values. Quadrupole and octupole deformations calculated for 818 nuclei. 240Pu, 262Sg; calculated spontaneous fission barrier heights, SF half-lives, quadrupole, octupole and hexadecapole moments. Comparison with experimental data. 90Zr, 144Sm, 208Pb, 106,110,112,114,116Cd, 112,114,116,118,120,122,124Sn; calculated energies of isoscalar giant monopole and quadrupole (ISGMR, ISGQR) resonances with and without pairing. Comparison with experimental data. A new version of Barcelona-Catania-Paris energy functional based on calculated ab initio nuclear and neutron matter equations of state. Comparison with other mean-field theories.

doi: 10.1103/PhysRevC.87.064305
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2013GA23      Nature 497, 199 (2013)

L.P.Gaffney, P.A.Butler, M.Scheck, A.B.Hayes, F.Wenander, M.Albers, B.Bastin, C.Bauer, A.Blazhev, S.Bonig, N.Bree, J.Cederkall, T.Chupp, D.Cline, T.E.Cocolios, T.Davinson, H.De Witte, J.Diriken, T.Grahn, A.Herzan, M.Huyse, D.G.Jenkins, D.T.Joss, N.Kesteloot, J.Konki, M.Kowalczyk, Th.Kroll, E.Kwan, R.Lutter, K.Moschner, P.Napiorkowski, J.Pakarinen, M.Pfeiffer, D.Radeck, P.Reiter, K.Reynders, S.V.Rigby, L.M.Robledo, M.Rudigier, S.Sambi, M.Seidlitz, B.Siebeck, T.Stora, P.Thoele, P.Van Duppen, M.J.Vermeulen, M.von Schmid, D.Voulot, N.Warr, K.Wimmer, K.Wrzosek-Lipska, C.Y.Wu, M.Zielinska

Studies of pear-shaped nuclei using accelerated radioactive beams

NUCLEAR REACTIONS 60Ni, 112,114Cd, 120Sn(220Rn, 220Rn'), (224Ra, 224Ra'), E=2.82, 2.83 MeV/nucleon; [220Rn and 224Ra secondary beams from U(p, X), E=1.4 GeV primary reaction]; measured Eγ, Iγ, γγ-, (particle)γγ-, (particle)(particle)γ-coin using Miniball array and DSSSDs at REX-EBIS-ISOLDE-CERN facility. 220Rn, 224Ra; deduced levels, J, π, γ-branching ratios, electromagnetic matrix elements, B(E1), B(E2), B(E3), Q1, Q2, Q3, octupole collectivity and deformation. Discussed electric dipole moment (EDM). Coulomb excitation data analyzed using GOSIA computer code. Comparison with self-consistent mean-field theory, and cluster model calculations. Systematics of Q1, Q2 and Q3 for 218,220,222,224,226Rn, 220,222,224,226,228Ra.

doi: 10.1038/nature12073
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2013GI06      Phys.Rev. C 88, 054325 (2013)

S.A.Giuliani, L.M.Robledo

Fission properties of the Barcelona-Catania-Paris-Madrid energy density functional

RADIOACTIVITY 226,228,230,232,234,236,238,240,242,244,246,248,250,252,254,256,258,260,262,264,266,268,270,272,274,276,278,280,282U, 238,240,242,244Pu, 240,242,244,246,248Cm, 250,252Cf, 250,252,254,256Fm, 252,254,256No, 256,258,260Rf, 258,260,262Sg, 264Hs, 286Fl(SF); calculated SF half-lives, fission barrier height parameters and excitation energies of fission isomers, Z, N and A of emitted fragments, HFB energies as a function of the quadrupole moment Q20. Barcelona-Catania-Paris-Madrid (BCPM) energy density functional with mean-field techniques. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.054325
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2013NO05      Phys.Rev. C 87, 064313 (2013)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo

