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NSR database version of April 27, 2024.

Search: Author = A.Martinou

Found 12 matches.

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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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2022HA30      Nucl.Phys. A1028, 122540 (2022)

M.M.Hammad, A.Martinou, D.Bonatsos

Algebraic solutions for o(12) ← → u(2) (x) u(10) quantum phase transitions in the proton-neutron interacting boson model

doi: 10.1016/j.nuclphysa.2022.122540
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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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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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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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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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