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NSR database version of April 26, 2024.

Search: Author = N.Minkov

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2023BO09      J.Phys.(London) G50, 075105 (2023)

D.Bonatsos, A.Martinou, S.K.Peroulis, T.J.Mertzimekis, N.Minkov

Signatures for shape coexistence and shape/phase transitions in even-even nuclei

NUCLEAR STRUCTURE ⁴⁰Ar, ^40,42Ca, ^70,72Ge, ⁷²Se, ^96,98Sr, ^98,100Zr, ^100,102Mo, ¹⁰⁴Ru, ¹¹⁰Pd, ^112,116Cd, ^114,116,118Sn, ¹²⁶Xe, ^148,150Nd, ^152,154Sm, ^{152,154,156,158}Gd, ¹⁶⁶Er, ^172,174Yb, ^186,192Os, ¹⁹⁶Pt; analyzed available data; deduced systematics of B(E2) transition rates connecting the first excited 0⁺₂ state of the ground state band in even–even nuclei, shape coexistence of the ground state band.

doi: 10.1088/1361-6471/acd70b
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2022BO05      Phys.Lett. B 829, 137099 (2022)

D.Bonatsos, K.E.Karakatsanis, A.Martinou, T.J.Mertzimekis, N.Minkov

Microscopic origin of shape coexistence in the N=90, Z=64 region

NUCLEAR STRUCTURE ^{176,178,180,182,184,186,188,190,192,194,196,198}Po, ^{104,106,108,110,112,114,116,118,120,122,124,126,128,130}Te, ^{70,72,74,76,78,80,82,84,86,88}Zr; calculated single particle states using standard covariant density functional theory; deduced shape coexistence.

doi: 10.1016/j.physletb.2022.137099
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2022BO16      Phys.Rev. C 106, 044323 (2022)

D.Bonatsos, K.E.Karakatsanis, A.Martinou, T.J.Mertzimekis, N.Minkov

Islands of shape coexistence from single-particle spectra in covariant density functional theory

NUCLEAR STRUCTURE ^68,70,90Zn, ^70,72,92Ge, ^72,74,92,94Se, ^74,76,94,96Kr, ^{68,70,72,74,76,78,80,82,84,86,96,98}Sr, ^{72,74,76,78,80,82,84,86,88,98,100}Zr, ^100,102Mo, ^102,104Ru, ^104,106Pd, ^106,108Cd, ^{104,106,108,110,112,114,116,118,120,122,124,126,128,130,142,144,146,148}Te, ^{144,146,148,150}Xe, ^{146,148,150,152}Ba, ^{148,150,152,154}Ce, ^{150,152,154,156}Nd, ^{152,154,156,158}Sm, ^{154,156,158,160}Gd, ^{156,158,160,162}Dy, ^{158,160,162,164}Er, ^{160,162,164,166}Yb, ^{162,164,166,168}Hf, ^{164,166,168,170}W, ^{166,168,170,172}Os, ^{170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200}Pt, ^{172,174,176,178,180,182,184,186,188,190,192,194}Hg, ^{174,176,178,180,182,184,186,188,190,192,194,196}Pb, ^{176,178,180,182,184,186,188,190,192,194,196,198}Po; calculated proton single-particle energy levels, potential energy surface. Covariant density functional theory with the DDME2 functional. Searched for regions with p-h excitations which are attributed to the shape coexistence. Islands of shape coexistence are identified at Z=82 and Z=50, and around the relevant neutron midshells N=104 and N=66.

doi: 10.1103/PhysRevC.106.044323
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2022KI13      Phys.Rev. C 105, 064313 (2022)

T.Kirschbaum, N.Minkov, A.Palffy

Nuclear coherent population transfer to the ^229mTh isomer using x-ray pulses

NUCLEAR REACTIONS ²²⁹Th(γ, γ'), E=29.19 keV; calculated transfer rate to ^229mTe 8 eV state population from second excited state (29.19 keV) populated by coherent x-ray pulses. ²²⁹Th; calculated B(M1), B(E2), radiative transition rates, branching ratios, radiative and total decay width. Investigated the efficiency of nuclear coherent population transfer (NCPT) from the ground state to the isomeric state via two quantum optical transfer schemes: Stimulated Raman adiabatic passage (STIRAP) and use of two subsequent π pulses. Discussed possibility of experimental studies at XFEL facilities. Comparison to experimental data.