Shape evolution and the role of intruder configurations in Hg isotopes within the interacting boson model based on a Gogny energy density functional

NUCLEAR STRUCTURE 172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204Hg; calculated microscopic DIM and mapped potential energy surface contours in (β, γ) plane, single particle energies as function of β2 deformation parameter, levels, J, π, B(E2), spectroscopic quadrupole moments of first two 2+ states, transition quadrupole moments of higher spin states, fraction of intruder 2p-2h configuration, rms charge radii of ground-states, and E0 parameters from excited 0+ states. Shape coexistence and complex shape dynamics in Hg isotopes. Interacting boson model, constrained Hartree-Fock-Bogoliubov (HFB) calculations using the Gogny-D1M energy density functional. Comparison with experimental data.

doi: 10.1103/PhysRevC.87.064313
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2013RO30      Phys.Rev. C 88, 051302 (2013)

L.M.Robledo, P.A.Butler

Quadrupole-octupole coupling in the light actinides

NUCLEAR STRUCTURE 220Rn, 224Ra, 228,232Th; calculated contour plots of the HFB energy surfaces in (Q20, Q30) plane, 1- and 2+ energy levels, associated B(E1), B(E2) and B(E3). 216,218,220,222,224,226,228Rn, 218,220,222,224,226,228,230Ra, 220,222,224,226,228,230,232Th; calculated level energies of 1- states, B(E1), B(E3). Comparison with experimental data. Two-dimensional Generator coordinate method (GCM) calculation for quadrupole-octupole coupling using DIS and DIM Gogny forces.

doi: 10.1103/PhysRevC.88.051302
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2012AL03      Phys.Rev.Lett. 108, 062701 (2012); Erratum Phys.Rev.Lett. 109, 209904 (2012)

M.Albers, N.Warr, K.Nomura, A.Blazhev, J.Jolie, D.Mucher, B.Bastin, C.Bauer, C.Bernards, L.Bettermann, V.Bildstein, J.Butterworth, M.Cappellazzo, J.Cederkall, D.Cline, I.Darby, S.Das Gupta, J.M.Daugas, T.Davinson, H.De Witte, J.Diriken, D.Filipescu, E.Fiori, C.Fransen, L.P.Gaffney, G.Georgiev, R.Gernhauser, M.Hackstein, S.Heinze, H.Hess, M.Huyse, D.Jenkins, J.Konki, M.Kowalczyk, T.Kroll, R.Krucken, J.Litzinger, R.Lutter, N.Marginean, C.Mihai, K.Moschner, P.Napiorkowski, B.S.Nara Singh, K.Nowak, T.Otsuka, J.Pakarinen, M.Pfeiffer, D.Radeck, P.Reiter, S.Rigby, L.M.Robledo, R.Rodriguez-Guzman, M.Rudigier, P.Sarriguren, M.Scheck, M.Seidlitz, B.Siebeck, G.Simpson, P.Thole, T.Thomas, J.Van de Walle, P.Van Duppen, M.Vermeulen, D.Voulot, R.Wadsworth, F.Wenander, K.Wimmer, K.O.Zell, M.Zielinska

Evidence for a Smooth Onset of Deformation in the Neutron-Rich Kr Isotopes

NUCLEAR REACTIONS 194,196Pt(94Kr, 94Kr'), (96Kr, 96Kr'), 285 MeV/nucleon; measured reaction products, Eγ, Iγ. 94,96Kr; deduced J, π, B(E2), spectroscopic quadrupole moments. Comparison with IBM calculations based on the constrained HFB approach using the microscopic Gogny-D1M energy density functional.

doi: 10.1103/PhysRevLett.108.062701
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2012BE04      Phys.Rev.Lett. 108, 042505 (2012)

G.F.Bertsch, L.M.Robledo

Symmetry Restoration in Hartree-Fock-Bogoliubov Based Theories

doi: 10.1103/PhysRevLett.108.042505
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2012NO07      Phys.Rev. C 86, 034322 (2012)

