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NSR database version of May 20, 2024.

Search: Author = J.E.Garcia-Ramos

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2023GA24      Phys.Rev. C 108, L031305 (2023)

N.Gavrielov, J.E.Garcia-Ramos, P.Van Isacker, A.Leviatan

Persistent vibrational structure in 110-116Cd

doi: 10.1103/PhysRevC.108.L031305
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2023MA43      Phys.Rev. C 108, 034316 (2023)

E.Maya-Barbecho, S.Baid, J.M.Arias, J.E.Garcia-Ramos

At the borderline of shape coexistence: Mo and Ru

doi: 10.1103/PhysRevC.108.034316
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2022MA18      Phys.Rev. C 105, 034341 (2022)

E.Maya-Barbecho, J.E.Garcia-Ramos

Shape coexistence in Sr isotopes

NUCLEAR STRUCTURE 92,94,96,98,100,102Sr; calculated levels, J, π, energies of the lowest unperturbed regular and intruder 0+ states, B(E2), S(2n), charge mean-square radii, isotope shifts, matrix coherent-state potential energy surfaces in (β, γ) plane, quadrupole deformation parameteres for first three 0 states, coexistence of a prolate and an oblate shape. Interacting boson model calculations with configuration mixing (IBM-CM). Comparison with experimental data.

doi: 10.1103/PhysRevC.105.034341
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2022SA42      Phys.Rev. C 106, 064322 (2022)

A.Saiz, J.-E.Garcia-Ramos, J.M.Arias, L.Lamata, P.Perez-Fernandez

Digital quantum simulation of an extended Agassi model: Using machine learning to disentangle its phase-diagram

doi: 10.1103/PhysRevC.106.064322
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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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2020GA31      Phys.Rev. C 102, 054333 (2020)

J.E.Garcia-Ramos, K.Heyde

Subtle connection between shape coexistence and quantum phase transition: The Zr case

NUCLEAR STRUCTURE 94,96,98,100,102,104,106,108,110Zr; calculated E(first 4+)/E(first 2+), S(2n), radii square with reference to 90Zr, energies of the unperturbed regular and intruder IBM bandheads with reference to ground-state energies, β2 corresponding to the unperturbed regular and intruder configurations, matrix coherent-state potential energy surface along the axial axis, matrix coherent-state potential energy surfaces in (β, γ) plane, U(5) decomposition of the yrast band and other states in regular and the intruder configurations, number of 0+ and other states below 4 MeV excitation, shape coexistence or with a quantum phase transition. 100,102Zr, 152Sm; calculated B(E2) and compared to values in X(5) limit. 94Zr; calculated ρ2(E0) for first excited 0+ state to ground state. Interacting boson model calculations with configuration mixing (IBM-CM). Comparison with experimental data. 90,92,94,96,98,100,102,104,106,108,110Zr; compiled experimental data for levels, J, π, 0+ states, two-nucleon and α transfer strengths to the first excited 0+ states.

doi: 10.1103/PhysRevC.102.054333
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2020GA32      Chin.Phys.C 44, 124101 (2020)

J.E.Garcia-Ramos, J.M.Arias, A.Vitturi

Two-neutron transfer reactions as a tool to study the interplay between shape coexistence and quantum phase transitions

NUCLEAR STRUCTURE Hg, Pt, Zr, Sm; analyzed available data; calculated two-neutron transfer intensities using the Interacting Boson Model (IBM), including its version with configuration mixing (IBM-CM).

doi: 10.1088/1674-1137/abb4ca
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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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2019GA30      Phys.Rev. C 100, 044315 (2019)

J.E.Garcia-Ramos, K.Heyde

Quest of shape coexistence in Zr isotopes

NUCLEAR STRUCTURE 94,96,98,100,102,104,106,108,110Zr; calculated positive-parity levels, J, B(E2), mean-square charge radii, ρ2(E0) for excited 0+ levels, S(2n), absolute energy of the lowest unperturbed regular and intruder first 0+ levels, energies of the two lowest lying regular levels and the lowest-lying intruder levels for J=0+, 2+, 3+, 4+, 5+, 6+ and 8+, B(E2) for levels in yrast bands and non-yrast intraband transitions, mean-field energy surfaces for 98,100,102Zr, intrinsic quadrupole moment, β and γ deformation parameters for first three 0+ states. Interacting boson model with configuration mixing (IBM-CM). Comparison with experimental data. Discussed shape coexistence, and other models such as large-scale shell-model side (LSSM), Monte-Carlo shell model (MCSM), and various mean field methods. 90,92,94,96,98,100,102,104,106,108,110Zr; systematics of experimental positive-parity levels, J, B(E2), spherical and deformed shapes up to 3 MeV excitation. Z=38-42, N=52-68; systematics of experimental S(2n) and difference in charge radii <r2> relative to those of N=50 nuclei.

