NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = R.Budaca Found 33 matches. 2024BU03 J.Phys.(London) G51, 045102 (2024) Properties of the single-particle spectrum generated by the mixed fractional rotation group NUCLEAR STRUCTURE 40,48Ca, 56Ni, 90Zr, 100,132Sn, 208Pb; analyzed available data; deduced deformation related properties of the single-particle spectrum generated by a fractional rotational group with mixed derivative using in order to ascertain the spectrum's suitability as a viable microscopic model.
doi: 10.1088/1361-6471/ad2470
2024BU04 Nuovo Cim. C 47, 25 (2024) R.Budaca, P.Buganu, A.I.Budaca Axial quadrupole and octupole dynamics in heavy even-even nuclei NUCLEAR STRUCTURE 224,226,228Ra, 224,226,228Th, 232Th, 236U; calculated B(E2) using a quadrupole-octupole axially symmetric collective model; deduced a critical region where a shape phase transition commences between stable and dynamic octupole deformation.
doi: 10.1393/ncc/i2024-24025-0
2023BU12 Eur.Phys.J. A 59, 242 (2023), Pub Erratum Eur.Phys.J. A 59, 261 (2023) R.Budaca, P.Buganu, A.I.Budaca Quadrupole-octupole shape and dynamics of 222Ra NUCLEAR STRUCTURE 222Ra; analyzed available data; deduced parameters for a phenomenological model based on an axial quadrupole–octupole Bohr Hamiltonian, to determine its shape and the nature of the excited band.
doi: 10.1140/epja/s10050-023-01163-9
2023BU13 J.Phys.(London) G50, 125101 (2023) Spin dynamics of triaxial odd mass nuclei with quasiparticle alignments NUCLEAR STRUCTURE 105Pd, 133La, 135Pr; calculated energy surfaces, total angular momentum, wobbling energy as a function of angular momentum, energies of the yrast and excited bands in a semiclassical approach. Comparison with available data.
doi: 10.1088/1361-6471/acfcd0
2022BE06 Phys.Rev. C 105, 034347 (2022) A.A.Ben Mennana, R.Benjedi, R.Budaca, P.Buganu, Y.El Bassem, A.Lahbas, M.Oulne Shape and structure for the low-lying states of the 80Ge nucleus NUCLEAR STRUCTURE 80Ge; calculated levels, J, π, potential energy surfaces in the (β, γ) plane, B(E2), B(E0), bands structure, deformation parameters. Proposed prolate shape for the ground state. Covariant density-functional theory (CDFT) and the Bohr Hamiltonian with sextic potential (BHSP). Comparison to the experimental data.
doi: 10.1103/PhysRevC.105.034347
2022BU01 Nucl.Phys. A1017, 122355 (2022) Deformation dependence of the screened decay law for proton emission RADIOACTIVITY 108,109I, 112,113Cs, 117La, 121Pr, 130,131Eu, 135Tb, 141Ho, 145,146,147Tm, 150,151Lu, 155,156,157Ta, 159,160,161Re, 166,167Ir, 170,171Au, 176,177Tl, 185Bi(p); calculated T1/2. Comparison with available data.
doi: 10.1016/j.nuclphysa.2021.122355
2022BU17 Phys.Rev. C 106, 014311 (2022) R.Budaca, P.Buganu, A.I.Budaca Nuclear collective motion of heavy nuclei with axial quadrupole and octupole deformation NUCLEAR STRUCTURE 224,226,228Ra, 224,226,228,230,232,234Th, 230,232,234,236,238,240U, 236,238,240Pu; calculated energy levels, J, π, B(E1), B(E2), B(E3), related features of the alternate parity bands corresponding to octupole vibration or a stable deformation. Axially symmetric quadrupole-octupole Bohr model. Comparison with experimental data.
doi: 10.1103/PhysRevC.106.014311
2022BU18 Phys.Rev. C 106, 014313 (2022) Beyond the harmonic approximation description of wobbling excitations in even-even nuclei with frozen alignments NUCLEAR STRUCTURE 130Ba, 134Ce, 136,138Nd; calculated energy levels, J, π, B(E2), B(M1), E2/M1 mixing ratios, wobbling motion in even-even nuclei, and related features of the two-quasiparticle bands using a semiclassical approach for the triaxial particle-rotor model. Comparison with experimental data.
