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NSR database version of May 24, 2024.

Search: Author = R.Rodriguez-Guzman

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


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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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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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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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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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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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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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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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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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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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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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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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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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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2011HA48      Eur.Phys.J. A 47, 129 (2011)

J.Hakala, R.Rodriguez-Guzman, V.-V.Elomaa, T.Eronen, A.Jokinen, V.S.Kolhinen, I.D.Moore, H.Penttila, M.Reponen, J.Rissanen, A.Saastamoinen, J.Aysto

Precision mass measurements of neutron-rich Y, Nb, Mo, Tc, Ru, Rh, and Pd isotopes

RADIOACTIVITY 102,103Y, 108Nb, 113Tc, 114,116Ru, 119Rh, 118,120,121,122Pd, 114Tc, 111Mo(β-)[from proton-induced fission]; measured cyclotron frequency; deduced mass excess, 2n, 2p separation energies using reference ions; calculated mass excess using HFB with Gogny D1S force and D1N Gogny Energy Density Functional. JYFLTRAP Penning trap mass spectrometer. Compared with AME.

doi: 10.1140/epja/i2011-11129-9
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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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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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2010RO06      Phys.Rev. C 81, 024310 (2010)

R.Rodriguez-Guzman, P.Sarriguren, L.M.Robledo, J.E.Garcia-Ramos

Mean field study of structural changes in Pt isotopes with the Gogny interaction

NUCLEAR STRUCTURE 166,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204Pt; calculated potential energy curves as function of axial quadrupole moment, Q-γ triaxial planes, mean field excitation energies, quadrupole moment, γ deformation parameter, neutron and proton pairing energies, Thouless-Valatin moments of inertia as function of atomic mass, and spherical occupancies in the proton and neutron ground-state wave functions using the self-consistent Hartree-Fock-Bogoliubov approximation with DIS, DIN, and DIM Gogny interactions. 180,188,202Pt; calculated neutron and proton single particle energies as functions of axial quadrupole moment and γ deformation parameter.

doi: 10.1103/PhysRevC.81.024310
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2010RO17      Phys.Lett. B 691, 202 (2010)

R.Rodriguez-Guzman, P.Sarriguren, L.M.Robledo, S.Perez-Martin

Charge radii and structural evolution in Sr, Zr, and Mo isotopes

NUCLEAR STRUCTURE 86,88,90,92,94,96,98,100,102,104,106Sr, 88,90,92,94,96,98,100,102,104,106,108Zr, 88,90,92,94,96,98,100,102,104,106,108Mo; calculated charge radii, neutron separation energies; deduced structure effects, deformation. HFB calculation based on Gogny-D1S.

doi: 10.1016/j.physletb.2010.06.035
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2010RO27      Phys.Rev. C 82, 044318 (2010)

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

Systematics of one-quasiparticle configurations in neutron-rich odd Sr, Zr, and Mo isotopes with the Gogny energy density functional

NUCLEAR STRUCTURE 90,92,94,96,98Sr, 92,94,96,98,100Zr, 94,96,98,100,102Mo; calculated potential energy curves as function of axial quadrupole moment. 85,87,89,91,93,95,97,99,101,103,105Sr, 87,89,91,93,95,97,99,101,103,105,107Zr, 89,91,93,95,97,99,101,103,105,107,109Mo; calculated one-quasineutron levels, J, π, configurations using Hartree-Fock-Bogoliubov (HFB)+ equal filling approximation (EFA)+generator coordinate method (GCM) framework. Comparison with experimental data.

doi: 10.1103/PhysRevC.82.044318
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2010RO31      Phys.Rev. C 82, 061302 (2010)

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

Signatures of shape transitions in odd-A neutron-rich rubidium isotopes

NUCLEAR STRUCTURE 85,87,89,91,93,95,97,99,101,103,105Rb; calculated one-quasiproton configurations, ground-state spins and parities, quadrupole deformation parameters, charge radii and S(2n) using self-consistent Hartree-Fock-Bogoliubov with Gogny interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.82.061302
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2010SA40      J.Phys.:Conf.Ser. 205, 012024 (2010)