doi: 10.1103/PhysRevC.100.044315
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2019WR01      Eur.Phys.J. A 55, 130 (2019)

K.Wrzosek-Lipska, K.Rezynkina, N.Bree, M.Zielinska, L.P.Gaffney, A.Petts, A.Andreyev, B.Bastin, M.Bender, A.Blazhev, B.Bruyneel, P.A.Butler, M.P.Carpenter, J.Cederkall, E.Clement, T.E.Cocolios, A.N.Deacon, J.Diriken, A.Ekstrom, C.Fitzpatrick, L.M.Fraile, Ch.Fransen, S.J.Freeman, J.E.Garcia-Ramos, K.Geibel, R.Gernhauser, T.Grahn, M.Guttormsen, B.Hadinia, K.Hadynska-Klek, M.Hass, P.-H.Heenen, R.-D.Herzberg, H.Hess, K.Heyde, M.Huyse, O.Ivanov, D.G.Jenkins, R.Julin, N.Kesteloot, Th.Kroll, R.Krucken, A.C.Larsen, R.Lutter, P.Marley, P.J.Napiorkowski, R.Orlandi, R.D.Page, J.Pakarinen, N.Patronis, P.J.Peura, E.Piselli, L.Prochniak, P.Rahkila, E.Rapisarda, P.Reiter, A.P.Robinson, M.Scheck, S.Siem, K.Singh Chakkal, J.F.Smith, J.Srebrny, I.Stefanescu, G.M.Tveten, P.Van Duppen, J.Van de Walle, D.Voulot, N.Warr, A.Wiens, J.L.Wood

Electromagnetic properties of low-lying states in neutron-deficient Hg isotopes: Coulomb excitation of 182Hg, 184Hg, 186Hg and 188Hg

NUCLEAR REACTIONS 112Cd(182Hg, 182Hg'), E=519 MeV; 120Sn, 107Ag, 112Cd(184Hg, 184Hg'), E=524 MeV; 120Sn, 107Ag, 114Cd(186Hg, 186Hg'), E=530 MeV; 120Sn, 107Ag, 114Cd(188Hg, 188Hg'), E=536 MeV; measured reaction products, Eγ, Iγ, X-rays. 182,184,186,188Hg; deduced γ-ray energies, J, π, transition E2 and M1 reduced matrix elements, branching ratios, B(E2). Comparison with theoretical calculations, GOSIA analysis. The Miniball set-up, REX postaccelerator.

doi: 10.1140/epja/i2019-12815-2
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2018GA13      Phys.Rev. C 97, 054303 (2018)

J.E.Garcia-Ramos, J.Dukelsky, P.Perez-Fernandez, J.M.Arias

Phase diagram of an extended Agassi model

doi: 10.1103/PhysRevC.97.054303
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2018LE12      Phys.Rev. C 98, 031302 (2018)

A.Leviatan, N.Gavrielov, J.E.Garcia-Ramos, P.Van Isacker

Quadrupole phonons in the cadmium isotopes

NUCLEAR STRUCTURE 110Cd; calculated levels, J, π, B(E2) using U(5) partial dynamical symmetries U(5)-DS and U(5)-PDS-CM in the collective and interactive boson models. Comparison with experimental values.

doi: 10.1103/PhysRevC.98.031302
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2017GA07      Phys.Rev. C 95, 054326 (2017)

J.E.Garcia-Ramos, P.Perez-Fernandez, J.M.Arias

Excited-state quantum phase transitions in a two-fluid Lipkin model

doi: 10.1103/PhysRevC.95.054326
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2016GA09      Phys.Rev. C 93, 034336 (2016)

J.E.Garcia-Ramos, P.Perez-Fernandez, J.M.Arias, E.Freire

Phase diagram of the two-fluid Lipkin model: A "butterfly" catastrophe

doi: 10.1103/PhysRevC.93.034336
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2015GA29      Phys.Rev. C 92, 034309 (2015)