doi: 10.1103/PhysRevC.105.064313
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2022MI06      Phys.Rev. C 105, 044329 (2022)

N.Minkov, L.Bonneau, P.Quentin, J.Bartel, H.Molique, D.Ivanova

K-isomeric states in well-deformed heavy even-even nuclei

NUCLEAR STRUCTURE ^234,236U, ^{236,238,240,244}Pu, ^244,246,248Cm, ²⁴⁸Cf, ^248,250,256Fm, ^252,254No; calculated levels, J, π, neutron and proton single-particle spectra, charge radii, quadrupole moments and magnetic moments for ground and isomeric states. Skyrme HF+BCS energy density functional with axial and parity symmetries, and with self-consistent blocking for the isomeric states. Comparison to experimental data.

doi: 10.1103/PhysRevC.105.044329
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2022NA33      Int.J.Mod.Phys. E31, 2250078 (2022)

M.S.Nadirbekov, O.A.Bozarov, S.N.Kudiratov, N.Minkov

Quadrupole and Octupole deformations with effective triaxiality in even-even nuclei

NUCLEAR STRUCTURE ¹⁵⁴Sm, ¹⁵⁴Gd, ¹⁶⁰Gd, ¹⁵⁶Dy, ^228,230,232Th, ^{230,232,234,236,238}U, ²³⁸Pu; calculated energy levels of the yrast alternating-parity bands using nonadiabatic collective model; deduced model parameters.

doi: 10.1142/S0218301322500781
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2022SH31      Phys.Rev. C 106, 014310 (2022)

T.M.Shneidman, N.Minkov, G.G.Adamian, N.V.Antonenko

Effect of Coriolis mixing on lifetime of isomeric states in heavy nuclei

NUCLEAR STRUCTURE ²⁴⁹Cm, ²⁵¹Cf, ²⁵³Fm, ²⁵⁵No, ²⁵⁷Rf; calculated one-quasiparticle spectra, levels, J, π, Nilsson configurations using the two-center shell model (TCSM), and axially symmetric deformed shell model, matrix elements for the Coriolis interaction between different quasiparticle states, components contributing to the wave functions of second 7/2+ states, energy interval between the two lowest 7/2+ states, B(E2), B(M1), half-lives of the 7/2+ isomeric states; deduced that Coriolis mixing leads to the enhanced quadrupole transition rate from the isomeric state in ²⁵¹Cf, and reduced half-life of its lowest isomeric state. Comparison with available experimental data.

doi: 10.1103/PhysRevC.106.014310
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2021BE23      Phys.Rev.Lett. 127, 112501 (2021)

S.Beck, B.Kootte, I.Dedes, T.Dickel, A.A.Kwiatkowski, E.M.Lykiardopoulou, W.R.Plass, M.P.Reiter, C.Andreoiu, J.Bergmann, T.Brunner, D.Curien, J.Dilling, J.Dudek, E.Dunling, J.Flowerdew, A.Gaamouci, L.Graham, G.Gwinner, A.Jacobs, R.Klawitter, Y.Lan, E.Leistenschneider, N.Minkov, V.Monier, I.Mukul, S.F.Paul, C.Scheidenberger, R.I.Thompson, J.L.Tracy, Jr., M.Vansteenkiste, H.-L.Wang, M.E.Wieser, C.Will, J.Yang

Mass Measurements of Neutron-Deficient Yb Isotopes and Nuclear Structure at the Extreme Proton-Rich Side of the N=82 Shell

ATOMIC MASSES ^{150,151,152,153,154,155,156}Yb; measured frequencies, TOF; deduced mass excess values. Comparison with systematics, AME2020 evaluation. TITAN's multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS).

RADIOACTIVITY ¹⁵¹Yb(IT); measured decay products; deduced excitation energy.

doi: 10.1103/PhysRevLett.127.112501
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2021BO08      Nucl.Phys. A1009, 122158 (2021)

D.Bonatsos, I.E.Assimakis, A.Martinou, S.Sarantopoulou, S.K.Peroulis, N.Minkov

Energy differences of ground state and γ₁ands as a hallmark of collective behavior

doi: 10.1016/j.nuclphysa.2021.122158
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2021MA25      Eur.Phys.J. A 57, 84 (2021)

A.Martinou, D.Bonatsos, T.J.Mertzimekis, K.E.Karakatsanis, I.E.Assimakis, S.K.Peroulis, S.Sarantopoulou, N.Minkov

