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NSR database version of May 8, 2024.

Search: Author = A.I.Budaca

Found 23 matches.

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2024BU04      Nuovo Cim. C 47, 25 (2024)

R.Budaca, P.Buganu, A.I.Budaca

Axial quadrupole and octupole dynamics in heavy even-even nuclei

NUCLEAR STRUCTURE ^224,226,228Ra, ^224,226,228Th, ²³²Th, ²³⁶U; calculated B(E2) using a quadrupole-octupole axially symmetric collective model; deduced a critical region where a shape phase transition commences between stable and dynamic octupole deformation.

doi: 10.1393/ncc/i2024-24025-0
Citations: PlumX Metrics

2023BU12      Eur.Phys.J. A 59, 242 (2023), Pub Erratum Eur.Phys.J. A 59, 261 (2023)

R.Budaca, P.Buganu, A.I.Budaca

Quadrupole-octupole shape and dynamics of ²²²Ra

NUCLEAR STRUCTURE ²²²Ra; analyzed available data; deduced parameters for a phenomenological model based on an axial quadrupole–octupole Bohr Hamiltonian, to determine its shape and the nature of the excited band.

doi: 10.1140/epja/s10050-023-01163-9
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2023BU13      J.Phys.(London) G50, 125101 (2023)

R.Budaca, A.I.Budaca

Spin dynamics of triaxial odd mass nuclei with quasiparticle alignments

NUCLEAR STRUCTURE ¹⁰⁵Pd, ¹³³La, ¹³⁵Pr; calculated energy surfaces, total angular momentum, wobbling energy as a function of angular momentum, energies of the yrast and excited bands in a semiclassical approach. Comparison with available data.

doi: 10.1088/1361-6471/acfcd0
Citations: PlumX Metrics

2022AK06      Eur.Phys.J. A 58, 145 (2022)

D.T.Akrawy, A.I.Budaca, G.Saxena, A.H.Ahmed

Generalization of the screened universal α-decay law by asymmetry and angular momentum

RADIOACTIVITY ^106,108Te, ¹¹²Xe, ¹¹⁴Ba, ^146,148Sm, ^148,150,152Gd, ^150,152,154Dy, ^152,154Er, ^154,156Yb, ^156,158,160Hf, ^158,160,162W, ¹⁶⁶W, ¹⁶²Os, ¹⁶⁶Os, ¹⁷⁰Os, ¹⁷⁴Os, ^{178,180,182,184}Pt, ^188,190Pt, ^174,176Hg, ^180,182,184Hg, ¹⁸⁸Hg, ^188,190Pb, ²¹⁰Pb, ^{190,192,194,196,198,200,202,204,206,208,210,212,214,216,218}Po, ^{194,196,198,200,202}Rn, ^{206,208,210,212}Rn, ^218,220,222Rn, ^{206,208,210,212,214}Ra, ^{220,222,224,226}Ra, ²¹⁰Th, ^216,218Th, ^{222,224,226,228,230,232}Th, ^{224,226,228,230,232,234,236,238}U, ^{230,232,234,236,238,240,242,244}Pu, ^{238,240,242,244,246,248}Cm, ²⁴⁰Cf, ^{244,246,248,250,252,254}Cf, ^{248,250,252,254,256}Fm, ²⁵²No, ²⁵⁶No, ^256,258Rf, ^260,262Sg, ^264,266Hs, ²⁷⁰Hs, ²⁷⁰Ds, ^286,288Fl, ^290,292Lv, ²⁹⁴Og, ^105,107Te, ¹⁰⁹Xe, ¹⁴⁷Sm, ¹⁵¹Gd, ^151,153Dy, ^153,155Er, ^155,157Yb, ¹⁵⁷Hf, ¹⁵⁹W, ¹⁶⁵W, ¹⁶¹Os, ¹⁶⁷Os, ¹⁷³Os, ^{167,169,171,173,175,177}Pt, ¹⁸³Pt, ^{173,175,177,179}Hg, ^183,185Hg, ¹⁹¹Pb, ^187,189,191Po, ^{195,197,199,201}Po, ^{205,207,209,211,213}Po, ^{195,197,199,201,203}Rn, ^{207,209,211,213,215}Rn, ^219,221Rn, ^203,205Ra, ^{209,211,213,215,217,219,221}Ra, ^{211,213,215,217,219,221,223,225,227}Th, ^217,219U, ^223,225U, ²³⁵U, ^239,241Pu, ^{241,243,245,247}Cm, ^249,251Cf, ^{251,253,255,257}Fm, ²⁶³Rf, ^259,261Sg, ^269,271Sg, ^265,267Hs, ²⁷³Hs, ²⁶⁷Ds, ^269,271,273Ds, ²⁷⁷Ds, ²⁸¹Ds, ²⁸¹Cn, ²⁸⁵Cn, ^287,288,289Fl, ^291,293Lv, ¹¹¹I, ¹⁴⁷Eu, ^149,151Tb, ¹⁵³Tm, ¹⁶⁹Ir, ¹⁷⁷Ir, ¹⁷³Au, ^181,183,185Au, ^177,179Tl, ^187,189Bi, ^193,195Bi, ^211,213Bi, ^{197,199,201,203,205,207,209,211,213,215,217,219}At, ^{201,203,205,207,209,211,213,215,217,219,221,223}Fr, ^{209,211,213,215,217,219,221,223,225,227}Ac, ^{213,215,217,219}Pa, ^225,227Pa, ²³¹Pa, ^235,237Np, ^239,241,243Am, ^243,245Bk, ²⁴⁹Bk, ^243,245Es, ^255,257Lr, ^257,259Db, ²⁶³Db, ²⁶¹Bh, ²⁶⁷Bh, ²⁷⁵Mt, ²⁷⁹Rg, ^283,285Nh, ^287,289Mc, ²⁹³Ts, ^110,112I, ¹¹⁴Cs, ¹⁴⁸Eu, ^152,154Ho, ^154,156Tm, ¹⁵⁸Lu, ¹⁶²Ta, ^160,162Re, ¹⁶⁶Ir, ^170,172,174Au, ¹⁸²Au, ¹⁸²Tl, ^212,213,214Bi, ^{196,198,200,202,204,206,208,210,212,214,216,218}At, ^{200,202,204,206,208,210,212,214,216,218,220}Fr, ^{206,208,210,212,214,216,218,220,222,224}Ac, ²¹²Pa, ²¹⁶Pa, ²²⁶Pa, ²³⁰Pa, ²⁵⁴Es, ²⁵⁶Md, ^256,258Db, ²⁶⁰Bh, ^264,266Bh, ^270,272,274Bh, ²⁶⁸Mt, ^274,276,278Mt, ^272,274Rg, ^278,280Rg, ²⁷⁸Nh, ^284,286Nh, ^288,290Mc, ²⁹⁴Ts(α); calculated T_1/2. Comparison with available data.