J.E.Garcia-Ramos, K.Heyde

Nuclear shape coexistence in Po isotopes: An interacting boson model study

NUCLEAR STRUCTURE 190,192,194,196,198,200,202,204,206,208,210Po; calculated levels, J, π, IBM-CM Hamiltonians, B(E2)¬Ěs, electric quadrupole moments, nuclear radii and isotopic shifts, quadrupole shape invariants, wave functions, and deformations. Interacting boson model with configuration mixing (IBM-CM), by fixing the parameters of the Hamiltonians by a least-squares fit to experimental level energies and absolute B(E2) values. Comparison with experimental data.

doi: 10.1103/PhysRevC.92.034309
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2015KE06      Phys.Rev. C 92, 054301 (2015)

N.Kesteloot, B.Bastin, L.P.Gaffney, K.Wrzosek-Lipska, K.Auranen, C.Bauer, M.Bender, V.Bildstein, A.Blazhev, S.Bonig, N.Bree, E.Clement, T.E.Cocolios, A.Damyanova, I.Darby, H.De Witte, D.DiJulio, J.Diriken, C.Fransen, J.E.Garcia-Ramos, R.Gernhauser, T.Grahn, P.-H.Heenen, H.Hess, K.Heyde, M.Huyse, J.Iwanicki, U.Jakobsson, J.Konki, T.Kroll, B.Laurent, N.Lecesne, R.Lutter, J.Pakarinen, P.Peura, E.Piselli, L.Prochniak, P.Rahkila, E.Rapisarda, P.Reiter, M.Scheck, M.Seidlitz, M.Sferrazza, B.Siebeck, M.Sjodin, H.Tornqvist, E.Traykov, J.Van De Walle, P.Van Duppen, M.Vermeulen, D.Voulot, N.Warr, F.Wenander, K.Wimmer, M.Zielinska

Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes

NUCLEAR REACTIONS 104Pd(196Po, 196Po'), (200Po, 200Po'), (202Po, 202Po'), 94Mo(198Po, 198Po'), (202Po, 202Po'), E=2.85 MeV/nucleon, [secondary Po beams from U(p, X), E=1.4 GeV at REX-ISOLDE-CERN facility]; measured Eγ, Iγ, γγ-coin, (Po x ray)γ-coin, (scattered particle)γ-coin, (particle)γ(t), angular distribution of scattered particles, Coulomb excitation yields for excited states in beams and targets during laser-on and laser-off using double-sided silicon-strip detectors (DSSSDs) for particles and Miniball array for γ rays. 196,198,200,202Po; deduced levels, J, π, E2 matrix elements, B(E2), deformation parameters, transition quadrupole moments. 94Mo, 104Pd; deduced levels, Coulomb excitation yields. GOSIA analysis of Coulomb excitation yields. Comparison with predictions of beyond-mean-field (BMF) model, interacting boson model (IBM), general Bohr Hamiltonian (GBH) model, phenomenological two-level mixing model, and with previous measurement of mean-square charge radii.

doi: 10.1103/PhysRevC.92.054301
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2014BR05      Phys.Rev.Lett. 112, 162701 (2014)

N.Bree, K.Wrzosek-Lipska, A.Petts, A.Andreyev, B.Bastin, M.Bender, A.Blazhev, B.Bruyneel, P.A.Butler, J.Butterworth, M.P.Carpenter, J.Cederkall, E.Clement, T.E.Cocolios, A.Deacon, J.Diriken, A.Ekstrom, C.Fitzpatrick, L.M.Fraile, Ch.Fransen, S.J.Freeman, L.P.Gaffney, J.E.Garcia-Ramos, K.Geibel, R.Gernhauser, T.Grahn, M.Guttormsen, B.Hadinia, K.Hadynska-Klek, M.Hass, P.-H.Heenen, R.-D.Herzberg, H.Hess, K.Heyde, M.Huyse, O.Ivanov, D.G.Jenkins, R.Julin, N.Kesteloot, Th.Kroll, R.Krucken, A.C.Larsen, R.Lutter, P.Marley, P.J.Napiorkowski, R.Orlandi, R.D.Page, J.Pakarinen, N.Patronis, P.J.Peura, E.Piselli, P.Rahkila, E.Rapisarda, P.Reiter, A.P.Robinson, M.Scheck, S.Siem, K.Singh Chakkal, J.F.Smith, J.Srebrny, I.Stefanescu, G.M.Tveten, P.Van Duppen, J.Van de Walle, D.Voulot, N.Warr, F.Wenander, A.Wiens, J.L.Wood, M.Zielinska

Shape Coexistence in the Neutron-Deficient Even-Even 182-188Hg Isotopes Studied via Coulomb Excitation