K.Nomura, R.Rodriguez-Guzman, L.M.Robledo, N.Shimizu

Shape coexistence in lead isotopes in the interacting boson model with a Gogny energy density functional

NUCLEAR STRUCTURE 182,184,186,188,190,192Pb; calculated levels, J, π, potential energy surface contours in β-γ plane, B(E2), configuration, spectroscopic quadrupole moments using interacting boson model (IBM) model plus configuration mixing with microscopic input based on the Gogny energy density functional (EDF). Evolution of the shape coexistence in the neutron-deficient lead isotopes. Comparison with experimental data.

doi: 10.1103/PhysRevC.86.034322
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2012RO27      Phys.Rev. C 86, 034336 (2012)

R.Rodriguez-Guzman, L.M.Robledo, P.Sarriguren

Microscopic description of quadrupole-octupole coupling in Sm and Gd isotopes with the Gogny energy density functional

NUCLEAR STRUCTURE 146,148,150,152,154Sm, 148,150,152,154,156Gd; calculated mean-field potential energy surfaces in Q20-Q30 plane, B(E1), B(E3), proton and neutron pairing energies, electric dipole moment D, quadrupole moment Q20 and octupole moment Q30, single-particle energies as function of quadrupole and octupole moments, parity-projected potential energy surface contours, dynamical dipole, quadrupole and octupole moments. Gogny-DIS and Gogny-DIM energy density functionals. Comparison with experimental data.

doi: 10.1103/PhysRevC.86.034336
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2012RO29      J.Phys.(London) G39, 105103 (2012)

L.M.Robledo, R.R.Rodriguez-Guzman

Octupole deformation properties of actinide isotopes within a mean-field approach

NUCLEAR STRUCTURE 220,222,224,226,228,230,232,234,236,238,240U, 222,224,226,228,230,232,234,236,238,240,242Pu, 222,224,226,228,230,232,234,236,238,240,242Cm, 222,224,226,228,230,232,234,236,238,240,242Cf; calculated octupole deformation, B(E1), B(E3). Systematic mean-field calculations, comparison with experimental data.

doi: 10.1088/0954-3899/39/10/105103
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2012RO39      Phys.Rev. C 86, 054306 (2012)

L.M.Robledo, G.F.Bertsch

Electromagnetic transition strengths in soft deformed nuclei

NUCLEAR STRUCTURE 24,32Mg, 48,62Cr, 78,92Kr, 144,160Gd, 164,180Hf, 194,208Pb, 234,244Pu; Z=10-94, N=10-160; calculated B(E2), B(E3) as function of β2 for 818 even-even nuclei with exact angular momentum projection with the rotational formula and spherical limit. Mean-field wave functions in the Hartree-Fock-Bogoliubov approximation with Gogny D1S interaction assuming axial symmetry. Proposed an interpolation formula describing transition strengths over entire range of deformations.

doi: 10.1103/PhysRevC.86.054306
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2012RO40      Phys.Rev. C 86, 064313 (2012)

L.M.Robledo, R.Bernard, G.F.Bertsch

Pairing gaps in the Hartree-Fock-Bogoliubov theory with the Gogny D1S interaction

NUCLEAR STRUCTURE Z=8, N=9-19; Z=50, N=49-87; Z=62, N=77-113; Z=82, N=95-133; Z=92, N=131-149; calculated neutron pairing gaps in odd-A nuclei using a new method to find HFB minima. Hartree-Fock-Bogoliubov (HFB) theory with Gogny DIS interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.86.064313
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2011DU30      Phys.Rev. C 84, 061301 (2011)

J.Dukelsky, SH.Lerma, L.M.Robledo, R.Rodriguez-Guzman, S.M.A.Rombouts

Exactly solvable pairing Hamiltonian for heavy nuclei

NUCLEAR STRUCTURE 238U, 154Sm; calculated state-dependent gaps, proton pairing tensor, pairing energies. Exactly solvable Hamiltonian from Richardson-Gaudin models. Comparison with Gogny self-consistent mean-field calculations in the Hartree-Fock basis.

