NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = S.Drenska Found 28 matches. 2013MI27 Phys.Rev. C 88, 064310 (2013) N.Minkov, S.Drenska, K.Drumev, M.Strecker, H.Lenske, W.Scheid Non-yrast spectra of odd-A nuclei in a model of coherent quadrupole-octupole motion NUCLEAR STRUCTURE 151Pm, 157Gd, 223Ra, 239Np, 243Am; calculated levels, J, π, B(E1), B(E2), non-yrast and yrast quasi-parity-doublet bands. Coherent quadrupole and octupole motion (CQOM) reflection-asymmetric model. discussed role of reflection-asymmetric deformed shell model to describe single-particle motion and Coriolis interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.88.064310
2012MI08 Phys.Rev. C 85, 034306 (2012) N.Minkov, S.Drenska, M.Strecker, W.Scheid, H.Lenske Non-yrast nuclear spectra in a model of coherent quadrupole-octupole motion NUCLEAR STRUCTURE 152,154Sm, 154,156,158Gd, 236U, 100Mo; calculated levels, J, π, yrast and non-yrast sequences with alternating parity, B(E1), B(E2), B(E3), density distribution contours, Coherent quadrupole-octupole vibrations and rotations model (CQOM). Comparison with experimental data.
doi: 10.1103/PhysRevC.85.034306
2012MI12 Int.J.Mod.Phys. E21, 1250021 (2012) N.Minkov, S.Drenska, M.Strecker, W.Scheid Nuclear alternating-parity bands and transition rates in a model of coherent quadrupole-octupole motion NUCLEAR STRUCTURE 154Sm, 156Gd, 100Mo; calculated energy levels, J, π, B(E1), B(E2), B(E3). Comparison with experimental data.
doi: 10.1142/S0218301312500218
2011MI04 Int.J.Mod.Phys. E20, 228 (2011) N.Minkov, S.Drenska, M.Strecker, W.Scheid Parity effects in nuclear collective and single particle motion NUCLEAR STRUCTURE 219,225Ra, 225Th, 241Cm; calculated energies, J, π, deformation parameters; deduced the connection between parity-mixed single-particle state and the structure of the collective spectrum.
doi: 10.1142/S0218301311017569
2010GE06 Physics of Part.and Nuclei 41, 1105 (2010) A.I.Georgieva, M.I.Ivanov, S.L.Drenska, K.D.Sviratcheva, J.P.Draayer Dynamical symmetries in contemporary nuclear structure applications NUCLEAR STRUCTURE 40,42,44,46,48Ca, 42,44,46,48Sc, 44,46,48Ti, 46,48V, 48Cr; analyzed nuclear properties; deduced classification scheme. Group theory.
doi: 10.1134/S1063779610070270
2010MI29 J.Phys.:Conf.Ser. 205, 012009 (2010) N.Minkov, S.Drenska, M.Strecker, W.Scheid Parity mixing in the single particle states of quadrupole-octupole deformed nuclei NUCLEAR STRUCTURE 237U, 249Cm; calculated single-particle states vs deformation, potential surfaces.
doi: 10.1088/1742-6596/205/1/012009
2009MI02 J.Phys.(London) G36, 025108 (2009) N.Minkov, S.Drenska, M.Strecker, W.Scheid Coriolis interaction in quadrupole-octupole deformed nuclei NUCLEAR STRUCTURE 219,221Fr, 219,223,225,233Ra, 219Ac, 225,227Th, 237U, 239Pu, 241,249Cm, 251Cf; calculated Coriolis decoupling factors as functions of deformation parameters.
doi: 10.1088/0954-3899/36/2/025108
2007MI30 Phys.Atomic Nuclei 70, 1470 (2007) N.Minkov, S.B.Drenska, P.Yotov, D.Bonatsos, W.Scheid Collective states of odd nuclei in a model with quadrupole-octupole degrees of freedom NUCLEAR STRUCTURE 219,221,223,225Fr, 223,225Th; calculated level energies of positive and negative parity bands using the collective axial quadrupole-octupole Hamiltonian.
doi: 10.1134/S1063778807080248
2007MI33 Phys.Rev. C 76, 034324 (2007) N.Minkov, S.Drenska, P.Yotov, S.Lalkovski, D.Bonatsos, W.Scheid Coherent quadrupole-octupole modes and split parity-doublet spectra in odd-A nuclei NUCLEAR STRUCTURE Nd, Pm, Sm, eu, Gd, Tb, Dy, Ho, Fr, Ra, Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk; calculated level energies, parity doublet splittings, B(E1), B(E2) using a collective model. Compared results to available data.calculated energies.