doi: 10.1103/PhysRevC.106.014313
2022LV02 Phys.Rev. C 105, 034302 (2022) B.F.Lv, C.M.Petrache, R.Budaca, A.Astier, K.K.Zheng, P.Greenlees, H.Badran, T.Calverley, D.M.Cox, T.Grahn, J.Hilton, R.Julin, S.Juutinen, J.Konki, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, B.Cederwall, A.Ertoprak, H.Liu, S.Guo, J.G.Wang, H.J.Ong, X.H.Zhou, Z.Y.Sun, I.Kuti, J.Timar, A.Tucholski, J.Srebrny, C.Andreoiu Experimental evidence for transverse wobbling bands in 136Nd NUCLEAR REACTIONS 100Mo(40Ar, 4n)136Nd, E=152 MeV; analyzed γ-ray measurements reported in their previous articles: 2018Pe07, 2018Lv01, 2019Pe21 and 2020Pe07 (Phys. Rev. C 97, 041304(R); ibid 98, 044304; 100, 054319; 102, 014311). 136Nd; deduced levels, J, π, γ-ray asymmetry ratios for 751- and 781-keV γ rays, linear polarization for 751-keV γ ray, multipolarity, B(M1)/B(E2) and B(E2)/B(E2) ratios, transverse one-phonon and zero-phonon wobbling-mode bands, and configurations. Comparison with theoretical calculations using a new particle-rotor model coupling the total angular momentum of two quasiparticles to a triaxial core in an orthogonal geometry.
doi: 10.1103/PhysRevC.105.034302
2021AI02 Phys.Scr. 96, 125306 (2021) A.Ait Ben Mennana, R.Benjedi, R.Budaca, P.Buganu, Y.El Bassem, A.Lahbas, M.Oulne Mixing of the coexisting shapes in the ground states of 74Ge and 74Kr NUCLEAR STRUCTURE 74Ge, 74Kr; analyzed available data; deduced ground state shape coexistence within the phenomenological Bohr-Mottelson model, having as input the experimental collective energy states, as well with Covariant Density Functional Theory based on microscopic structural information.
doi: 10.1088/1402-4896/ac2082
2021BU05 Phys.Rev. C 103, 044312 (2021) Reconciliation of wobbling motion with rotational alignment in odd mass nuclei NUCLEAR STRUCTURE 161,163,165,167Lu, 167Ta, 135Pr, 105Pd, 183Au; calculated triaxiality, moment of inertia and inertial parameters, one phonon and two phonon wobbling excitation energies, B(E2)(out)/B(E2)(in) ratios, B(M1), B(M1)/B(E2) ratios. Semiclassical treatment for a triaxial rotor Hamiltonian with an additional spin-spin interaction for the rotational alignment mechanism to generalize the quasiparticle-rotor coupling for describing transverse wobbling motion in odd-A nuclei. Comparison with experimental data.
doi: 10.1103/PhysRevC.103.044312
2020BU05 Phys.Rev. C 101, 064318 (2020) Triaxiality and state-dependent shape properties of Xe isotopes NUCLEAR STRUCTURE 118,120,122,124,126,128Xe; calculated levels, J, π of ground-state band, γ and β bands, staggering parameter, three-phonon 0+ states, B(E2) for intra- and inter-band quadrupole transitions, potential energy surfaces (PES) in (β2, γ) plane, β2 deformation for ground states, effective potentials for β2 deformations. Phenomenological Bohr model with an exactly separable collective potential. Comparison with experimental data.
doi: 10.1103/PhysRevC.101.064318
2020BU17 Chin.Phys.C 44, 124102 (2020) Alpha decay of heavy and super heavy nuclei with a generalized electrostatic potential RADIOACTIVITY 186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219Po, 191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219At, 194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222Rn, 200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222Fr, 202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226Ra, 202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227Ac, 208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232Th, 216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238U(α); calculated T1/2 using WKB theory applied for a phenomenological potential barrier composed of a centrifugal contribution and a screened electrostatic interaction represented by a Hulthen potential. Comparison with available data.
doi: 10.1088/1674-1137/abb4cf
2019BU16 Nucl.Phys. A990, 137 (2019) R.Budaca, P.Buganu, A.I.Budaca Geometrical model description of shape coexistence in Se isotopes
doi: 10.1016/j.nuclphysa.2019.07.006
2019BU22 Phys.Rev. C 100, 049801 (2019) Comment on "Elimination of degeneracy in the γ-unstable Bohr Hamiltonian in the presence of an extended sextic potential"
doi: 10.1103/PhysRevC.100.049801
2019BU27 J.Phys.(London) G46, 125102 (2019) R.Budaca, A.I.Budaca, P.Buganu Application of the Bohr Hamiltonian with a double-well sextic potential to collective states in Mo isotopes NUCLEAR STRUCTURE 96,98,100Mo; calculated B(Eλ), energy levels, J, π; deduced collective potentials. Comparison with available data.