NUCLEAR REACTIONS 120Sn, 107Ag, 112,114Cd(182Hg, 182Hg'), (184Hg, 184Hg'), (186Hg, 186Hg'), (188Hg, 188Hg'), E=2.85 MeV/nucleon; measured reaction products, Eγ, Iγ. 182,184,186,188Hg; deduced energy levels, J, π, nuclear matrix elements, B(E2). Comparison with IBM calculations, experimental data.

doi: 10.1103/PhysRevLett.112.162701
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2014GA02      Phys.Rev. C 89, 014306 (2014)

J.E.Garcia-Ramos, K.Heyde

Nuclear shape coexistence: A study of the even-even Hg isotopes using the interacting boson model with configuration mixing

NUCLEAR STRUCTURE 172,174,176,178,180,182,184,186,188,190,192,194,196,198,200Hg; calculated levels, J, π, absolute and relative B(E2), quadrupole moments, quadrupole shape invariants, wave functions, isotopic shifts, rms charge radii, mean-field energy surfaces, α-decay hindrance factor. Interacting boson model with configuration mixing. Comparisons with experimental data

doi: 10.1103/PhysRevC.89.014306
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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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2013LE04      Phys.Rev. C 87, 021302 (2013)

A.Leviatan, J.E.Garcia-Ramos, P.Van Isacker

Partial dynamical symmetry as a selection criterion for many-body interactions

NUCLEAR STRUCTURE 156Gd; calculated levels, J, π, bands, B(E2), odd-even staggering. IBM Hamiltonians with SU(3) partial dynamical symmetry (PDS). Triaxial features. Comparison with experimental data.

doi: 10.1103/PhysRevC.87.021302
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2012MU05      Phys.Rev. C 85, 044325 (2012)

I.Mukha, L.Grigorenko, L.Acosta, M.A.G.Alvarez, E.Casarejos, A.Chatillon, D.Cortina-Gil, J.M.Espino, A.Fomichev, J.E.Garcia-Ramos, H.Geissel, J.Gomez-Camacho, J.Hofmann, O.Kiselev, A.Korsheninnikov, N.Kurz, Yu.A.Litvinov, I.Martel, C.Nociforo, W.Ott, M.Pfutzner, C.Rodriguez-Tajes, E.Roeckl, C.Scheidenberger, M.Stanoiu, K.Summerer, H.Weick, P.J.Woods

New states in 18Na and 19Mg observed in the two-proton decay of 19Mg

NUCLEAR REACTIONS 9Be(20Mg, 2p17Ne), [20Mg secondary beam from 9Be(24Mg, X), E=450 MeV/nucleon primary reaction], E not given; measured particle spectra, (proton)(proton)(17Ne)(θ), intensity distribution contours using microstrip detectors. 19Mg, 18Na; deduced decay energies, levels, J, π, proton decay widths. 19Mg; deduced simultaneous and sequential 2p decays from ground states and excited states, dominance of sequential 2p decay from excited states. Comparison with shell model calculations.

RADIOACTIVITY 18Na(p), 19Mg(2p); measured proton branches; deduced one proton and two-proton decay energies. Dominance of direct 2p decay from 19Mg ground state.

doi: 10.1103/PhysRevC.85.044325
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2011FO09      Phys.Rev. C 84, 014326 (2011)

L.Fortunato, C.E.Alonso, J.M.Arias, J.E.Garcia-Ramos, A.Vitturi

Phase diagram for a cubic- Q interacting boson model Hamiltonian: Signs of triaxiality

doi: 10.1103/PhysRevC.84.014326
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2011GA35      Phys.Rev. C 84, 014331 (2011)

J.E.Garcia-Ramos, V.Hellemans, K.Heyde

Platinum nuclei: Concealed configuration mixing and shape coexistence

NUCLEAR STRUCTURE 172,174,176,178,180,182,184,186,188,190,192,194Pt; calculated levels, J, π, unperturbed regular states, intruder states, g factors of first 2+ states, isotope shifts, rms charge radii. 174,180,186,192Pt; calculated unperturbed regular levels, intruder (2p-2h) levels, and levels with fully mixed configuration, B(E2), B(E2) ratios. 176,178,180Pt; calculated α-decay hindrance factors from the decay of 180,182,184Hg nuclei. Interacting boson model with configuration mixing (IBM-CM) calculations. Comparison with experimental data. 180,182,184,186,188,190,192,194,196,198,200,202,204,206,208Pb, 168,170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204Pt, 174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204,206Hg, 176Yb, 178Hf, 180W, 182Os; analyzed systematics of energy spectra of yrast and non-yrast levels.