The islands of shape coexistence within the Elliott and the proxy-SU(3) Models

NUCLEAR STRUCTURE N=120-190; analyzed available data; deduced nucleon number systematics.

doi: 10.1140/epja/s10050-021-00396-w
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2021MA26      Eur.Phys.J. A 57, 83 (2021)

A.Martinou, D.Bonatsos, K.E.Karakatsanis, S.Sarantopoulou, I.E.Assimakis, S.K.Peroulis, N.Minkov

Why nuclear forces favor the highest weight irreducible representations of the fermionic SU(3) symmetry

NUCLEAR STRUCTURE ²⁰⁸Pb; analyzed available data; deduced prolate to oblate shape transitions.

doi: 10.1140/epja/s10050-021-00395-x
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2021MI03      Phys.Rev. C 103, 014313 (2021)

N.Minkov, A.Palffy

^229mTh isomer from a nuclear model perspective

NUCLEAR STRUCTURE ^229,229mTh; calculated β₂ versus β₃ plots as function of K values for the g.s. and isomer state single particle orbitals and the respective average parities, single-particle and quasiparticle energy of the 3/2+ isomer orbital with respect to the 5/2+ g.s. orbital, B(M1) and B(E2) for the isomeric transition, magnetic moments for the g.s. and the isomer. Quadrupole-octupole (QO) vibration-rotation core plus particle model with Woods-Saxon deformed shell model (DSM) quadrupole and octupole deformations. Comparison with experimental data.

doi: 10.1103/PhysRevC.103.014313
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2020BO16      Eur.Phys.J. Special Topics 229, 2367 (2020)

D.Bonatsos, A.Martinou, S.Sarantopoulou, I.E.Assimakis, S.Peroulis, N.Minkov

Parameter-free predictions for the collective deformation variables b and γ within the pseudo-SU(3) scheme

NUCLEAR STRUCTURE ^{142,144,146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180}Ce, ^{146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184}Sm, ^{148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184,186}Dy, ^{154,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194}Yb, ^{158,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194}W, ^{162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202}Pt; calculated distribution of valence protons and valence neutrons, weight of irreducible representations, collective deformation parameters.

doi: 10.1140/epjst/e2020-000034-3
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2020MA49      Eur.Phys.J. A 56, 239 (2020)

A.Martinou, D.Bonatsos, N.Minkov, I.E.Assimakis, S.K.Peroulis, S.Sarantopoulou, J.Cseh

Proxy-SU(3) symmetry in the shell model basis

doi: 10.1140/epja/s10050-020-00239-0
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2020NA20      Int.J.Mod.Phys. E29, 2050031 (2020)

M.S.Nadirbekov, S.N.Kudiratov, F.N.Temirov, N.Minkov

Vibrational-rotational spectra of even-even nuclei with quadrupole and octupole deformations

NUCLEAR STRUCTURE ¹⁵⁰Nd, ¹⁵⁴Sm, ^154,160Gd, ^162,164Er, ^228,232Th, ^230,236,238U, ²⁴⁰Pu; calculated energy levels of yrast and nonyrast bands in the framework of a nonadiabatic collective model of even-even nuclei with quadrupole and octupole deformations.

doi: 10.1142/S0218301320500317
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2020PE07      Phys.Rev. C 102, 014311 (2020)

C.M.Petrache, N.Minkov, T.Nakatsukasa, B.F.Lv, A.Astier, E.Dupont, 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, M.L.Liu, J.G.Wang, X.H.Zhou, I.Kuti, J.Timar, A.Tucholski, J.Srebrny, C.Andreoiu

Signatures of enhanced octupole correlations at high spin in ¹³⁶Nd

NUCLEAR REACTIONS ¹⁰⁰Mo(⁴⁰Ar, 4n), E=152 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) using the JUROGAM II array at the University of Jyvaskyla. Enriched target. ¹³⁶Nd; deduced high-spin levels, J, π, multipolarities, bands, B(E1)/B(E2) ratios, electric dipole moments D₀, configurations, alignments, enhanced octupole correlations at high spins. Comparison with cranked quasiparticle random phase approximation (QRPA) calculations, and with quadrupole-octupole rotations model (QORM).

doi: 10.1103/PhysRevC.102.014311
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2019MI05      Phys.Rev.Lett. 122, 162502 (2019)