doi: 10.1103/PhysRevC.84.061301
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2011NO01      Phys.Rev. C 83, 014309 (2011)

K.Nomura, T.Otsuka, R.Rodriguez-Guzman, L.M.Robledo, P.Sarriguren

Structural evolution in Pt isotopes with the interacting boson model Hamiltonian derived from the Gogny energy density functional

NUCLEAR STRUCTURE 172,174,176,178,180,182,184,186,188,190,192,194,196,198,200Pt; calculated potential energy surfaces in the β-γ plane, low-lying spectra of g.s., quasi β and quasi γ bands, B(E2) values, Level schemes for 184,186,188,190,192,194Pt nuclei. Interacting boson model (IBM) Hamiltonian from constrained Hartree-Fock-Bogoliubov (HFB) calculations with the finite range and density-dependent Gogny-D1S energy density functional. Shape transition in Pt nuclei. Comparison with experimental data.

doi: 10.1103/PhysRevC.83.014309
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2011NO05      Phys.Rev. C 83, 054303 (2011)

K.Nomura, T.Otsuka, R.Rodriguez-Guzman, L.M.Robledo, P.Sarriguren, P.H.Regan, P.D.Stevenson, Zs.Podolyak

Spectroscopic calculations of the low-lying structure in exotic Os and W isotopes

NUCLEAR STRUCTURE 186,188,190,192,194,196,198Os, 184,186,188,190,192,194,196W; calculated levels, J, π, B(E2), potential energy surfaces, g.s. and quasi γ bands. Interacting boson model (IBM) Hamiltonian determined by (constrained) Hartree-Fock-Bogoliubov calculations with the Gogny-D1S energy density functional (EDF). Comparison with experimental data.

doi: 10.1103/PhysRevC.83.054303
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2011NO15      Phys.Rev. C 84, 054316 (2011)

K.Nomura, T.Otsuka, R.Rodriguez-Guzmin, L.M.Robledo, P.Sarriguren

Collective structural evolution in neutron-rich Yb, Hf, W, Os, and Pt isotopes

NUCLEAR STRUCTURE 180,182,184,186,188,190,192Yb, 182,184,186,188,190,192,194Hf, 184,186,188,190,192,194,196W, 186,188,190,192,194,196,198Os, 188,190,192,194,196,198,200Pt; calculated potential energy surfaces, ground-state correlation energies, moments of inertia, low-lying levels, J, π, B(E2) ratios. Interacting-boson-model (IBM) Hamiltonian from constrained Hartree-Fock-Bogoliubov calculations with the Gogny-DIM energy density functional. Comparison with experimental data.

doi: 10.1103/PhysRevC.84.054316
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2011RO08      Phys.Rev. C 83, 044307 (2011)

R.Rodriguez-Guzman, P.Sarriguren, L.M.Robledo

Shape evolution in yttrium and niobium neutron-rich isotopes

NUCLEAR STRUCTURE 87,89,91,93,95,97,99,101,103,105,107Y, 89,91,93,95,97,99,101,103,105,107,109Nb; calculated levels, J, π, charge radii, S(2n), one-quasiproton configurations, quadrupole deformations. 100Zr; calculated proton single-particle energies versus quadrupole deformation parameter. 92,94,96,98Kr; calculated Q-γ planes. Z=36-42, N=46-64; calculated charge radii. Self-consistent Hartree-Fock-Bogoliubov calculations with Gogny interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.83.044307
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2011RO27      Phys.Rev. C 84, 014307 (2011)

L.M.Robledo

Technical aspects of the evaluation of the overlap of Hartree-Fock-Bogoliubov wave functions

doi: 10.1103/PhysRevC.84.014307
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