doi: 10.1103/PhysRevC.84.014331
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2010BA32      Phys.Rev. C 82, 024316 (2010)

J.Barea, J.M.Arias, J.E.Garcia Ramos

Relationship between X(5) models and the interacting boson model

doi: 10.1103/PhysRevC.82.024316
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2010MU12      Phys.Rev. C 82, 054315 (2010)

I.Mukha, K.Summerer, L.Acosta, M.A.G.Alvarez, E.Casarejos, A.Chatillon, D.Cortina-Gil, I.A.Egorova, J.M.Espino, A.Fomichev, J.E.Garcia-Ramos, H.Geissel, J.Gomez-Camacho, L.Grigorenko, J.Hofmann, O.Kiselev, A.Korsheninnikov, N.Kurz, Yu.A.Litvinov, E.Litvinova, I.Martel, C.Nociforo, W.Ott, M.Pfutzner, C.Rodriguez-Tajes, E.Roeckl, M.Stanoiu, N.K.Timofeyuk, H.Weick, P.J.Woods

Spectroscopy of proton-unbound nuclei by tracking their decay products in-flight: One- and two- proton decays of 15F, 16Ne, and 19Na

NUCLEAR REACTIONS 9Be(17Ne, X)16Ne, E=410 MeV/nucleon; 9Be(20Mg, X), E=450 MeV/nucleon; measured Ep, Ip, p(heavy-ion)-coin, p(heavy-ion)(θ), pp(heavy-ion fragment)-coin, pp(heavy-ion fragment)(θ), Monte-Carlo simulations. 14O, 15F, 16Ne; deduced levels, J, resonances, proton-decay modes, widths. 17Ne and 20Mg beams from fragmentation of 24Mg beam at 591 MeV/nucleon.

RADIOACTIVITY 15F, 19Na(p); 16Ne(2p); measured Ep, Ip, p(14O)-coin, p(14O)(θ), p(18Ne)-coin, p(18Ne)(θ), pp(14O)(θ), pp(14O)-coin; deduced decay energies and widths. Monte-Carlo simulations of angular correlation spectra.

doi: 10.1103/PhysRevC.82.054315
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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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2009GA15      Nucl.Phys. A825, 39 (2009)

J.E.Garcia-Ramos, K.Heyde

The Pt isotopes: Comparing the Interacting Boson Model with configuration mixing and the extended consistent-Q formalism

NUCLEAR STRUCTURE 172,174,176,178,180,182,184,186,188,190,192,194Pt; calculated level energies, B(E2), quadrupole moments and effect of intruder states using interacting boson model. Comparison with previous results and data.

doi: 10.1016/j.nuclphysa.2009.04.003
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2009MU09      Phys.Rev. C 79, 061301 (2009)

I.Mukha, N.K.Timofeyuk, K.Summerer, L.Acosta, M.A.G.Alvarez, E.Casarejos, A.Chatillon, D.Cortina-Gil, J.M.Espino, A.Fomichev, J.E.Garcia-Ramos, H.Geissel, J.Gomez-Camacho, L.Grigorenko, J.Hofmann, O.Kiselev, A.Korsheninnikov, N.Kurz, Yu.Litvinov, I.Martel, C.Nociforo, W.Ott, M.Pfutzner, C.Rodriguez-Tajes, E.Roeckl, M.Stanoiu, H.Weick, P.J.Woods

Observation of narrow states in nuclei beyond the proton drip line: 15F and 16Ne

NUCLEAR REACTIONS 9Be(17Ne, X)16Ne/15F, E=450 MeV/nucleon; measured particle spectra, (particle)(proton)(θ), (particle)(proton)(proton)(θ), and widths. 15F, 16Ne; deduced levels, J, π.

doi: 10.1103/PhysRevC.79.061301
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2008GA14      Phys.Rev. C 77, 054307 (2008)

J.E.Garcia-Ramos, J.M.Arias

Relation between E(5) models and the interacting boson model

doi: 10.1103/PhysRevC.77.054307
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2008MU13      Phys.Rev. C 77, 061303 (2008)

