NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = A.Repko Found 19 matches. 2024NE01 Eur.Phys.J. A 60, 28 (2024) V.O.Nesterenko, P.I.Vishnevskiy, P.-G.Reinhard, A.Repko, J.Kvasil Microscopic analysis of dipole electric and magnetic strengths in 156Gd NUCLEAR STRUCTURE 156Gd; calculated deformation parameters, proton and neutron pairing gaps, QRPA E1 photoabsorption and M1 SFGR strengths within a fully self-consistent Quasiparticle Random Phase Approximation (QRPA) with Skyrme forces SVbas, SLy6 and SG2; deduced the effect of the central exchange term from the Skyrme functional. Comparison with available data.
doi: 10.1140/epja/s10050-024-01251-4
2022BA04 Phys.Rev. C 105, 024311 (2022) A.Bahini, V.O.Nesterenko, I.T.Usman, P.von Neumann-Cosel, R.Neveling, J.Carter, J.Kvasil, A.Repko, P.Adsley, N.Botha, J.W.Brummer, L.M.Donaldson, S.Jongile, T.C.Khumalo, M.B.Latif, K.C.W.Li, P.Z.Mabika, P.T.Molema, C.S.Moodley, S.D.Olorunfunmi, P.Papka, L.Pellegri, B.Rebeiro, E.Sideras-Haddad, F.D.Smit, S.Triambak, J.J.van Zyl Isoscalar giant monopole resonance in 24Mg and 28Si: Effect of coupling between the isoscalar monopole and quadrupole strength NUCLEAR REACTIONS 24Mg, 28Si(α, α'), E=196 MeV; measured Eα, Iα, angular distributions; deduced σ(θ). 24Mg, 28Si; deduced isoscalar monopole (IS0) strength distribution, coupling between IS0 and isoscalar quadrupole (IS2) strength. Multipole decomposition and DWBA analysis. Comparison with QRPA calculations and with previous experimental data. K600 magnetic spectrometer at iThemba LABS.
doi: 10.1103/PhysRevC.105.024311
2022NE13 Phys.Atomic Nuclei 85, 858 (2022) V.O.Nesterenko, P.I.Vishnevskiy, A.Repko, J.Kvasil Low-Energy M1 States in Deformed Nuclei: Spin Scissors or Spin-Flip? NUCLEAR STRUCTURE 164Dy, 58Ni; calculated low-energy M1 states in the framework of fully self-consistent Quasiparticle Random-Phase Approximation (QRPA) with various Skyrme forces; deduced the low-energy spin-scissors M1 resonance suggested within Wigner Function Moments (WFM) approach, possible relation of this resonance
doi: 10.1134/S1063778823010404
2021NE04 Phys.Rev. C 103, 064313 (2021) V.O.Nesterenko, P.I.Vishnevskiy, J.Kvasil, A.Repko, W.Kleinig Microscopic analysis of low-energy spin and orbital magnetic dipole excitations in deformed nuclei NUCLEAR STRUCTURE 160,162,164Dy, 232Th; calculated energies of the first 2+ states, proton and neutron pairing gaps, parameter β of the equilibrium axial quadrupole deformation, B(M1) and B(E2) strengths, orbital, spin, and total M1 strengths at spin-scissors resonance (SSR) and ordinary orbital scissors resonance (OSR) energy ranges, M1 spin-flip giant resonances; deduced that deformation not the principle origin of the low-energy spin M1 states but only a factor affecting their features. Fully self-consistent Skyrme quasiparticle random phase approximation (QRPA) method using SkM*, SVbas, and SG2 Skyrme forces, within the Wigner function moments (WFM) approach. Comparison with experimental data.
doi: 10.1103/PhysRevC.103.064313
2019AB13 Acta Phys.Pol. B50, 555 (2019) M.Abolghasem, P.Alexa, A.Repko, P.-G.Reinhard Evolution of Nuclear Shapes and Structure in Tellurium, Xenon, Barium and Cerium Isotopes NUCLEAR STRUCTURE 134,136,138,140,142,144,146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178Te, 136,138,140,142,144,146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180Xe, 138,140,142,144,146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180,182Ba, 140,142,144,146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184Ce; calculated quadrupole β2, octupole β3 and hexadecapole β4 deformation parameters, level energies. Hartree-Fock+BCS and Skyrme QRPA calculations. Comparison to experimental results.