doi: 10.1103/PhysRevC.76.034324
2006MI05 J.Phys.(London) G32, 497 (2006) N.Minkov, P.Yotov, S.Drenska, W.Scheid Parity shift and beat staggering structure of octupole bands in a collective model for quadrupole-octupole-deformed nuclei NUCLEAR STRUCTURE 224,226Ra, 224,226Th; calculated octupole rotational bands energy levels. Collective model formalism, comparison with data.
doi: 10.1088/0954-3899/32/4/008
2006MI11 Phys.Rev. C 73, 044315 (2006) N.Minkov, P.Yotov, S.Drenska, W.Scheid, D.Bonatsos, D.Lenis, D.Petrellis Nuclear collective motion with a coherent coupling interaction between quadrupole and octupole modes NUCLEAR STRUCTURE 150Nd, 152Sm, 154Gd, 156Dy; calculated energy vs spin, transition probabilities for alternating-parity rotational bands, coupling of quadrupole and octupole degrees of freedom.
doi: 10.1103/PhysRevC.73.044315
2004MI41 Yad.Fiz. 67, 1787 (2004); Phys.Atomic Nuclei 67, 1760 (2004) N.Minkov, S.B.Drenska, P.Yotov, W.Scheid Complex Shape Effects in Nuclear Rotational Spectra NUCLEAR STRUCTURE 224,226Ra, 224,226Th; calculated alternating-parity rotational bands energies, collectivity modes. Quadrupole-octupole rotational model.
doi: 10.1134/1.1806920
2002DR04 Phys.Rev. C65, 054303 (2002) S.Drenska, A.Georgieva, N.Minkov Staggering Behavior of the Low-Lying Excited States of Even-Even Nuclei in a Sp(4, R) Classification Scheme NUCLEAR STRUCTURE Z=50-82; analyzed level energies, staggering behavior; deduced mechanisms, classification scheme.
doi: 10.1103/PhysRevC.65.054303
2002DR10 Prog.Theor.Phys.(Kyoto), Suppl. 146, 555 (2002) S.Drenska, A.Georgieva, N.Minkov Staggering Behavior of the First Excited 2+ States of Even-Even Nuclei in a Sp(4, R) Classification Scheme
doi: 10.1143/PTPS.146.555
2002MI50 Prog.Theor.Phys.(Kyoto), Suppl. 146, 597 (2002) Quadrupole-Octupole Collectivity and Fine Structure of Nuclear Rotational Spectra NUCLEAR STRUCTURE 164Er, 226Ra; calculated rotational bands energy staggering, role of quadrupole-octupole interaction.
doi: 10.1143/PTPS.146.597
2001MI10 Phys.Rev. C63, 044305 (2001) N.Minkov, S.B.Drenska, P.P.Raychev, R.P.Roussev, D.Bonatsos ' Beat ' Patterns for the Odd-Even Staggering in Octupole Bands from a Quadrupole-Octupole Hamiltonian
doi: 10.1103/PhysRevC.63.044305
2001MI26 Yad.Fiz. 64, No 6, 1173 (2001); Phys.Atomic Nuclei 64, 1098 (2001) N.Minkov, S.B.Drenska, P.P.Raychev, R.P.Roussev, D.Bonatsos Rotations of Nuclei with Reflection Asymmetry Correlations
doi: 10.1134/1.1383624
2000BO34 Phys.Rev. C62, 024301 (2000); Erratum Phys.Rev. C63, 049902 (2001) D.Bonatsos, C.Daskaloyannis, S.B.Drenska, N.Karoussos, N.Minkov, P.P.Raychev, R.P.Roussev ΔI = 1 Staggering in Octupole Bands of Light Actinides: ' Beat ' Patterns NUCLEAR STRUCTURE 218,220,222Rn, 218,220,222,224,226Ra, 220,222,224,226,228Th; analyzed octupole bands transition energies; deduced beat patterns, possible mechanisms. Predictions of algebraic models discussed.
doi: 10.1103/PhysRevC.62.024301
2000BO44 Trans.Bulg.Nucl.Soc. 5, 18 (2000) D.Bonatsos, N.Karoussos, C.Daskaloyannis, S.B.Drenska, N.Minkov, P.P.Raychev, R.P.Roussev, J.Maruani Symmetries in Nuclei, Molecules and Atomic Clusters
2000MI18 Phys.Rev. C61, 064301 (2000) N.Minkov, S.B.Drenska, P.P.Raychev, R.P.Roussev, D.Bonatsos Ground-γ Band Mixing and Odd-Even Staggering in Heavy Deformed Nuclei NUCLEAR STRUCTURE 156Gd, 156,160,162Dy, 162,164,166Er, 170Yb, 228,232Th; analyzed vibrational bands odd-even staggering effect, role of band mixing. Vector boson model with SU(3) dynamical symmetry.