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

Microscopic description of shape evolution in medium-mass nuclei

NUCLEAR STRUCTURE 130Xe, 144,146,148,150,152,154,156,158Sm, 184,186,188,190,192,194,196W; calculated quadrupole moment, deformation including tri-axial degrees of freedom, potential energy surface, evolution of ground-state nuclear shapes. 190W; calculated single-particle levels. Self-consistent HFB with Gogny and Skyrme density-dependent interactions.

doi: 10.1088/1742-6596/205/1/012024
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2010TO02      Phys.Rev. C 81, 034312 (2010)

J.Toivanen, B.G.Carlsson, J.Dobaczewski, K.Mizuyama, R.R.Rodriguez-Guzman, P.Toivanen, P.Vesely

Linear response strength functions with iterative Arnoldi diagonalization

NUCLEAR STRUCTURE 132Sn; calculated 0+, 1- and 2+ RPA strength functions for isoscalar (IS) and isovector (IV) transitions using iterative non-Hermitian Arnoldi diagonalization procedures.

doi: 10.1103/PhysRevC.81.034312
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2009RO20      J.Phys.(London) G36, 115104 (2009)

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

Role of triaxiality in the ground-state shape of 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, 184,186,188,190,192,194,194W, 186,188,190,192,194,196,198Os, 188,190,192,194,196,198,200Pt; calculated mean-field energies, single-particle energies, static moments of inertia. Self-consistent HFB approximation.

doi: 10.1088/0954-3899/36/11/115104
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2009ZI01      Phys.Rev. C 80, 014317 (2009)

M.Zielinska, A.Gorgen, E.Clement, J.-P.Delaroche, M.Girod, W.Korten, A.Burger, W.Catford, C.Dossat, J.Iwanicki, J.Libert, J.Ljungvall, P.J.Napiorkowski, A.Obertelli, D.Pietak, R.Rodriguez-Guzman, G.Sletten, J.Srebrny, Ch.Theisen, K.Wrzosek

Shape of 44Ar: Onset of deformation in neutron-rich nuclei near 48Ca

NUCLEAR REACTIONS 109Ag(44Ar, 44Ar'), E=2.68 MeV/nucleon; 208Pb(44Ar, 44Ar'), E=3.68 MeV/nucleon; measured Eγ, Iγ, (particle)γ-coin, γ yields. 44Ar; deduced levels, B(E2) matrix elements, spectroscopic quadrupole moments. Comparisons with experimental data for neighboring A=42-46 Ar, S and Si nuclides and GCM(GOA), AMPGCM, and Shell model calculations.

NUCLEAR STRUCTURE 42Si, 44S, 42,44,46Ar; calculated potential energy surfaces, energies of first 2+ states, B(E2) and quadrupole moments using Hartree-Fock-Bogoliubov formalism with Gogny DIS interaction. 38,40,4244,46,48Ar; calculated mean-square charge radii using GCM(GOA) and spherical Skyrme SGII Hartree-Fock formalism. Comparisons with experimental data.

doi: 10.1103/PhysRevC.80.014317
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2008RO15      Phys.Rev. C 77, 064308 (2008)

R.Rodriguez-Guzman, Y.Alhassid, G.F.Bertsch

Effective shell model Hamiltonians from density functional theory: Quadrupolar and pairing correlations

NUCLEAR STRUCTURE 20Ne, 24Mg, 36Ar; calculated correlation energy, occupation probabilities of valence orbitals, deformation energies, pairing energies, energy curves, coupling constants. Hartree-Fock plus Bardeen-Cooper-Schrieffer approximation with Skyrme energy density functional.

doi: 10.1103/PhysRevC.77.064308
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2008RO22      Phys.Rev. C 78, 034314 (2008)

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

Evolution of nuclear shapes in medium mass isotopes from a microscopic perspective