doi: 10.5506/aphyspolb.50.555
2019KV01 Eur.Phys.J. A 55, 213 (2019) J.Kvasil, A.Repko, V.O.Nesterenko NUCLEAR STRUCTURE 154Sm; calculated QRPA strength function for E10(T=0) transitions with poluted strength and using Spuriosity Elimination Before RPA (SEBRPA) procedure, also strength functions for E1μ transitions, isoscalar and icovector QRPA strength functions for compression E1μ transitions and for toroidal E1μ transitions.
doi: 10.1140/epja/i2019-12898-7
2019NE07 Phys.Rev. C 100, 064302 (2019) V.O.Nesterenko, A.Repko, J.Kvasil, P.-G.Reinhard Individual dipole toroidal states: Main features and search in the (e, e') reaction NUCLEAR REACTIONS 24Mg(e, e'), qeffective<3 fm-1; calculated B(E1), B(M2), B(E3), transversal form factors, cross sections for toroidal and compressional states (TS and CS) and the giant-dipole resonance (GDR) using quasiparticle random-phase approximation (QRPA) with Skyrme forces. Comparison with available experimental data.
doi: 10.1103/PhysRevC.100.064302
2019RE02 Phys.Rev. C 99, 044307 (2019) A.Repko, J.Kvasil, V.O.Nesterenko Elimination of spurious modes within quasiparticle random-phase approximation NUCLEAR STRUCTURE 154Sm; calculated isoscalar and isovector E0, E1, E2, and M1 strength functions with and without elimination of spurious admixtures (SA) using the quasiparticle random-phase approximation (QRPA) with SLy6 parametrization. Comparison with experimental values and other theoretical predictions. Proposed a general method for elimination of spurious admixture (SA) from RPA/QRPA intrinsic nuclear excitations. NUCLEAR REACTIONS 154Sm(γ, X), E=0-40 MeV; calculated photoabsorption σ(E) using QRPA approach with Skyrme forces, and compared with experimental data.
doi: 10.1103/PhysRevC.99.044307
2019RE10 Eur.Phys.J. A 55, 242 (2019) A.Repko, V.O.Nesterenko, J.Kvasil, P.-G.Reinhard Systematics of toroidal dipole modes in Ca, Ni, Zr, and Sn isotopes
doi: 10.1140/epja/i2019-12770-x
2018NE05 Phys.Rev.Lett. 120, 182501 (2018) V.O.Nesterenko, A.Repko, J.Kvasil, P.-G.Reinhard Individual Low-Energy Toroidal Dipole State in 24Mg NUCLEAR STRUCTURE 24Mg; calculated toroidal and compression B(E1), QRPA densities, low-energy dipole excitations within the Skyrme quasiparticle random phase approximation for axial nuclei. Comparison with available data.
doi: 10.1103/PhysRevLett.120.182501
2017RE11 Eur.Phys.J. A 53, 221 (2017) A.Repko, J.Kvasil, V.O.Nesterenko, P.-G.Reinhard Pairing and deformation effects in nuclear excitation spectra NUCLEAR STRUCTURE 152,154,156Sm; calculated γ-vibrational states energy, J, π, B(E2), QRPA transitional densities, deformation, photoabsorption σ vs E, compression isoscalar γ E1 strength (ISGDR) using QRPA with mean field treated within HF+BCS. Compared with available data.
doi: 10.1140/epja/i2017-12406-3
2016KV01 Phys.Rev. C 94, 064302 (2016) J.Kvasil, V.O.Nesterenko, A.Repko, W.Kleinig, P.-G.Reinhard Deformation-induced splitting of the isoscalar E0 giant resonance: Skyrme random-phase-approximation analysis NUCLEAR STRUCTURE 142,146,150Nd, 154Sm, 106,108,110,112,114,116Cd, 164Dy, 168Er, 172Yb, 238U, 242,254,270No, 264,284,304Fl; calculated strengths and other features of isoscalar giant monopole resonance (ISGMR) in deformed nuclei using Skyrme quasiparticle random-phase approximation (QRPA). Systematics for medium, rare-earth, actinide and superheavy nuclides. Comparison with available experimental data.
doi: 10.1103/PhysRevC.94.064302
2016NE06 Phys.Rev. C 93, 034301 (2016) V.O.Nesterenko, V.G.Kartavenko, W.Kleinig, J.Kvasil, A.Repko, R.V.Jolos, P.-G.Reinhard Skyrme random-phase-approximation description of lowest Kπ = 2+γ states in axially deformed nuclei NUCLEAR STRUCTURE 150,152Nd, 152,154,156Sm, 154,156,158,160Gd, 158,160,162,164,166Dy, 162,164,166,168,170Er, 168,170,172,174,176Yb, 168,170,172,174,176,178,180Hf, 178,180,182,184,186W, 232,234,236,238U; calculated energies and B(E2) of the lowest quadrupole γ-vibrational Kπ=2+ states in axially deformed rare-earth and uranium even-even nuclei. 152Nd, 164Dy, 172Yb, 238U; calculated isoscalar strength function for the ISGQR. Separable random-phase-approximation (SRPA) method based on the Skyrme functional with the Skyrme forces SV-bas and SkM*, and corrected by using pairing blocking effect. Comparison with experimental data.