I.Mukha, L.Grigorenko, K.Summerer, L.Acosta, M.A.G.Alvarez, E.Casarejos, A.Chatillon, D.Cortina-Gil, J.M.Espino, A.Fomichev, J.E.Garcia-Ramos, H.Geissel, J.Gomez-Camacho, J.Hofmann, O.Kiselev, A.Korsheninnikov, N.Kurz, Yu.Litvinov, I.Martel, C.Nociforo, W.Ott, M.Pfutzner, C.Rodriguez-Tajes, E.Roeckl, M.Stanoiu, H.Weick, P.J.Woods

Proton-proton correlations observed in two-proton decay of 19Mg and 16Ne

RADIOACTIVITY 16Ne, 19Mg(2p); measured decay product trajectories, angular correlations, angular distributions, three-body correlations. 15F, 16Ne, 18Na, 19Mg; deduced levels, J, π.

doi: 10.1103/PhysRevC.77.061303
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2008SA09      Nucl.Phys. A803, 30 (2008)

A.M.Sanchez-Benitez, D.Escrig, M.A.G.Alvarez, M.V.Andres, C.Angulo, M.J.G.Borge, J.Cabrera, S.Cherubini, P.Demaret, J.M.Espino, P.Figuera, M.Freer, J.E.Garcia-Ramos, J.Gomez-Camacho, M.Gulino, O.R.Kakuee, I.Martel, C.Metelko, A.M.Moro, F.Perez-Bernal, J.Rahighi, K.Rusek, D.Smirnov, O.Tengblad, P.Van Duppen, V.Ziman

Study of the elastic scattering of 6He on 208Pb at energies around the Coulomb barrier

NUCLEAR REACTIONS 208Pb(6He, 6He), E=14, 16, 18, 22 MeV; measured σ(θ). Comparison with optical model calculations, including Coulomb dipole polarizability and dispersion relations.

doi: 10.1016/j.nuclphysa.2008.01.030
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1648.


2007AR03      Phys.Rev. C 75, 014301 (2007)

J.M.Arias, J.Dukelsky, J.E.Garcia-Ramos, J.Vidal

Two-level interacting boson models beyond the mean field

doi: 10.1103/PhysRevC.75.014301
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2007ES06      Nucl.Phys. A792, 2 (2007)

D.Escrig, A.M.Sanchez-Benitez, A.M.Moro, M.A.G.Alvarez, M.V.Andres, C.Angulo, M.J.G.Borge, J.Cabrera, S.Cherubini, P.Demaret, J.M.Espino, P.Figuera, M.Freer, J.E.Garcia-Ramos, J.Gomez-Camacho, M.Gulino, O.R.Kakuee, I.Martel, C.Metelko, F.Perez-Bernal, J.Rahighi, K.Rusek, D.Smirnov, O.Tengblad, V.Ziman

α-particle production in the scattering of 6He by 208Pb at energies around the Coulomb barrier

NUCLEAR REACTIONS 208Pb(6He, α), E=14, 16, 18, 22 MeV; measured Eα, Iα, σ(E, θ); deduced reaction mechanism features using DWBA analysis.

doi: 10.1016/j.nuclphysa.2007.05.012
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1654.


2007MU15      Phys.Rev.Lett. 99, 182501 (2007)

I.Mukha, K.Summerer, L.Acosta, M.A.G.Alvarez, E.Casarejos, A.Chatillon, D.Cortina-Gil, J.Espino, A.Fomichev, J.E.Garcia-Ramos, H.Geissel, J.Gomez-Camacho, L.Grigorenko, J.Hoffmann, O.Kiselev, A.Korsheninnikov, N.Kurz, Yu.Litvinov, I.Martel, C.Nociforo, W.Ott, M.Pfutzner, C.Rodriguez-Tajes, E.Roeckl, M.Stanoiu, H.Weick, P.J.Woods

Observation of Two-Proton Radioactivity of 19Mg by Tracking the Decay Products

RADIOACTIVITY 19Mg(2p) [from 9Be(20Mg, 19Mg), E=450 meV/nucleon]; measured Ep, Ip, (17Ne)p-coinc, angular correlations. 19Mg deduced T1/2, 2p-decay Q-value.

doi: 10.1103/PhysRevLett.99.182501
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Data from this article have been entered in the XUNDL database. For more information, click here.