doi: 10.1140/epja/s10050-022-00789-5
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2022BU01      Nucl.Phys. A1017, 122355 (2022)

R.Budaca, A.I.Budaca

Deformation dependence of the screened decay law for proton emission

RADIOACTIVITY ^108,109I, ^112,113Cs, ¹¹⁷La, ¹²¹Pr, ^130,131Eu, ¹³⁵Tb, ¹⁴¹Ho, ^145,146,147Tm, ^150,151Lu, ^155,156,157Ta, ^159,160,161Re, ^166,167Ir, ^170,171Au, ^176,177Tl, ¹⁸⁵Bi(p); calculated T_1/2. Comparison with available data.

doi: 10.1016/j.nuclphysa.2021.122355
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2022BU17      Phys.Rev. C 106, 014311 (2022)

R.Budaca, P.Buganu, A.I.Budaca

Nuclear collective motion of heavy nuclei with axial quadrupole and octupole deformation

NUCLEAR STRUCTURE ^224,226,228Ra, ^{224,226,228,230,232,234}Th, ^{230,232,234,236,238,240}U, ^236,238,240Pu; calculated energy levels, J, π, B(E1), B(E2), B(E3), related features of the alternate parity bands corresponding to octupole vibration or a stable deformation. Axially symmetric quadrupole-octupole Bohr model. Comparison with experimental data.

doi: 10.1103/PhysRevC.106.014311
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2021BU02      Eur.Phys.J. A 57, 41 (2021)

A.I.Budaca

Screening amendment to the universal decay law for alpha decay

RADIOACTIVITY ^{186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219}Po, ^{194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222}Rn, ^{202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226}Ra, ^{208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232}Th, ^{214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238}U, ^{228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244}Pu, ^{234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250}Cm, ^{240,241,242,243,244,245,246,247,248,249,250,251,252,253,254}Cf, ^{246,247,248,249,250,251,252,253,254,255,256}Fm, ^{251,252,253,254,255,256}No, ^{254,260,264,266,268}Rf, ^{258,262,264,266,268,270,272}Sg, ^272,274,276Hs, ^{268,272,274,276,278,280}Ds, ^{276,278,280,282,284}Cn, ²⁸⁴Fl, ^{253,259,261,263,265,267}Rf, ^{259,261,263,265,267,269,271,273}Sg, ^{263,265,267,269,271,273,275,277}Hs, ^{267,269,271,273,275,277,279,281}Ds, ^{277,279,281,283,285}Cn, ^285,287,289Fl, ^289,291,293Lv(α); calculated T_1/2. Comparison with available data.