N.Minkov, A.Palffy

Theoretical Predictions for the Magnetic Dipole Moment of ^229mTh

NUCLEAR MOMENTS ²²⁹Th; calculated isomeric state nuclear magnetic moments. Comparison with available data.

doi: 10.1103/PhysRevLett.122.162502
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2018BI05      Phys.Rev. C 97, 044320 (2018)

P.V.Bilous, N.Minkov, A.Palffy

Electric quadrupole channel of the 7.8 eV ²²⁹Th transition

RADIOACTIVITY ²²⁹Th(IT); calculated B(M1), B(E2) for 7.8-eV γ transition from ^229mTh to the g.s. for internal conversion (IC) and electronic bridging (EB) modes in neutral and partially ionized atoms involving 7s, 7p_1/2, 7p_3/2 6d_3/2, 6d_5/2, 5f_5/2 and 5f_7/2 atomic orbitals; deduced dominance of E2 channel in IC or EB multipole mixing for 7p, 6d, and 5f atomic orbitals. Dirac-Hartree-Fock (DHF) and random-phase approximation (RPA) method. Comparison with other theoretical results.

doi: 10.1103/PhysRevC.97.044320
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2018NA21      Int.J.Mod.Phys. E27, 1850069 (2018)

M.S.Nadirbekov, N.Minkov

B(E1)- and B(E2)-transition probabilities in alternating-parity spectra of lanthanide and actinide nuclei

NUCLEAR STRUCTURE ¹⁵⁰Nd, ^152,154Sm, ¹⁵⁴Gd, ¹⁵⁶Dy, ^162,164Er, ^{232,234,236,238}U; calculated B(E2), B(E1). Comparison with experimental data.

doi: 10.1142/S0218301318500696
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2017BO11      Phys.Rev. C 95, 064325 (2017)

D.Bonatsos, I.E.Assimakis, N.Minkov, A.Martinou, R.B.Cakirli, R.F.Casten, K.Blaum

Proxy-SU(3) symmetry in heavy deformed nuclei

doi: 10.1103/PhysRevC.95.064325
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2017BO12      Phys.Rev. C 95, 064326 (2017)

D.Bonatsos, I.E.Assimakis, N.Minkov, A.Martinou, S.Sarantopoulou, R.B.Cakirli, R.F.Casten, K.Blaum

Analytic predictions for nuclear shapes, prolate dominance, and the prolate-oblate shape transition in the proxy-SU(3) model

NUCLEAR STRUCTURE ^{112,114,116,118,120,122,124,126,128,130,144,146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176}Ba, ^{114,116,118,120,122,124,126,128,130,132,134,146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178}Ce, ^{116,118,120,122,124,126,128,130,132,134,136,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180}Nd, ^{118,120,122,124,126,128,130,132,134,136,138,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180,182}Sm, ^{120,122,124,126,128,130,132,134,136,138,140,154,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184}Gd, ^{122,124,126,128,130,132,134,136,138,140,142,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184,186}Dy, ^{124,126,128,130,132,134,136,138,140,142,146,158,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188}Er, ^{126,128,130,132,134,136,138,140,142,146,148,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190}Yb, ^{128,130,132,134,136,138,140,142,146,148,150,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192}Hf, ^{130,132,134,136,138,140,142,146,148,150,152,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194}W, ^{132,134,136,138,140,142,146,148,150,152,154,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196}Os, ^{134,136,138,140,142,146,148,150,152,154,156,178,180,182,184,186,188,190,192,194,196,198}Pt; calculated β and γ deformations using a new approximate analytic parameter-free proxy-SU(3) model. Comparison with empirical results.

doi: 10.1103/PhysRevC.95.064326
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2017MI07      Phys.Rev.Lett. 118, 212501 (2017)

N.Minkov, A.Palffy

Reduced Transition Probabilities for the Gamma Decay of the 7.8 eV Isomer in ²²⁹Th

RADIOACTIVITY ²²⁹Th(IT); calculated the reduced magnetic dipole, electric quadrupole transition probabilities for the radiative decay of the 7.8 eV isomer to the ground state.

doi: 10.1103/PhysRevLett.118.212501
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2016NA10      Int.J.Mod.Phys. E25, 1650022 (2016)

M.S.Nadirbekov, N.Minkov, M.Strecker, W.Scheid

Application of the triaxial quadrupole-octupole rotor to the ground and negative-parity levels of actinide nuclei