NUCLEAR STRUCTURE 96,98,100,102,104,106,108,110,112,114,116,118Pd, 118,120,122,124,126,128,130,132,134,136,138,140Xe, 118,120,122,124,126,128,130,132,134,136,138Ba, 146,148,150,152,154,156,158,160Sm, 142,144,146,148,150,152,154,156Nd, 148,150,152,154,156,158,160Gd, 146,148,150,152,154,156,158,160,162Dy; calculated potential energy curves and surfaces as a function of deformation parameters and quadrupole moment. Hartree-Fock-Bogoliubov approximation based on finite range and density dependant Gogny interaction.

doi: 10.1103/PhysRevC.78.034314
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2008SA21      Phys.Rev. C 77, 064322 (2008)

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

Shape transitions in neutron-rich Yb, Hf, W, Os, and Pt isotopes within a Skyrme Hartree-Fock + BCS approach

NUCLEAR STRUCTURE 176,178,180,182,184,186,188,190,192Yb, 178,180,182,184,186,188,190,192,194Hf, 180,182,184,186,188,190,192,194,196W, 182,184,186,188,190,192,194,196,198Os, 184,186,188,190,192,194,196,198,200Pt; calculated ratio of excitation energies between first 4+ and 2+ states, potential energy curves, intrinsic quadrupole moments, moments of inertia. Skyrme Hartree-Fock with BCS model.

doi: 10.1103/PhysRevC.77.064322
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2007RO26      Phys.Rev. C 76, 064303 (2007)

R.Rodriguez-Guzman, P.Sarriguren

E(5) and X(5) shape phase transitions within a Skyrme-Hartree-Fock + BCS approach

NUCLEAR STRUCTURE 96,98,100,102,104,106,108,110,112,114Pd, 118,120,122,124,126,128,130,132,134,136Xe, 120,122,124,126,128,130,132,134,136,138Ba, 142,144,146,148,150,152,154,156Nd, 144,146,148,150,152,154,156,158Sm, 146,148,150,152,154,156Gd, 148,150,152,154,156,158Dy; calculated E(5) and X(5) symmetries, deformation parameters, potential energy curves. Skyrme-Hartree-Fock model.

doi: 10.1103/PhysRevC.76.064303
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2005RO10      Phys.Rev. C 71, 044313 (2005)

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

Quality of the restricted variation after projection method with angular momentum projection

NUCLEAR STRUCTURE 32,34Mg; calculated level energies, quadrupole moments. Role of additional variational coordinates discussed.

doi: 10.1103/PhysRevC.71.044313
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2004EG02      Phys.Rev.Lett. 93, 082502 (2004)

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

Unveiling the Origin of Shape Coexistence in Lead Isotopes

NUCLEAR STRUCTURE 182,184,186,188,190,192Pb; calculated level energies vs deformation, shape coexistence features. HFB approach, Gogny force.

doi: 10.1103/PhysRevLett.93.082502
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2004RO05      Eur.Phys.J. A 19, 45 (2004)

R.R.Rodriguez-Guzman, K.W.Schmid

Spherical Hartree-Fock calculations with linear-momentum projection before the variation Part I: Energies, form factors, charge densities and mathematical sum rules

NUCLEAR STRUCTURE 4He, 12C, 16O, 28Si, 32S, 40Ca; calculated binding energies, hole energies, form factors, charge densities. Spherical Hartree-Fock calculations with linear-momentum projection.

doi: 10.1140/epja/i2003-10108-1
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2004RO06      Eur.Phys.J. A 19, 61 (2004)

R.R.Rodriguez-Guzman, K.W.Schmid

Spherical Hartree-Fock calculations with linear-momentum projection before the variation Part II: Spectral functions and spectroscopic factors

NUCLEAR STRUCTURE 4He, 12C, 16O, 28Si, 32S, 40Ca; calculated ground-state spectroscopic factors. Spherical Hartree-Fock calculations with linear-momentum projection.

doi: 10.1140/epja/i2003-10109-0
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2004RO10      Int.J.Mod.Phys. E13, 139 (2004)

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

Description of the superdeformed band of 36Ar with the Gogny force

NUCLEAR STRUCTURE 36Ar; calculated superdeformed band energies, B(E2), related features. Self-consistent cranking approach.