2006VI02      Phys.Rev. C 73, 054305 (2006)

J.Vidal, J.M.Arias, J.Dukelsky, J.E.Garcia-Ramos

Scalar two-level boson model to study the interacting boson model phase diagram in the Casten triangle

doi: 10.1103/PhysRevC.73.054305
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2005DU17      Phys.Rev. C 72, 011301 (2005)

S.Dusuel, J.Vidal, J.M.Arias, J.Dukelsky, J.E.Garcia-Ramos

Finite-size scaling exponents in the interacting boson model

doi: 10.1103/PhysRevC.72.011301
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2005DU27      Phys.Rev. C 72, 064332 (2005)

S.Dusuel, J.Vidal, J.M.Arias, J.Dukelsky, J.E.Garcia-Ramos

Continuous unitary transformations in two-level boson systems

doi: 10.1103/PhysRevC.72.064332
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2005GA43      Phys.Rev. C 72, 037301 (2005)

J.E.Garcia-Ramos, J.Dukelsky, J.M.Arias

β4 potential at the U(5)-O(6) critical point of the interacting boson model

doi: 10.1103/PhysRevC.72.037301
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2005GA58      Eur.Phys.J. A 26, 221 (2005)

J.E.Garcia-Ramos, K.Heyde, R.Fossion, V.Hellemans, S.De Baerdemacker

A theoretical description of energy spectra and two-neutron separation energies for neutron-rich zirconium isotopes

NUCLEAR STRUCTURE 94,96,98,100,102,104Zr; calculated level energies, B(E2), two-neutron separation energies. Interacting boson model.

doi: 10.1140/epja/i2005-10176-1
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2005SA52      J.Phys.(London) G31, S1953 (2005)

A.M.Sanchez-Benitez, D.Escrig, M.A.G.Alvarez, M.V.Andres, C.Angulo, M.J.G.Borge, J.Cabrera, S.Cherubini, J.M.Espino, P.Figuera, M.Freer, J.E.Garcia-Ramos, J.Gomez-Camacho, M.Gulino, O.R.Kakuee, I.Martel, C.Metelco, A.M.Moro, J.Rahighi, K.Rusek, D.Smirnov, O.Tengblad, P.Van Duppen, V.Ziman

Scattering of 6He at energies around the Coulomb barrier

NUCLEAR REACTIONS 208Pb(6He, 6He), (6He, α), E=14, 16, 17, 18, 22 MeV; measured σ(θ); deduced reaction mechanism features.

doi: 10.1088/0954-3899/31/10/109
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1292.


2004AR27      Phys.Rev.Lett. 93, 212501 (2004)

J.M.Arias, J.E.Garcia-Ramos, J.Dukelsky

Phase Diagram of the Proton-Neutron Interaction Boson Model

doi: 10.1103/PhysRevLett.93.212501
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2003AR23      Phys.Rev.Lett. 91, 162502 (2003)

J.M.Arias, J.Dukelsky, J.E.Garcia-Ramos

Quantum Phase Transitions in the Interacting Boson Model: Integrability, Level Repulsion, and Level Crossing

doi: 10.1103/PhysRevLett.91.162502
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2003AR24      Phys.Rev. C 68, 041302 (2003)

J.M.Arias, C.E.Alonso, A.Vitturi, J.E.Garcia-Ramos, J.Dukelsky, A.Frank

U(5)-O(6) transition in the interacting boson model and the E(5) critical point symmetry

doi: 10.1103/PhysRevC.68.041302
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2003GA22      Phys.Rev. C 68, 024307 (2003)

J.E.Garcia-Ramos, J.M.Arias, J.Barea, A.Frank

Phase transitions and critical points in the rare-earth region

NUCLEAR STRUCTURE 144,146,148,150,152,154Nd, 146,148,150,152,154,156,158,160Sm, 148,150,152,154,156,158,160,162Gd, 150,152,154,156,158,160,162,164,166Dy; calculated levels, J, π, B(E2), two-neutron separation energies; deduced phase transitions, related features. Interacting boson model.

doi: 10.1103/PhysRevC.68.024307
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2002FO02      Nucl.Phys. A697, 703 (2002)

R.Fossion, C.De Coster, J.E.Garcia-Ramos, T.Werner, K.Heyde

Nuclear Binding Energies: Global collective structure and local shell-model correlations

NUCLEAR STRUCTURE Z=50-82; analyzed binding energies, two-neutron separation energies; deduced possible shell, deformation, or configuration-mixing effects. Liquid drop model, shell model, interacting boson model.

doi: 10.1016/S0375-9474(01)01270-2
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2002FO04      Phys.Rev. C65, 044309 (2002)

R.Fossion, C.De Coster, J.E.Garcia-Ramos, K.Heyde

Proton-Neutron Quadrupole Interactions: An effective contribution to the pairing field

doi: 10.1103/PhysRevC.65.044309
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2002HE07      Eur.Phys.J. A 13, 401 (2002)

