NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = V.Hellemans Found 20 matches. 2013HE26 Phys.Rev. C 88, 064323 (2013) V.Hellemans, A.Pastore, T.Duguet, K.Bennaceur, D.Davesne, J.Meyer, M.Bender, P.-H.Heenen Spurious finite-size instabilities in nuclear energy density functionals NUCLEAR STRUCTURE 16O, 40,48Ca, 78Ni, 176Sn, 208Pb; calculated binding energies; investigated instabilities in energy density functional (EDF) calculations to finite-wavelength instabilities of homogeneous symmetric computed at the RPA level. Nine parameterizations based on traditional form of the Skyrme EDF.Systematic calculations with both HOSPHE and LENTEUR formalisms.
doi: 10.1103/PhysRevC.88.064323
2013PA17 Phys.Scr. T154, 014014 (2013) A.Pastore, D.Davesne, K.Bennaceur, J.Meyer, V.Hellemans Fitting Skyrme functionals using linear response theory NUCLEAR STRUCTURE Z=20, 28, 50, 82; analyzed available data and fitted binding energies, charge radii. Linear response theory in symmetric nuclear matter.
doi: 10.1088/0031-8949/2013/T154/014014
2012CA13 Phys.Rev. C 85, 034324 (2012) M.A.Caprio, F.Q.Luo, K.Cai, V.Hellemans, Ch.Constantinou Generalized seniority for the shell model with realistic interactions NUCLEAR STRUCTURE 41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59Ca; calculated levels, J, π, orbital occupations, quadrupole moments, B(E2), magnetic moment. Comparison between seniority (ν=1-3) model space and full shell-model space.
doi: 10.1103/PhysRevC.85.034324
2012CA30 J.Phys.(London) G39, 105108 (2012) M.A.Caprio, F.Q.Luo, K.Cai, Ch.Constantinou, V.Hellemans Generalized seniority with realistic interactions in open-shell nuclei NUCLEAR STRUCTURE 40,42,44,46,48,50,52,54,56,58,60Ca, 42,44,46,48,50,52,54,56,58,60,62Ti, 44,46,48,50,52,54,56,58,60,62,64Cr; calculated energy levels, J, π, electric quadrupole and dipole magnetic moments. Shell model calculations, FPD6 and GXPF1 interactions, comparison with available data.
doi: 10.1088/0954-3899/39/10/105108
2012HE02 Phys.Rev. C 85, 014326 (2012) V.Hellemans, P.-H.Heenen, M.Bender Tensor part of the Skyrme energy density functional. III. Time-odd terms at high spin NUCLEAR STRUCTURE 152Dy, 194Hg; calculated deformation energy, proton and neutron Nilsson diagrams, dynamical moments of inertia of superdeformed bands, evolution of time-even and time-odd terms in the energy density functional, proton and neutron quasiparticle Routhians. Cranked Hartree-Fock-Bogoliubov approach with several parameterization covering a wide range for the isoscalar and isovector tensor coupling constants. Time-odd tensor terms in Skyrme EDF, effect of variations of their coupling constants, and finite-size instabilities. Comparison with experimental data for superdeformed bands.
doi: 10.1103/PhysRevC.85.014326
2012WA32 Phys.Rev. C 86, 054309 (2012) K.Washiyama, K.Bennaceur, B.Avez, M.Bender, P.-H.Heenen, V.Hellemans New parametrization of Skyrme's interaction for regularized multireference energy density functional calculations NUCLEAR STRUCTURE 40,48Ca, 56Ni, 100,132Sn, 208Pb; calculated binding energy, charge radii. 24Mg, 74Kr, 80,100Zr, 186Pb; calculated potential energy curves versus β2. 240Pu; calculated fission barrier versus β2. 194Hg; calculated dynamical moment of inertia of superdeformed band. 249Bk, 251Cf; calculated one-quasiparticle levels. Z=20, A=36-52; Z=28, A=54-72; Z=50, A=100-134; Z=82, A=180-214; N=20, Z=10-22; N=50, Z=30-50; N=82, Z=48-70; N=126, Z=80-92; calculated binding energies, charge radii for even-even nuclei. Energy density functional calculations for spherical and deformed nuclei with new Skyrme parametrization with integer powers of the density. Comparison with experimental data.
doi: 10.1103/PhysRevC.86.054309
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
2009DE11 Phys.Rev. C 79, 034305 (2009) S.De Baerdemacker, K.Heyde, V.Hellemans Spectral properties of a tractable collective Hamiltonian
doi: 10.1103/PhysRevC.79.034305
2009HE04 Nucl.Phys. A819, 11 (2009) V.Hellemans, P.Van Isacker, S.De Baerdemacker, K.Heyde Criticality in the configuration-mixed interacting boson model:(2) Q^(x1)Q^(x1)-Q^(x2)Q^(x2) mixing
doi: 10.1016/j.nuclphysa.2009.01.002
2008HE06 Phys.Rev. C 77, 064324 (2008) V.Hellemans, S.De Baerdemacker, K.Heyde Configuration mixing in the neutron-deficient 186-196Pb isotopes NUCLEAR STRUCTURE 188,190,192,194,196Pb; calculated levels, J, π, B(E2), weights of the IBM wave function, quadrupole deformations, mixing strengths between 0p-0h, 2p-2h, 4p-4h levels. Comparison with experimental data.