doi: 10.1142/S0218301304001862
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2004RO11      Int.J.Mod.Phys. E13, 165 (2004)

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

On the stability of projection after variation solutions

NUCLEAR STRUCTURE 32Mg; calculated deformation energy curves. Projection after variation, stability of solution discussed.

doi: 10.1142/S0218301304001898
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2004RO19      Phys.Rev. C 69, 054319 (2004)

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

Beyond mean field description of shape coexistence in neutron-deficient Pb isotopes

NUCLEAR STRUCTURE 182,184,186,188,190,192Pb; calculated rotational band level energies, quadrupole moments, shape coexistence features. Angular momentum projected generator coordinate method.

doi: 10.1103/PhysRevC.69.054319
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2003RO06      Eur.Phys.J. A 17, 37 (2003)

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

Quadrupole collectivity of neutron-rich neon isotopes

NUCLEAR STRUCTURE 20,22,24,26,28,30,32,34Ne; calculated deformation, transitions B(E2), quadrupole collectivity. Angular momentum projected generator coordinate method.

doi: 10.1140/epja/i2002-10141-6
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2002RO03      Phys.Rev. C65, 024304 (2002)

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

Quadrupole Collectivity in N ≈ 28 Nuclei with the Angular Momentum Projected Generator Coordinate Method

NUCLEAR STRUCTURE 38,40,42,44S, 40Mg, 42Si, 46Ar, 48Ca; calculated levels, quadrupole moments, potential energy surfaces. Angular momentum projected generator coordinate method.

doi: 10.1103/PhysRevC.65.024304
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2002RO32      Nucl.Phys. A709, 201 (2002)

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

Correlations Beyond the Mean Field in Magnesium Isotopes: Angular momentum projection and configuration mixing

NUCLEAR STRUCTURE 20,22,24,26,28,30,32,34,36,38,40Mg; calculated single-particle levels, potential energy surfaces, two-neutron separation energies, level energies, quadrupole moments; deduced configuration mixing effects. Angular momentum projected generator coordinate method.

doi: 10.1016/S0375-9474(02)01019-9
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2001RO27      Acta Phys.Pol. B32, 2385 (2001)

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

Quadrupole Collectivity in the Si Isotopes Around N = 20

NUCLEAR STRUCTURE 32,34,36Si; calculated level energies, deformation, B(E2). Angular momentum projected generator coordinate method.


2000RO06      Phys.Lett. 474B, 15 (2000)

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

Angular Momentum Projected Analysis of Quadrupole Collectivity in 30, 32, 34Mg and 32, 34, 36, 38Si with the Gogny Interaction

NUCLEAR STRUCTURE 30,32,34Mg, 32,34,36,38Si; calculated 2+ levels energy, B(E2), potential energy surfaces. HFB theory, exact angular momentum projection.Comparison with data.

doi: 10.1016/S0370-2693(00)00015-0
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2000RO36      Phys.Rev. C62, 054308 (2000)

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

Properties of the Predicted Superdeformed Bands in 32S

NUCLEAR STRUCTURE 32S; calculated superdeformed band excitation energy, transitions B(E2), moment of inertia, related features. Self-consistent cranking approach.

doi: 10.1103/PhysRevC.62.054308
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2000RO37      Phys.Rev. C62, 054319 (2000)

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

Description of Quadrupole Collectivity in N ≈ 20 Nuclei with Techniques Beyond the Mean Field

NUCLEAR STRUCTURE 30,32,34Mg; calculated collective levels, J, π, B(E2), quadrupole moments. Angular momentum projected generator coordinate method.

doi: 10.1103/PhysRevC.62.054319
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1996DI02      Z.Phys. A354, 409 (1996)

A.Diaz-Torres, F.Guzman-Martinez, R.Rodriguez-Guzman

Level Density and Collective Enhancement Factor of a Compound Nucleus in Non-Adiabatic Approach

NUCLEAR STRUCTURE 240Pu; calculated adiabatical, dynamical coefficient vs temperature, interfragment distance. Nonadiabatic approach.

doi: 10.1007/s002180050063
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