doi: 10.1103/PhysRevC.93.034301
2016PA04 Phys.Rev. C 93, 014318 (2016) H.Pai, T.Beck, J.Beller, R.Beyer, M.Bhike, V.Derya, U.Gayer, J.Isaak, Krishichayan, J.Kvasil, B.Loher, V.O.Nesterenko, N.Pietralla, G.Martinez-Pinedo, L.Mertes, V.Yu.Ponomarev, P.-G.Reinhard, A.Repko, P.C.Ries, C.Romig, D.Savran, R.Schwengner, W.Tornow, V.Werner, J.Wilhelmy, A.Zilges, M.Zweidinger Magnetic dipole excitations of 50Cr NUCLEAR REACTIONS 50Cr(γ, γ'), (polarized γ, γ'), E<9.7 MeV bremsstrahlung; measured Eγ, Iγ, γ(θ), γ-polarization asymmetry, integrated σ, γ-branching ratios. Experiments performed at Darmstadt S-DALINAC and TUNL High Intensity γ-ray Source (HIγS) facilities. 50Cr; deduced levels, J, π, B(M1), reduced widths, configurations, M1 spin-flip transition. Discussed isovector rotation-like oscillations of 1+ states versus scissors-type mode. Comparison with Skyrme quasiparticle random-phase-approximation (QRPA) and the large-scale shell model (LSSM) calculations.
doi: 10.1103/PhysRevC.93.014318
2015KV01 Phys.Scr. 90, 114007 (2015) J.Kvasil, D.Bozik, A.Repko, P.-G.Reinhard, V.O.Nesterenko, W.Kleinig Monopole giant resonance in 100-132Sn, 144Sm and 208Pb NUCLEAR STRUCTURE 100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132Sn, 144Sm, 208Pb; calculated giant monopole resonance (GMR) strength functions. Comparison with available data.
doi: 10.1088/0031-8949/90/11/114007
2014RE02 Phys.Rev. C 89, 024321 (2014) P.-G.Reinhard, V.O.Nesterenko, A.Repko, J.Kvasil Nuclear vorticity in isoscalar E1 modes: Skyrme-random-phase approximation analysis NUCLEAR STRUCTURE 208Pb; calculated E1 strength functions, transition densities, E1 current and velocity fields, form factors for isoscalar 1- states in toroidal and compression modes using Skyrme SLy6 random phase approximation (RPA) model; analyzed nuclear vorticity (hydrodynamical and Rawenthall-Wambach).
doi: 10.1103/PhysRevC.89.024321
2013KV01 Phys.Scr. T154, 014019 (2013) J.Kvasil, A.Repko, V.O.Nesterenko, W.Kleinig, P.-G.Reinhard, N.Lo Iudice Toroidal, compression and vortical dipole strengths in 124Sn NUCLEAR STRUCTURE 100,124,132Sn; calculated toroidal, vortical and compression dipole strength functions. Self-consistent separable Skyrme-RPA approach.
doi: 10.1088/0031-8949/2013/T154/014019
2013RE03 Phys.Rev. C 87, 024305 (2013) A.Repko, P.-G.Reinhard, V.O.Nesterenko, J.Kvasil Toroidal nature of the low-energy E1 mode NUCLEAR STRUCTURE 208Pb; calculated isoscalar and isovector low-energy E1 strength function S(E), summed current transition densities (CTD), proton and neutron transition densities (TD) for pygmy dipole resonance (PDR). Toroidal T=0 resonance. Fully self-consistent Skyrme-random-phase approximation (RPA) calculations. Comparison with experimental data.
doi: 10.1103/PhysRevC.87.024305
2012KV01 Int.J.Mod.Phys. E21, 1250041 (2012) J.Kvasil, A.Repko, V.O.Nesterenko, W.Kleinig, P.-G.Reinhard E1 strength in light nuclei: Skyrme RPA analysis NUCLEAR REACTIONS 48Ca, 50Ti, 52Cr, 54Fe(γ, X), E<30 MeV; calculated photoabsorption σ, giant dipole resonance. SRPA approach based on the Skyrme functional, comparison with available data.
doi: 10.1142/S0218301312500413
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