doi: 10.1103/PhysRevC.77.064324
2007DE09 Phys.Rev.Lett. 98, 112502 (2007) H.De Witte, A.N.Andreyev, N.Barre, M.Bender, T.E.Cocolios, S.Dean, D.Fedorov, V.N.Fedoseyev, L.M.Fraile, S.Franchoo, V.Hellemans, P.H.Heenen, K.Heyde, G.Huber, M.Huyse, H.Jeppesen, U.Koster, P.Kunze, S.R.Lesher, B.A.Marsh, I.Mukha, B.Roussiere, J.Sauvage, M.Seliverstov, I.Stefanescu, E.Tengborn, K.Van de Vel, J.Van de Walle, P.Van Duppen, Yu.Volkov Nuclear Charge Radii of Neutron-Deficient Lead Isotopes Beyond N = 104 Midshell Investigated by In-Source Laser Spectroscopy ATOMIC PHYSICS 182,183,183m,184,185,185m,186,187,187m,188,189,189m,190Pb; measured isotope shifts; deduced charge radii.
doi: 10.1103/PhysRevLett.98.112502
2007HE21 Acta Phys.Pol. B38, 1599 (2007) V.Hellemans, P.Van Isacker, S.De Baerdemacker, K.Heyde Phase Transitions in the Configuration Mixed Interacting Boson Model: U(5)-O(6) Mixing
2007HE27 Nucl.Phys. A789, 164 (2007), Erratum Nucl.Phys. A801, 80 (2008) V.Hellemans, P.Van Isacker, S.De Baerdemacker, K.Heyde Criticality in the configuration-mixed interacting boson model:(1) U(5)-Q(X) Q(X) mixing
doi: 10.1016/j.nuclphysa.2007.12.003
2007PA05 Phys.Rev. C 75, 014302 (2007) J.Pakarinen, V.Hellemans, R.Julin, S.Juutinen, K.Heyde, P.-H.Heenen, M.Bender, I.G.Darby, S.Eeckhaudt, T.Enqvist, T.Grahn, P.T.Greenlees, F.Johnston-Theasby, P.Jones, H.Kettunen, M.Leino, A.-P.Leppanen, P.Nieminen, M.Nyman, R.D.Page, P.M.Raddon, P.Rahkila, C.Scholey, J.Uusitalo, R.Wadsworth Investigation of nuclear collectivity in the neutron mid-shell nucleus 186Pb NUCLEAR REACTIONS 106Pd(83Kr, 3n), E=355 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 186Pb deduced levels, J, π, rotational and vibrational bands, deformation. Recoil-decay tagging, interacting boson model and mean-field model calculations.
doi: 10.1103/PhysRevC.75.014302
2006DE13 Nucl.Phys. A769, 16 (2006) S.De Baerdemacker, L.Fortunato, V.Hellemans, K.Heyde Solution of the Bohr Hamiltonian for a periodic potential with minimum at γ=π/6
doi: 10.1016/j.nuclphysa.2006.01.016
2005FO02 Acta Phys.Pol. B36, 1351 (2005) R.Fossion, V.Hellemans, S.De Baerdemacker, K.Heyde Shape coexistence in the lead isotopes using algebraic models: description of spectroscopic and ground-state related properties NUCLEAR STRUCTURE 186,188,190,192,194,196Pb; calculated levels, J, π, two-neutron separation energies. Interacting boson model, three-configuration mixing.
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
2005HE09 Phys.Rev. C 71, 034308 (2005) V.Hellemans, R.Fossion, S.De Baerdemacker, K.Heyde Configuration mixing in 188Pb: Band structure and electromagnetic properties NUCLEAR STRUCTURE 188Pb; calculated rotational bands level energies, J, π, B(E2), monopole transition strengths, quadrupole moments, deformation, configuration mixing features. Interacting boson model, collective rotational model, comparisons with data.
doi: 10.1103/PhysRevC.71.034308
2005PA42 Phys.Rev. C 72, 011304 (2005) J.Pakarinen, I.G.Darby, S.Eeckhaudt, T.Enqvist, T.Grahn, P.T.Greenlees, V.Hellemans, K.Heyde, F.Johnston-Theasby, P.Jones, R.Julin, S.Juutinen, H.Kettunen, M.Leino, A.-P.Leppanen, P.Nieminen, M.Nyman, R.D.Page, P.M.Raddon, P.Rahkila, C.Scholey, J.Uusitalo, R.Wadsworth Evidence for oblate structure in 186Pb NUCLEAR REACTIONS 106Pd(83Kr, 3n), E=355 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 186Pb deduced levels, J, π, oblate deformation. Jurogam array, recoil-decay tagging, interacting boson model calculations.
doi: 10.1103/PhysRevC.72.011304
2004HE12 Phys.Rev. C 69, 054304 (2004) K.Heyde, J.Jolie, R.Fossion, S.De Baerdemacker, V.Hellemans Phase transitions versus shape coexistence NUCLEAR STRUCTURE 110Ru, 114Cd, 118Te, 122Ba, 182,184,186,188,190,192,194,196,198,200,202,204,206Pb; analyzed levels, J, π, B(E2), phase transition and shape coexistence features.
doi: 10.1103/PhysRevC.69.054304
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