doi: 10.1140/epja/s10050-021-00359-1
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2020BU05      Phys.Rev. C 101, 064318 (2020)

A.I.Budaca, R.Budaca

Triaxiality and state-dependent shape properties of Xe isotopes

NUCLEAR STRUCTURE ^{118,120,122,124,126,128}Xe; calculated levels, J, π of ground-state band, γ and β bands, staggering parameter, three-phonon 0+ states, B(E2) for intra- and inter-band quadrupole transitions, potential energy surfaces (PES) in (β₂, γ) plane, β₂ deformation for ground states, effective potentials for β₂ deformations. Phenomenological Bohr model with an exactly separable collective potential. Comparison with experimental data.

doi: 10.1103/PhysRevC.101.064318
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2020BU17      Chin.Phys.C 44, 124102 (2020)

R.Budaca, A.I.Budaca

Alpha decay of heavy and super heavy nuclei with a generalized electrostatic potential

RADIOACTIVITY ^{186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219}Po, ^{191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219}At, ^{194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222}Rn, ^{200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222}Fr, ^{202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226}Ra, ^{202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227}Ac, ^{208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232}Th, ^{216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238}U(α); calculated T_1/2 using WKB theory applied for a phenomenological potential barrier composed of a centrifugal contribution and a screened electrostatic interaction represented by a Hulthen potential. Comparison with available data.

doi: 10.1088/1674-1137/abb4cf
Citations: PlumX Metrics

2019BU16      Nucl.Phys. A990, 137 (2019)

R.Budaca, P.Buganu, A.I.Budaca

Geometrical model description of shape coexistence in Se isotopes

doi: 10.1016/j.nuclphysa.2019.07.006
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2019BU27      J.Phys.(London) G46, 125102 (2019)

R.Budaca, A.I.Budaca, P.Buganu

Application of the Bohr Hamiltonian with a double-well sextic potential to collective states in Mo isotopes

NUCLEAR STRUCTURE ^96,98,100Mo; calculated B(Eλ), energy levels, J, π; deduced collective potentials. Comparison with available data.

doi: 10.1088/1361-6471/ab4498
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2017BU11      Phys.Scr. 92, 084001 (2017)

A.I.Budaca, R.Budaca

Energy-dependent collective excitations in Os and Pt isotopes

NUCLEAR STRUCTURE ^{172,174,176,178,180,182,184,186,188,190,192}Os, ^{180,182,184,186,188,190,192,194,196}Pt; calculated B(E2), energy ratios and the excited band heads. Comparison with available data.

doi: 10.1088/1402-4896/aa6dab
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2017BU14      Eur.Phys.J. A 53, 160 (2017)

R.Budaca, A.I.Budaca

Proton emission with a screened electrostatic barrier

RADIOACTIVITY ¹⁰⁵Sb, ¹⁰⁹I, ^112,113Cs, ^130,131Eu, ¹³⁵Tb, ^140,141Ho, ^145,146,147Tm, ^150,151Lu, ^156,157Ta, ^159,160,161Re, ^{164,165,166,167}Ir, ^170,171Au, ^176,177Tl, ¹⁸⁵Bi(p); calculated T_1/2 using WKB-based with centrifugal and overlapping effects in addition to electrostatic repulsion. Compared with data and with other calculations.

doi: 10.1140/epja/i2017-12352-0
Citations: PlumX Metrics

2016BU11      Nucl.Phys. A951, 60 (2016)

A.I.Budaca, R.Budaca, I.Silisteanu

Extended systematics of alpha decay half lives for exotic superheavy nuclei

COMPILATION Z=102-118(α); compiled T_1/2; deduced Q, T_1/2 systematics. Compared to data.

doi: 10.1016/j.nuclphysa.2016.03.048
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2016BU25      Phys.Rev. C 94, 054306 (2016)

R.Budaca, A.I.Budaca

Shape phase mixing in critical point nuclei

NUCLEAR STRUCTURE ¹⁴⁸Ce, ¹⁵⁰Nd, ¹⁵⁶Dy, ¹⁵⁸Er, ^{174,176,178,180}Os, ^{178,180,182,184}Pt; calculated energy levels for the ground, γ, and the first two β bands, J, π, B(E2), ground state deformation parameters using Bohr-Mottelson model. Comparisons with experimental values taken from evaluated data in NDS publications.

doi: 10.1103/PhysRevC.94.054306
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2015BU09      J.Phys.(London) G42, 085103 (2015)

R.Budaca, A.I.Budaca

Conjunction of γ-rigid and γ-stable collective motions in the critical point of the phase transition from spherical to deformed nuclear shapes