doi: 10.1103/PhysRevC.61.064301
2000MI29 Trans.Bulg.Nucl.Soc. 5, 192 (2000) N.Minkov, S.Drenska, P.Raychev, R.Roussev, D.Bonatsos Ground-γ Band Mixing and ΔL = 1 Staggering in Heavy Deformed Nuclei NUCLEAR STRUCTURE 164,166Er; analyzed rotational band level staggering; deduced ground-γ band mixing. Vector boson model.
1999MI23 Phys.Rev. C60, 034305 (1999) N.Minkov, S.B.Drenska, P.P.Raychev, R.P.Roussev, D.Bonatsos Ground-γ Band Coupling in Heavy Deformed Nuclei and SU(3) Contraction Limit NUCLEAR STRUCTURE 152,154Sm, 154,156,158,160Gd, 158,160,162,164Dy, 162,164,166,168,170Er, 168,170,172,174,176Yb, 174,178Hf, 182,184,186W, 230,232Th, 234,238U; analyzed ground, vibrational bands levels, interband, intraband transitions B(E2); deduced band mixing features. Vector-boson model with SU(3) dynamical symmetry.
doi: 10.1103/PhysRevC.60.034305
1997MI10 Phys.Rev. C55, 2345 (1997) N.Minkov, S.B.Drenska, P.P.Raychev, R.P.Roussev, D.Bonatsos Broken SU(3) Symmetry in Deformed Even-Even Nuclei NUCLEAR STRUCTURE 164Dy, 164,166,168Er, 168,172Yb, 176,178Hf, 238U; calculated levels, transition ratios, energy rms factor. Collective vector-boson model.
doi: 10.1103/PhysRevC.55.2345
1996MI19 J.Phys.(London) G22, 1633 (1996) N.Minkov, S.B.Drenska, P.P.Raychev, R.P.Roussev, D.Bonatsos The SU(q)(2) Rotator Model in Excited Collective Bands of Even Deformed Nuclei NUCLEAR STRUCTURE 152,154Sm, 154,156,158,160Gd, 160,162,164Dy, 160,162,164,166,168,170Er, 166,168,170,172Yb, 172,174,176,178,180Hf, 178,180,182,184W, 232Th, 232,234U; analyzed (β)-, (γ)-bands levels, B(λ) data. Rotator SU(q)(2) model.
doi: 10.1088/0954-3899/22/11/010
1995DR06 Phys.Rev. C52, 1853 (1995) S.Drenska, A.Georgieva, V.Gueorguiev, R.Roussev, P.Raychev Unified Description of the Low Lying States of the Ground Bands of Even-Even Nuclei NUCLEAR STRUCTURE A=58-258; 144Nd, 148Sm, 152Gd, 156Dy, 160Er, 164Yb, 168Hf, 172W, 176Os; calculated levels; deduced model parameters. Generalized dynamical symmetry group.
doi: 10.1103/PhysRevC.52.1853
1995DR07 Int.J.Mod.Phys. E4, 123 (1995) S.Drenska, A.Georgieva, M.Ivanov, S.Mavrodiev, R.Roussev, P.Raychev Ground Band Energies of Transitional Nuclei II NUCLEAR STRUCTURE A=56-254; calculated transition nuclei ground band level energies, five major shells. Unified description.
doi: 10.1142/S0218301395000043
1991BO11 J.Phys.(London) G17, L67 (1991) D.Bonatsos, S.B.Drenska, P.P.Raychev, R.P.Roussev, Yu.F.Smirnov Description of Superdeformed Bands by the Quantum Algebra SU(q)(2) NUCLEAR STRUCTURE 134,136Nd, 150Gd, 162,152Dy, 192,194Hg, 174Yb, 248Cm; analyzed level data; deduced superdeformed band features. Quantum SU(q)(2) algebra.
doi: 10.1088/0954-3899/17/5/003
1990BO47 Phys.Lett. 251B, 477 (1990) D.Bonatsos, E.N.Argyres, S.B.Drenska, P.P.Raichev, R.P.Roussev, Yu.F.Smirnov SU(q)(2) Description of Rotational Spectra and Its Relation to the Variable Moment of the Inertia Model NUCLEAR STRUCTURE 176Yb, 178Hf, 232U, 238Pu; calculated levels. SU(q)(2) description.
doi: 10.1016/0370-2693(90)90782-2
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