NUCLEAR STRUCTURE ^228,232Th, ^{230,232,234,236,238}U, ²⁴⁰Pu; calculated energy levels, J, π, staggering. Comparison with available data.

doi: 10.1142/S0218301316500221
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2015BO04      Phys.Rev. C 91, 054307 (2015)

L.Bonneau, N.Minkov, D.D.Duc, P.Quentin, J.Bartel

Effect of core polarization on magnetic dipole moments in deformed odd-mass nuclei

NUCLEAR STRUCTURE ⁹⁹Sr, ⁹⁹Y, ¹⁰³Mo, ¹⁰³Tc, ¹⁷⁵Yb, ¹⁷⁵Lu, ¹⁷⁹Hf, ¹⁷⁹Ta, ²³⁵U, ^235,237Np; calculated binding energies, mass quadrupole moments, magnetic dipole moments, collective gyromagnetic factors, effective spin gyromagnetic factors; analyzed core-polarization effects. Skyrme-Hartree-Fock-BCS approach with selfconsistent blocking and time-odd terms of the Skyrme EDF. Seniority force in BCS calculations. Axial symmetry. Perturbative analysis of time-odd Hartree-Fock Hamiltonian and core-polarization effect on spin gyromagnetic factor. Comparison with experimental data.

doi: 10.1103/PhysRevC.91.054307
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2015BO05      Phys.Rev. C 91, 054315 (2015)

D.Bonatsos, A.Martinou, N.Minkov, S.Karampagia, D.Petrellis

Octupole deformation in light actinides within an analytic quadrupole octupole axially symmetric model with a Davidson potential

NUCLEAR STRUCTURE ^222,224,226Ra, ^224,226Th; calculated levels, J, π, B(E1), BE(2), B(E3). Analytic quadrupole octupole axially (AQOA) symmetric model using Davidson potential. Bohr collective Hamiltonian, and quadrupole plus octupole deformation. Comparison with experimental data.

doi: 10.1103/PhysRevC.91.054315
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2015BO10      J.Phys.(London) G42, 095104 (2015)

D.Bonatsos, N.Minkov, D.Petrellis

Bohr Hamiltonian with a deformation-dependent mass term: physical meaning of the free parameter

doi: 10.1088/0954-3899/42/9/095104
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2014MI26      Phys.Scr. 89, 054021 (2014)

N.Minkov, P.Walker

Influence of the octupole mode on nuclear high-K isomeric properties

NUCLEAR STRUCTURE ^154,156Gd, ¹⁶⁰Sm, ^154,156Nd, ^234,236U, ^238,244Pu, ^244,246,248Cm, ^250,256Fm, ^250,252,254No, ²⁷⁰Ds; calculated 2qp states energy vs octupole-quadrupole deformation surface, magnetic dipole moment for high-K isomeric states using deformed shell model with pairing.

doi: 10.1088/0031-8949/89/5/054021
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2013BO24      Phys.Rev. C 88, 034316 (2013)

D.Bonatsos, P.E.Georgoudis, N.Minkov, D.Petrellis, C.Quesne

Bohr Hamiltonian with a deformation-dependent mass term for the Kratzer potential

NUCLEAR STRUCTURE ^{98,100,102,104}Ru, ^{102,104,106,108,110,112,114,116}Pd, ^{106,108,110,112,114,116,118,120}Cd, ^{118,120,122,124,126,128,130,132,134}Xe, ^{130,132,134,136,142}Ba, ^134,136,138Ce, ^140,148,150Nd, ^{140,142,152,154}Sm, ^{142,144,152,154,156,158,160,162}Gd, ^{154,156,158,160,162,164,166}Dy, ^{156,160,162,164,166,168,170}Er, ^{162,164,166,168,170,172,174,176,178}Yb, ^{166,168,170,172,174,176,178,180}Hf, ^{176,178,180,182,184,186}W, ^{176,178,180,184,186,188,190}Os, ^{186,188,190,192,194,196,198,200}Pt, ²²⁸Ra, ^228,230,232Th, ^{232,234,236,238}U, ^238,240,242Pu, ²⁴⁸Cm, ²⁵⁰Cf; calculated levels, J, π, ground, β and γ bands, B(E2), ratios of level energies of yrast bands and low-lying positive-parity levels. Deformation-dependent mass (DDM) Bohr Hamiltonian with Kratzer potential obtained for γ-unstable, axially symmetric prolate deformed, and triaxial nuclei. Techniques of supersymmetric quantum mechanics (SUSYQM).