doi: 10.1088/1361-6471/ab4498
2018BU03 Phys.Rev. C 97, 024302 (2018) Tilted-axis wobbling in odd-mass nuclei NUCLEAR STRUCTURE 135Pr; calculated levels, J, π of wobbling bands, B(E2)/B(E2) and B(M1)/B(E2) ratios for transitions between the yrast band and wobbling band. Dynamical description of a system composed of a triaxial core and an aligned quasiparticle using time-dependent variational principle, with angular momentum coherent states. Comparison with experimental values.
doi: 10.1103/PhysRevC.97.024302
2018BU11 Phys.Rev. C 98, 014303 (2018) Semiclassical description of chiral geometry in triaxial nuclei NUCLEAR STRUCTURE 134Pr; calculated energy surface contours, lowest two eigenvalues of the chiral potential for spins of 8-16, density probability distribution as function of total angular momentum and chiral variable, yrast and non-yrast energy levels, J, π, chiral partner bands, and B(E2). Triaxial particle-rotor Hamiltonian for three mutually perpendicular angular momentum vectors. Comparison with experimental data.
doi: 10.1103/PhysRevC.98.014303
2017BU11 Phys.Scr. 92, 084001 (2017) Energy-dependent collective excitations in Os and Pt isotopes NUCLEAR STRUCTURE 172,174,176,178,180,182,184,186,188,190,192Os, 180,182,184,186,188,190,192,194,196Pt; calculated B(E2), energy ratios and the excited band heads. Comparison with available data.
doi: 10.1088/1402-4896/aa6dab
2017BU14 Eur.Phys.J. A 53, 160 (2017) Proton emission with a screened electrostatic barrier RADIOACTIVITY 105Sb, 109I, 112,113Cs, 130,131Eu, 135Tb, 140,141Ho, 145,146,147Tm, 150,151Lu, 156,157Ta, 159,160,161Re, 164,165,166,167Ir, 170,171Au, 176,177Tl, 185Bi(p); calculated T1/2 using WKB-based with centrifugal and overlapping effects in addition to electrostatic repulsion. Compared with data and with other calculations.
doi: 10.1140/epja/i2017-12352-0
2016BU11 Nucl.Phys. A951, 60 (2016) A.I.Budaca, R.Budaca, I.Silisteanu Extended systematics of alpha decay half lives for exotic superheavy nuclei COMPILATION Z=102-118(α); compiled T1/2; deduced Q, T1/2 systematics. Compared to data.
doi: 10.1016/j.nuclphysa.2016.03.048
2016BU25 Phys.Rev. C 94, 054306 (2016) Shape phase mixing in critical point nuclei NUCLEAR STRUCTURE 148Ce, 150Nd, 156Dy, 158Er, 174,176,178,180Os, 178,180,182,184Pt; calculated energy levels for the ground, γ, and the first two β bands, J, π, B(E2), ground state deformation parameters using Bohr-Mottelson model. Comparisons with experimental values taken from evaluated data in NDS publications.
doi: 10.1103/PhysRevC.94.054306
2016BU26 Eur.Phys.J. A 52, 314 (2016) Bohr Hamiltonian with an energy-dependent γ-unstable Coulomb-like potential NUCLEAR STRUCTURE 72,74Se, 72Kr, 98,100Mo; calculated low-lying states energy, B(E2), deformation using exact analytical solution for the Bohr Hamiltonian with an energy-dependent Coulomb-like ?-unstable potential. Compared with data.
doi: 10.1140/epja/i2016-16314-8
2015BU03 Phys.Rev. C 91, 014306 (2015) Analytical solution for the Davydov-Chaban Hamiltonian with a sextic potential for γ = 30 degrees NUCLEAR STRUCTURE 128,130,132Xe, 192,194,196Pt; calculated levels, J, π, B(E2) for ground-, β- and γ-band members using Davydov-Chaban Hamiltonian, with Z(4)-sextic oscillator potential for the variable β and γ frozen to 30°. Comparison with experimental data.
doi: 10.1103/PhysRevC.91.014306
2015BU09 J.Phys.(London) G42, 085103 (2015) Conjunction of γ-rigid and γ-stable collective motions in the critical point of the phase transition from spherical to deformed nuclear shapes NUCLEAR STRUCTURE 160Gd, 162Dy, 166Er; calculated energy levels, J, π, B(E2). Comparison with available data.