NUCLEAR STRUCTURE ¹⁶⁰Gd, ¹⁶²Dy, ¹⁶⁶Er; calculated energy levels, J, π, B(E2). Comparison with available data.

doi: 10.1088/0954-3899/42/8/085103
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2015BU12      Eur.Phys.J. A 51, 126 (2015)

R.Budaca, A.I.Budaca

Competing γ-rigid and γ-stable vibrations in neutron-rich Gd and Dy isotopes

NUCLEAR STRUCTURE ^158,160,162Gd, ^160,162,164Dy; calculated levels, J, π, deformation, rotational bands, B(E2), coupling between two types of collective motion, rigidity parameter using exactly separable version of Bohr Hamiltonian. Compared with data.

doi: 10.1140/epja/i2015-15126-8
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2013BU19      Phys.Rev. C 88, 044618 (2013)

A.I.Budaca, I.Silisteanu

Systematic study of α-decay properties of superheavy nuclei

RADIOACTIVITY ^{251,253,254,255,256,257,259}No, ^{254,255,256,257,258,259,260}Lr, ^{255,257,259,261}Rf, ^{256,257,258,259,260,261,262,263}Db, ^{259,260,261,263,265,266,269,271}Sg, ^{262,264,266,267,270,271,272,274}Bh, ^{263,264,265,266,267,269,270,271,273,275}Hs, ^{266,268,270,274,275,276,278}Mt, ^{267,269,270,271,273,277,279,281}Ds, ^{272,274,278,279,280,282}Rg, ^{277,281,283,285}Cn, ^{278,282,283,284,285,286}Nh, ^{286,287,288,289}Fl, ^{287,288,289,290}Mc, ^{290,291,292,293}Lv, ^293,294Ts, ^294,295Og, ^298,299120(α); calculated half-lives for superheavy nuclei (SHN). Shell-model rate theory with α clustering and resonance scattering amplitudes given by self-consistent models for nuclear structure and reaction dynamics. Brown relationship for α-decay half-life and Q(α). Simple fit formulas proposed for α-decay half-lives. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.044618
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2013SI04      At.Data Nucl.Data Tables 98, 1096 (2013)

I.Silisteanu, A.I.Budaca

Structure and α-decay properties of the heaviest nuclei

NUCLEAR STRUCTURE Z=102-120; calculated T_1/2; deduced Brown systematics. Microscopic shell model.

doi: 10.1016/j.adt.2011.12.007
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2013SI27      Rom.J.Phys. 58, 1198 (2013)

I.Silisteanu, A.I.Budaca

Study of α-Radioactivity of Superheavy Nuclei

RADIOACTIVITY ^{267,269,270,271,273,277,279,281}Ds(α); calculated T_1/2. Shell model, comparison with experimental data.

2012BU12      J.Phys.:Conf.Ser. 337, 012022 (2012)

A.-I.Budaca, I.Silisteanu

Study of α-Decay Properties of Superheavy Nuclei

RADIOACTIVITY Z=102-118, 120(α); compiled T_1/2; deduced systematics.

doi: 10.1088/1742-6596/337/1/012022
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2012SI02      Rom.J.Phys. 57, 493 (2012)

I.Silisteanu, A.I.Budaca

Alpha-Decay Data of Superheavy Nuclei as a Source of Information about Nuclear States

RADIOACTIVITY ²⁸⁶Fl, ²⁸¹Cn, ²⁷⁷Ds, ²⁷³Hs, ²⁶⁹Sg, ²⁸²Nh, ²⁷⁸Rg, ²⁷⁴Mt, ²⁷⁰Bh(α); calculated T_1/2. Comparison with experimental data.

2010SI27      Rom.J.Phys. 55, 1088 (2010)

I.Silisteanu, A.I.Budaca, A.O.Silisteanu

Systematics of α-Decay Half-Lives of the Heaviest Elements

RADIOACTIVITY ^{253,254,255,256,257,259}No, ^{254,255,256,257,258,259,260}Lr, ^{255,256,257,258,259,260,261}Rf, ^{256,257,258,259,260,261,262,263}Db, ^{259,260,261,263,265,266,271}Sg, ^{261,262,264,266,267,272,274}Bh, ^{264,265,266,267,269,270}Hs, ^{266,268,270,275,276,278}Mt, ^{267,269,270,271,273,279}Ds, ^{272,274,279,280,282}Rg, ^277,283,285Cn, ^{278,283,284,285,286}Nh, ^{286,287,288,289}Fl, ^{287,288,289,290}Mc, ^{290,291,292,293}Lv, ^293,294Ts, ^294,295Og, ^298,299120(α); calculated T_1/2. Comparison with experimental data.