doi: 10.1103/PhysRevC.88.034316
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2013LA25      Phys.Rev. C 88, 024302 (2013)

S.Lalkovski, A.M.Bruce, A.M.D.Bacelar, M.Gorska, S.Pietri, Zs.Podolyak, P.Bednarczyk, L.Caceres, E.Casarejos, I.J.Cullen, P.Doornenbal, G.F.Farrelly, A.B.Garnsworthy, H.Geissel, W.Gelletly, J.Gerl, J.Grebosz, C.Hinke, G.Ilie, D.Ivanova, G.Jaworski, S.Kisyov, I.Kojouharov, N.Kurz, N.Minkov, S.Myalski, M.Palacz, P.Petkov, W.Prokopowicz, P.H.Regan, H.Schaffner, S.Steer, S.Tashenov, P.M.Walker, H.J.Wollersheim

Submicrosecond isomer in ₄₅¹¹⁷RH₇₂ and the role of triaxiality in its electromagnetic decay rate

NUCLEAR REACTIONS ⁹Be(²³⁸U, F)¹¹⁷Rh/¹¹⁷Ru/¹²¹Pd/¹²²Ag/¹²³Ag/¹²⁴Ag, E=750 MeV/nucleon; measured yields. ⁹Be(²³⁸U, F)¹¹⁷Rh, E=750 MeV/nucleon; measured Eγ, (fragment)γ-coin, (fragment)γ(t), isomer half-life at GSI facility using FRS-RISING setup. ¹¹⁷Rh; deduced level, isomer, J, π, B(Eλ) and B(Mλ) transition probabilities; comparison with deformed shell model, and particle-rotor model calculations. Systematics of low-lying levels and isomers in ^{101,103,105,107,109,111,113,115}Rh nuclei. Role of triaxiality in the decay of isomers.

doi: 10.1103/PhysRevC.88.024302
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2013MI11      Phys.Scr. T154, 014017 (2013)

N.Minkov

A model for quasi-parity-doublet spectra in odd-mass nuclei

NUCLEAR STRUCTURE ²²³Ra, ²²¹Fr; calculated energy levels, J, π, yrast bands. Quadrupole-octupole vibrating and rotating core plus a particle model, comparison with available data.

doi: 10.1088/0031-8949/2013/T154/014017
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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
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2012BO22      J.Phys.:Conf.Ser. 366, 012017 (2012)

D.Bonatsos, P.E.Georgoudis, D.Lenis, N.Minkov, C.Quesne

Fixing the moment of inertia in the Bohr Hamiltonian through Supersymmetric Quantum Mechanics

NUCLEAR STRUCTURE ¹⁶²Dy, ²³⁸U; calculated energy levels, J of gs band, deformation of states using Bohr-Mottelson model. Compared with data.

doi: 10.1088/1742-6596/366/1/012017
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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
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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
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2012MI18      Eur.Phys.J. A 48, 80 (2012)

N.Minkov, P.M.Walker

Magnetic moments of K isomers as indicators of octupole collectivity

NUCLEAR STRUCTURE ¹⁵⁴Nd, ¹⁶⁰Sm, ^154,156Gd, ²³⁶U, ²³⁸Pu, ²⁴⁴Cm; calculated neutron single-particle levels, J, π, potential energy vs quadrupole, octupole deformation, magnetic moment using reflection asymmetric shell model.

doi: 10.1140/epja/i2012-12080-y
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2012NA10      Int.J.Mod.Phys. E21, 1250044 (2012)

M.S.Nadirbekov, G.A.Yuldasheva, N.Minkov, W.Scheid

Collective excited states in even-even nuclei with quadrupole and octupole deformations

NUCLEAR STRUCTURE ¹⁵⁰Nd, ^152,154Sm, ^154,156,158Gd, ¹⁵⁶Dy, ^162,164Er, ²²⁴Ra, ²²⁸Th, ^{232,234,236,238}U, ²⁴⁰Pu; calculated energy levels, J, π, staggering effects, yrast bands. Comparison with available data.

doi: 10.1142/S0218301312500449
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2011BO08      Int.J.Mod.Phys. E20, 252 (2011)

L.Bonneau, J.Le Bloas, P.Quentin, N.Minkov

Effects of core polarization and pairing correlations on some ground-state properties of deformed odd-mass nuclei within the Higher Tamm-Dancoff approach