doi: 10.1088/0954-3899/42/8/085103
2015BU11 J.Phys.(London) G42, 105106 (2015) Sextic potential for γ-rigid prolate nuclei NUCLEAR STRUCTURE 98,100,102,104,106,108Ru, 100,102Mo, 116,118,120,122,124,126,128,130Xe, 132,134Ce, 146,148,150Nd, 150,152Sm, 152,154Gd, 154,156Dy, 172Os, 180,182,184,186,188,190,192,194,196Pt, 190Hg, 222Ra; calculated rms radii, B(E2), parameters. The equation of the Bohr-Mottelson Hamiltonian, comparison with experimental data.
doi: 10.1088/0954-3899/42/10/105106
2015BU12 Eur.Phys.J. A 51, 126 (2015) Competing γ-rigid and γ-stable vibrations in neutron-rich Gd and Dy isotopes NUCLEAR STRUCTURE 158,160,162Gd, 160,162,164Dy; calculated levels, J, π, deformation, rotational bands, B(E2), coupling between two types of collective motion, rigidity parameter using exactly separable version of Bohr Hamiltonian. Compared with data.
doi: 10.1140/epja/i2015-15126-8
2015BU16 Phys.Lett. B 751, 39 (2015) Spherical vibrator model with an energy increasing stiffness NUCLEAR STRUCTURE 116Cd; calculated energy levels, J, π, B(E2) by considering a fast stiffening spherical harmonic oscillator potential one attained an exactly solvable collective model associated to a near β-rigid spherical vibrator. Comparison with available data.
doi: 10.1016/j.physletb.2015.10.023
2014BU04 Eur.Phys.J. A 50, 87 (2014) Quartic oscillator potential in the γ-rigid regime of the collective geometrical model NUCLEAR STRUCTURE 100Mo, 100Pd, 118Te, 130Xe, 148Sm, 152Gd, 154Dy, 154Er, 220Th; calculated energy levels, J, π, β bands, deformation using prolate γ-rigid Bohr-Mottelson hamiltonian with anharmonic oscillator.Compared to data.
doi: 10.1140/epja/i2014-14087-8
2013BU01 J.Phys.(London) G40, 025109 (2013) Semi-microscopic description of the double backbending in some deformed even-even rare earth nuclei NUCLEAR STRUCTURE 156,158Er, 160Yb, 162Hf; calculated neutron and proton Fermi energy levels, gap parameters, and quasiparticle energies, single-particle energy levels, J, π, deformation parameters, backbending. Semi-microscopic model, comparison with available data.
doi: 10.1088/0954-3899/40/2/025109
2011RA35 Phys.Rev. C 84, 044323 (2011), Erratum Phys.Rev. C 87, 029901 (2013) Semimicroscopic description of backbending phenomena in some deformed even-even nuclei NUCLEAR STRUCTURE 160Er; calculated neutron energies, 156Dy, 160Yb, 158,160Er, 164,166Hf; calculated pairing strength, quadrupole-quadrupole interactions, spin-spin interactions, Fermi level energies, gap parameters, quasiparticle energies, backbending plots, g factor. Semiphenomenological investigation based on hybridization of two rotational bands, model Hamiltonian of subsystems. Comparison with experimental data.
doi: 10.1103/PhysRevC.84.044323
2010RA10 J.Phys.(London) G37, 085108 (2010) A.A.Raduta, R.Budaca, A.Faessler Closed formulas for ground band energies of nuclei with various symmetries NUCLEAR STRUCTURE 104Ru, 102Pd, 108Te, 150,154,156Nd, 150,152,156,158Sm, 152,154,160,162Gd, 154,156,162,164Dy, 166Er, 172,174Yb, 176Hf, 170,182,186W, 174,178,180,186Os, 176,178,180Pt, 228,232Th, 232,234,236,238U, 236,238,240,242Pu, 248Cm; calculated level energies, J, π; deduced generalized Holmberg-Lipas formula. A time-dependent variational principal.
doi: 10.1088/0954-3899/37/8/085108
2007RA32 Phys.Rev. C 76, 064309 (2007) A.A.Raduta, R.Budaca, C.M.Raduta Semiclassical description of a triaxial rigid rotor NUCLEAR STRUCTURE 158Er; calculated excitation energies using triaxial rotor Hamiltonian, compared with experimental data.
doi: 10.1103/PhysRevC.76.064309
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