K.Heyde, R.Fossion, J.E.Garcia-Ramos, C.De Coster, R.F.Casten

Differences between Pairing and Zero-Range Effective Interactions for Nuclear Binding Energies

doi: 10.1007/s10050-002-8769-2
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2001GA33      Nucl.Phys. A688, 735 (2001)

J.E.Garcia-Ramos, C.De Coster, R.Fossion, K.Heyde

Two-Neutron Separation Energies, Binding Energies and Phase Transitions in the Interacting Boson Model

NUCLEAR STRUCTURE Sm, Gd, Ru, Pd, Os, Pt; calculated binding energies. 150,152,154,156,158,160,162Gd, 100,102,104,106,108,110,112Pd, 184,186,188,190,192,194,196Pt; calculated level energies, two-neutron separation energies. Interacting boson model, comparisons with data.

doi: 10.1016/S0375-9474(00)00592-3
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2001SC41      Nucl.Phys. A693, 533 (2001)

S.Schwarz, F.Ames, G.Audi, D.Beck, G.Bollen, C.De Coster, J.Dilling, O.Engels, R.Fossion, J.-E.Garcia Ramos, S.Henry, F.Herfurth, K.Heyde, A.Kellerbauer, H.-J.Kluge, A.Kohl, E.Lamour, D.Lunney, I.Martel, R.B.Moore, M.Oinonen, H.Raimbault-Hartmann, C.Scheidenberger, G.Sikler, J.Szerypo, C.Weber, and the ISOLDE Collaboration

Accurate Masses of Neutron-Deficient Nuclides Close to Z = 82

ATOMIC MASSES 179,180,181,182,183,184,185,185m,186,187,187m,188,189m,190,191,191m,192,193,193m,194,195,196,197,197m,200Hg, 196,198,204Pb, 197Bi, 198Po, 203At; measured masses. Penning trap.

doi: 10.1016/S0375-9474(01)00881-8
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2000GA09      Phys.Rev. C61, 034305 (2000)

J.E.Garcia-Ramos, J.M.Arias, J.Dukelsky, P.Van Isacker

Intrinsic State for an Extended Version of the Interacting Boson Model

doi: 10.1103/PhysRevC.61.034305
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2000GA13      Phys.Rev. C61, 047305 (2000)

J.E.Garcia-Ramos, C.E.Alonso, J.M.Arias, P.Van Isacker

Anharmonic Double-γ Vibrations in Nuclei and Their Description in the Interacting Boson Model

NUCLEAR STRUCTURE 166Er; calculated levels, J, π, B(E2), one-, two-phonon vibrational bands features. Interacting boson model.

doi: 10.1103/PhysRevC.61.047305
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2000GA53      Phys.Rev. C62, 064309 (2000)

J.E.Garcia-Ramos, J.M.Arias, P.Van Isacker

Anharmonic Double-Phonon Excitations in the Interacting Boson Model

NUCLEAR STRUCTURE 164Dy, 166,168Er; calculated levels, J, π, B(E2), vibrational bands features; deduced mechanism for anharmonicity. Interacting boson model.

doi: 10.1103/PhysRevC.62.064309
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1999GA30      Ann.Phys.(New York) 274, 45 (1999)

J.E.Garcia-Ramos, P.Van Isacker

The Interacting Boson Model with SU(3) Charge Symmetry and Its Application to Even-Even N ≈ Z Nuclei

NUCLEAR STRUCTURE 44,46,48Ti, 48Cr; calculated levels, J, π, B(M1); deduced symmetry features. Isospin-invariant IBM-3 calculations.

doi: 10.1006/aphy.1999.5911
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1998GA03      Phys.Rev. C57, R479 (1998)

J.E.Garcia-Ramos, J.M.Arias, J.Dukelsky, E.Moya de Guerra, P.Van Isacker

Hartree-Bose Mean-Field Approximation for the Interacting Boson Model (IBM-3)

doi: 10.1103/PhysRevC.57.R479
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1998GA22      Nucl.Phys. A637, 529 (1998)

J.E.Garcia-Ramos, C.E.Alonso, J.M.Arias, P.Van Isacker, A.Vitturi

Intrinsic Structure of Two-Phonon States in the Interacting Boson Model

doi: 10.1016/S0375-9474(98)00243-7
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Note: The following list of authors and aliases matches the search parameter J.E.Garcia-Ramos: J.E.GARCIA RAMOS, J.E.GARCIA-RAMOS