NUCLEAR STRUCTURE ²³Na, ^23,24,25Mg, ²⁵Al, ⁴⁸Cr; calculated binding energies, magnetic moments.

doi: 10.1142/S0218301311017594
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2011BO12      Phys.Rev. C 83, 044321 (2011)

D.Bonatsos, P.E.Georgoudis, D.Lenis, N.Minkov, C.Quesne

Bohr Hamiltonian with a deformation-dependent mass term for the Davidson potential

NUCLEAR STRUCTURE ^{98,100,102,104}Ru, ^{102,104,106,108,110,112,114,116}Pd, ^{106,108,110,112,114,116,118,120}Cd, ^{118,120,122,124,126,128,130,132,134}Xe, ^{130,132,134,136,142}Ba, ^134,136,138Ce, ^140,148,150Nd, ^{140,142,152,154}Sm, ^{142,144,152,154,156,158,160,162}Gd, ^{154,156,158,160,162,164,166}Dy, ^{156,160,162,164,166,168,170}Er, ^{162,164,166,168,170,172,174,176,178}Yb, ^{166,168,170,172,174,176,178,180}Hf, ^{176,178,180,182,184,186}W, ^{176,178,180,184,186,188,190}Os, ^{186,188,190,192,194,196,198,200}Pt, ²²⁸Ra, ^228,230,232Th, ^{232,234,236,238}U, ^238,240,242Pu, ²⁴⁸Cm, ²⁵⁰Cf; calculated levels, J, π, B(E2). Bohr collective Hamiltonian, β₂ deformation dependent mass, curved space, Davidson potential. Comparison with experimental data.

doi: 10.1103/PhysRevC.83.044321
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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
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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
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2010QU01      Int.J.Mod.Phys. E19, 611 (2010)

P.Quentin, L.Bonneau, N.Minkov, D.Samsoen

Odd nuclei, time-reversal symmetry breaking, and magnetic polarization of the even-even core

NUCLEAR STRUCTURE ^48,49Cr, ⁴⁹Mn, ^98,99Sr, ⁹⁹Y, ^102,103Mo, ¹⁰³Tc, ^174,175Yb, ¹⁷⁵Lu, ^178,179Hf, ¹⁷⁹Ta, ^234,235U, ²³⁵Np; calculated spin operators and quenching factors, core polarization of magnetic moments. Skyrme force parameterization.

doi: 10.1142/S0218301310015023
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2010WA34      Phys.Lett. B 694, 119 (2010)

P.M.Walker, N.Minkov

High-K isomers as probes of octupole collectivity in heavy nuclei

NUCLEAR STRUCTURE ²³⁴U, ²⁴⁴Pu, ²⁴⁴Cm; calculated neutron single-particle levels, magnetic moments as a function of octupole deformation for high-K isomeric states. Asymmetric deformed shell model.

doi: 10.1016/j.physletb.2010.09.049
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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, ^{219,223,225,233}Ra, 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
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2007BO46      Phys.Rev. C 76, 064312 (2007)

D.Bonatsos, E.A.McCutchan, N.Minkov, R.F.Casten, P.Yotov, D.Lenis, D.Petrellis, I.Yigitoglu

Exactly separable version of the Bohr Hamiltonian with the Davidson potential

NUCLEAR STRUCTURE ¹⁵⁴Sm, ^{156,158,160,162}Gd, ^{158,160,162,164,166}Dy, ^{160,162,164,166,168,170}Er, ^{164,166,168,170,172,174,176,178}Yb, ^{168,170,172,174,176,178,180}Hf, ^{176,178,180,182,184,186}W, ^{180,182,184,186,188}Os, ²²⁸Ra, ^228,230,232Th, ^{232,234,236,238}U, ^238,240,242Pu, ²⁴⁸Cm, ²⁵⁰Cf; calculated excitation energy ratios, angular momenta, B(E2) ratios, bandhead energies, deformation parameters using Bohr Hamiltonian with Davidson Potential, compared with experimental values.

doi: 10.1103/PhysRevC.76.064312
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2007LA03      Phys.Rev. C 75, 014314 (2007)

S.Lalkovski, S.Ilieva, A.Minkova, N.Minkov, T.Kutsarova, A.Lopez-Martens, A.Korichi, H.Hubel, A.Gorgen, A.Jansen, G.Schonwasser, B.Herskind, M.Bergstrom, Zs.Podolyak

