NSR Query Results
Output year order : Descending NSR database version of April 29, 2024. Search: Author = P.Raichev Found 32 matches. 2004BO02 Phys.Rev. C 69, 014302 (2004) D.Bonatsos, D.Lenis, N.Minkov, P.P.Raychev, P.A.Terziev Sequence of potentials lying between the U(5) and X(5) symmetries NUCLEAR STRUCTURE 148Nd, 160Yb, 158Er; calculated ground and vibrational bands level energies, J, π, B(E2). Harmonic oscillator, X(5) symmetries.
doi: 10.1103/PhysRevC.69.014302
2004BO14 Phys.Rev. C 69, 044316 (2004) D.Bonatsos, D.Lenis, N.Minkov, P.P.Raychev, P.A.Terziev Sequence of potentials interpolating between the U(5) and E(5) symmetries NUCLEAR STRUCTURE 100Pd, 98Ru; calculated levels, J, π, B(E2). Bohr collective Hamiltonian, extensions of E(5) model.
doi: 10.1103/PhysRevC.69.044316
2004BO19 Phys.Lett. B 584, 40 (2004) D.Bonatsos, D.Lenis, N.Minkov, D.Petrellis, P.P.Raychev, P.A.Terziev Ground state bands of the E(5) and X(5) critical symmetries obtained from Davidson potentials through a variational procedure
doi: 10.1016/j.physletb.2004.01.018
2004BO33 Phys.Rev. C 70, 024305 (2004) D.Bonatsos, D.Lenis, N.Minkov, D.Petrellis, P.P.Raychev, P.A.Terziev E(5) and X(5) critical point symmetries obtained from Davidson potentials through a variational procedure
doi: 10.1103/PhysRevC.70.024305
2004BO38 Yad.Fiz. 67, 1795 (2004); Phys.Atomic Nuclei 67, 1767 (2004) D.Bonatsos, D.Lenis, N.Minkov, P.P.Raychev, P.A.Terziev Extended E(5) and X(5) Symmetries: Series of Models Providing Parameter-Independent Predictions
doi: 10.1134/1.1811176
2002BO48 Phys.Rev. C 66, 054306 (2002) D.Bonatsos, B.A.Kotsos, P.P.Raychev, P.A.Terziev Rotationally invariant Hamiltonians for nuclear spectra based on quantum algebras NUCLEAR STRUCTURE 222,224,226,228,230,232,234Th; calculated level energies. Quantum algebra, rotationally invariant Hamiltonian. Comparison with data.
doi: 10.1103/PhysRevC.66.054306
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
1998RA26 J.Phys.(London) G24, 1931 (1998) P.P.Raychev, R.P.Roussev, N.Lo Iudice, P.A.Terziev An Application of the Three-Dimensional q-Deformed Harmonic Oscillator to the Shell Model
doi: 10.1088/0954-3899/24/10/009
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
1995GE09 Phys.Rev. C52, 2131 (1995) A.I.Georgieva, R.P.Roussev, P.P.Raychev, M.V.Stoitsov, S.Pittel, J.Dukelsky Baryon Mappings Applied to the Three-Color Delta Model
doi: 10.1103/PhysRevC.52.2131
1995MI08 J.Phys.(London) G21, 557 (1995) N.Minkov, P.P.Raychev, R.P.Roussev Nuclear Deformation in the SU(q)(2) Rotor Model NUCLEAR STRUCTURE A=154-238; calculated B(λ) vs parameter τ; deduced correlation. Rotational nuclei, Gd, Yb, Th, U isotopes, SU(q)(2) rotor model.
doi: 10.1088/0954-3899/21/4/007
1994BO21 Phys.Rev. C50, 497 (1994) D.Bonatsos, C.Daskaloyannis, A.Faessler, P.P.Raychev, R.P.Roussev Quantum Algebraic Description of Vibrational and Transitional Nuclear Spectra NUCLEAR STRUCTURE 150,152,154Sm, 152,154,158Gd, 154,156,162Dy, 156,158,166Er; calculated levels. Quantum algebraic description, SU(q)(2) model.
doi: 10.1103/PhysRevC.50.497
1994MI14 J.Phys.(London) G20, L67 (1994) N.Minkov, R.P.Roussev, P.P.Raychev Shell Correlations in the SU(q)(2) Rotor Model NUCLEAR STRUCTURE 146Gd, 170,172,174,176,178Hf, 164,166Er, 170,172,174,168,176Yb, 228,230,232Th, 230,232,234,236,238U, 236,238,240,242,244Pu, 248Cm; calculated spectra; deduced nucleon pairs number, quantum algebraic parameter τ correlation. Data comparison, SU(q)(2) rotor model.
doi: 10.1088/0954-3899/20/6/002
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
1990RA19 J.Phys.(London) G16, L137 (1990) P.P.Raichev, R.P.Roussev, Yu.F.Smirnov The Quantum Algebra SU(q)(2) and Rotational Spectra of Deformed Nuclei NUCLEAR STRUCTURE 168Er, 176Yb, 244Pu; calculated rotational level energies. q-analog of SU(2).
doi: 10.1088/0954-3899/16/8/006
1989GE07 Int.J.Theor.Phys. 28, 769 (1989) A.Georgieva, M.Ivanov, P.Raichev, R.Roussev Classification of the Even-Even Nuclei in Symplectic Multiplets NUCLEAR STRUCTURE A=42-258; analyzed 2+ level data; deduced classification scheme. Boson representation of the Sp(4, R) algebra.
doi: 10.1007/BF00669821
1987RA27 Rev.Roum.Phys. 32, 471 (1987) Unified Description of Positive and Negative Parity States in the Deformed Heavy Nuclei by Means of Two Interacting Vector Bosons NUCLEAR STRUCTURE 170Er, 236U; calculated energy levels, J, π. Interacting vector boson model.
1983GE05 J.Phys.(London) G9, 521 (1983) A.Georgieva, P.Raichev, R.Roussev Rotational Limit of the Interacting Two-Vector-Boson Model NUCLEAR STRUCTURE 156Gd, 170Er, 234U; calculated levels, B(E2) ratios. Interacting two-vector boson model, rotational limit.
doi: 10.1088/0305-4616/9/5/005
1978RA14 Yad.Fiz. 27, 1501 (1978); Sov.J.Nucl.Phys. 27, 792 (1978) Energy Levels and Reduced E2-Transition Probabilities of Deformed Even-Even Nucleu in the SU(3) Scheme NUCLEAR STRUCTURE 152,154Sm, 154,156,158Gd, 160,162,164Dy, 160,164,166,168Er; calculated levels, B(E2). SU(3) model.
1972AF02 JINR-P4-6458 (1972) G.N.Afanasiev, S.R.Abramov, P.P.Raichev On SU(3) Physical Basis Realization and Probabilities of B(E2)-Transitions in SU(3) Scheme. II
1972AF05 Yad.Fiz. 16, 53 (1972); Sov.J.Nucl.Phys. 16, 27 (1973) G.N.Afanasev, S.A.Abramov, P.P.Raichev Realization of the Physical Basis for SU(3) and the Probabilities of E2 Transitions in the SU(3) Formalism
1972RA25 Yad.Fiz. 16, 1171 (1972); Sov.J.Nucl.Phys. 16, 643 (1973) Parametrization of B(E2) Transitions in Deformed Even-Even Nuclei within the Framework of the SU(3) Scheme NUCLEAR STRUCTURE 152Sm, 154Gd, 158,166Dy, 166,168Er calculated transition rates.
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