Octupole collectivity in ^{98, 100, 102}Mo

NUCLEAR REACTIONS ¹⁶⁸Er(³⁰Si, F)⁹⁸Mo/¹⁰⁰Mo/¹⁰²Mo, E=142 MeV; measured Eγ, Iγ, γγ-coin. ^98,100,102Mo deduced levels, J, π. Euroball III array, Soft-octupole vibration model analysis.

doi: 10.1103/PhysRevC.75.014314
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2007MI01      J.Phys.(London) G34, 299 (2007)

N.Minkov, P.Yotov, R.V.Jolos, W.Scheid

Intrinsic origin of the high order angular momentum terms in an nuclear rotation Hamiltonian

doi: 10.1088/0954-3899/34/2/010
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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 ^{219,221,223,225}Fr, ^223,225Th; calculated level energies of positive and negative parity bands using the collective axial quadrupole-octupole Hamiltonian.

doi: 10.1134/S1063778807080248
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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
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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
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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
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2005BO18      Phys.Rev. C 71, 064309 (2005)

D.Bonatsos, D.Lenis, N.Minkov, D.Petrellis, P.Yotov

Analytic description of critical-point actinides in a transition from octupole deformation to octupole vibrations

NUCLEAR STRUCTURE ^{220,222,224,226,228,230,232,234}Th, ^{218,220,222,224,226,228,230}Ra; calculated ground and vibrational bands level energies, B(E1), B(E2), critical point symmetry, shape transition features.Analytic quadrupole octupole axially symmetric model, comparison with data.

doi: 10.1103/PhysRevC.71.064309
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2005JO25      Phys.Rev. C 72, 064312 (2005)

R.V.Jolos, N.Minkov, W.Scheid

Inversion of parity splitting in alternating parity bands at high angular momenta

NUCLEAR STRUCTURE ²²⁰Ra; calculated parity splitting, odd-even staggering, inversion in alternating-parity rotational bands; deduced role of barrier penetration and angular momentum alignment.

doi: 10.1103/PhysRevC.72.064312
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2005LA10      J.Phys.(London) G31, 427 (2005)

S.Lalkovski, N.Minkov

Evolution of collectivity in a ground-γ-band mixing scheme for even-even transitional nuclei

NUCLEAR STRUCTURE ^{100,102,104,106,108}Mo, ^{104,106,108,110,112}Ru, ^{108,110,112,114,116}Pd; calculated ground-state and γ-vibrational bands level energies, B(E2), band-mixing effects. Comparison with data.

doi: 10.1088/0954-3899/31/5/013
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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
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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
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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
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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
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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
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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
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2003SU27      Nucl.Phys. A722, 360c (2003)

S.Sugimoto, H.Toki, K.Ikeda, N.Minkov

Relativistic mean field theory with the pion of finite nuclei

NUCLEAR STRUCTURE ¹²C, ¹⁶O, ⁴⁰Ca, ⁵⁶Ni, ⁸⁰Zr, ¹⁰⁰Sn, ¹⁶⁴Pb; calculated pion mean field, pion energy per nucleon. Relativistic mean field approach.

doi: 10.1016/S0375-9474(03)01390-3
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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
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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
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2002MI50      Prog.Theor.Phys.(Kyoto), Suppl. 146, 597 (2002)

N.Minkov, S.Drenska

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
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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
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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
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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, ^{218,220,222,224,226}Ra, ^{220,222,224,226,228}Th; analyzed octupole bands transition energies; deduced beat patterns, possible mechanisms. Predictions of algebraic models discussed.

doi: 10.1103/PhysRevC.62.024301
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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
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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, ^{154,156,158,160}Gd, ^{158,160,162,164}Dy, ^{162,164,166,168,170}Er, ^{168,170,172,174,176}Yb, ^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
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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
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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, ^{154,156,158,160}Gd, ^160,162,164Dy, ^{160,162,164,166,168,170}Er, ^{166,168,170,172}Yb, ^{172,174,176,178,180}Hf, ^{178,180,182,184}W, ²³²Th, ^232,234U; analyzed (β)-, (γ)-bands levels, B(λ) data. Rotator SU(q)(2) model.

doi: 10.1088/0954-3899/22/11/010
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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
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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, ^{170,172,174,176,178}Hf, ^164,166Er, ^{170,172,174,168,176}Yb, ^228,230,232Th, ^{230,232,234,236,238}U, ^{236,238,240,242,244}Pu, 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
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