NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = M.Sambataro Found 47 matches. 2024PO05 Nuovo Cim. C 47, 45 (2024) T.Popa, N.Sandulescu, M.Sambataro Pair condensation in the excited states of nuclei NUCLEAR STRUCTURE 108Sn; calculated properties of the low-lying excited states of neutrons or protons interacting by pairing forces are usually described by breaking a pair from the ground state pair condensate and replacing it with an excited pair, occupation probabilities of single-particle orbits in the framework of the particle-number projected-BCS (PBCS) approach.
doi: 10.1393/ncc/i2024-24045-8
2024SA22 Nuovo Cim. C 47, 42 (2024) Spectra of N=Z nuclei in a formalism of quartets NUCLEAR STRUCTURE 24Mg, 28Si, 48Cr; calculated energy levels, J, π in a formalism of quartets, quartets are α-like four-body structures characterized by an isospin T=0. Comparison with available data.
doi: 10.1393/ncc/i2024-24042-y
2023PO01 Phys.Rev. C 107, 034318 (2023) T.Popa, N.Sandulescu, M.Sambataro Excited states of zero seniority based on a pair condensate NUCLEAR STRUCTURE 108Sn; calculated energy levels with J=0, J, π, occupation probabilities of single-particle states. Investigated the properties of excited states of zero seniority generated from the ground-state pair condensate. Comparison to experimental data.
doi: 10.1103/PhysRevC.107.034318
2023SA15 Eur.Phys.J. A 59, 87 (2023) Intrinsic quartet states and band-like structures in N = Z nuclei NUCLEAR STRUCTURE 24Mg, 28Si, 48Cr; analyzed available data; deduced level energies, J, π, the emergence of band-like structures in N=Z nuclei in terms of quartet-based intrinsic states.
doi: 10.1140/epja/s10050-023-01003-w
2023SA28 Nucl.Phys. A1036, 122675 (2023) M.Sambataro, N.Sandulescu, D.Gambacurta Coexistence of quartets and pairs in even-even N>Z nuclei NUCLEAR STRUCTURE 22,24,26,28Ne, 24,26,28,30Mg, 28,30,32Si, 46,48,50,52Ti, 48,50,52,54Cr; analyzed the structure of the ground states of even-even nuclei; deduced occupation probabilities of the single-particle orbits, description of the ground states of these nuclei as a product of two terms, one representing the proton-neutron subsystem with an equal number of protons and neutrons and the other one associated with the excess neutrons.
doi: 10.1016/j.nuclphysa.2023.122675
2022SA38 Phys.Lett. B 827, 136987 (2022) Band-like structures and quartets in deformed N = Z nuclei NUCLEAR STRUCTURE 24Mg, 28Si, 48Cr; calculated energy levels, J, π using the formalism of α-like quartets. Comparison with available data.
doi: 10.1016/j.physletb.2022.136987
2021SA60 Phys.Lett. B 820, 136476 (2021) α-Like quartetting in the excited states of proton-neutron pairing Hamiltonians NUCLEAR STRUCTURE 28Si; calculated energy levels, J, π using the quartet condensation model (QCM). Comparison with available data.
doi: 10.1016/j.physletb.2021.136476
2020SA50 J.Phys.(London) G47, 045112 (2020) Exact T = 0 eigenstates of the isovector pairing Hamiltonian
doi: 10.1088/1361-6471/ab6ee2
2018SA50 Phys.Lett. B 786, 11 (2018) Quartet structure of N=Z nuclei in a boson formalism: The case of 28Si NUCLEAR STRUCTURE 28Si; calculated energy levels, J, π, potential energy surfaces, B(E2). Comparison with experimental data.
doi: 10.1016/j.physletb.2018.09.011
2017SA13 Eur.Phys.J. A 53, 47 (2017) Quartet correlations in N = Z nuclei induced by realistic two-body interactions NUCLEAR STRUCTURE 20Ne, 24Mg, 28Si, 32S; calculated total energy, binding energy, correlation energy, mass excess using gs correlations in terms of condensate of α-like quartets. Compared with other calculations.
doi: 10.1140/epja/i2017-12240-7
2016GA04 Phys.Rev. C 93, 024309 (2016) D.Gambacurta, F.Catara, M.Grasso, M.Sambataro, M.V.Andres, E.G.Lanza Nuclear excitations as coupled one and two random-phase-approximation modes NUCLEAR STRUCTURE 16O; calculated low-lying levels and giant resonances (dipole, quadrupole and octupole), J, π, monopole (E0), dipole (E1), isoscalar quadrupole (E2), and isoscalar octupole (E3) response functions. Double random-phase approximation (DRPA) method to include two -particle two-hole (2p-2h) configurations and by coupling them with the 1p-1h ones and among themselves. Comparison with experimental values.
doi: 10.1103/PhysRevC.93.024309
2016SA22 Phys.Rev. C 93, 054320 (2016) Isoscalar-isovector proton-neutron pairing and quartet condensation in N=Z nuclei NUCLEAR STRUCTURE 20Ne, 24Mg, 28Si, 44Ti, 48Cr, 52Fe, 104Te, 108Xe, 112Ba; calculated ground-state correlation energies, isovector (T=1) and isoscalar (T=0) pairing energies for N=Z nuclei using alpha-like quartet condensation model (QCM); deduced coexistence of isovector and isoscalar proton-neutron pairing correlations. Comparison of calculations with various pairing Hamiltonians.
doi: 10.1103/PhysRevC.93.054320
2015SA23 Phys.Rev. C 91, 064318 (2015) Quarteting and spin-aligned proton-neutron pairs in heavy N=Z nuclei NUCLEAR STRUCTURE 92Pd, 96Cd; calculated levels, J, π, B(E2), squared overlaps between the QM low-lying yrast states and the corresponding eigenstates in the various QM approximations; deduced role of maximally aligned isoscalar pairs in heavy N=Z nuclei, in particular for J=9, using quartet model (QM).
doi: 10.1103/PhysRevC.91.064318
2015SA24 Rom.J.Phys. 60, 799 (2015) M.Sambataro, N.Sandulescu, C.W.Johnson Proton-Neutron Pairing in Self-Conjugate Nuclei in a Formalism of Quartets NUCLEAR STRUCTURE 20Ne, 24Mg, 28Si, 32S, 44Ti, 48Cr, 52Fe, 104Te, 108Xe, 112Ba; calculated ground state correlation energies.
2015SA34 Phys.Rev.Lett. 15, 112501 (2015) Four-Body Correlations in Nuclei NUCLEAR STRUCTURE 20Ne, 20F, 20O, 24Mg, 28Si, 92Pd; calculated energy levels, J, π, low-energy yrast spectra. Quartet and shell model approaches.
doi: 10.1103/PhysRevLett.115.112501
2015SA54 Phys.Lett. B 740, 137 (2015) M.Sambataro, N.Sandulescu, C.W.Johnson Isoscalar and isovector pairing in a formalism of quartets NUCLEAR STRUCTURE 16O, 40Ca, 100Sn, 20Ne, 24Mg, 28Si, 44Ti, 48Cr, 52Fe, 104Te, 108Xe, 112Ba; calculated ground state correlation energies for the isovector plus isoscalar pairing Hamiltonian in even-even N=Z nuclei in a formalism of alpha-like quartets. Comparison with available data.
doi: 10.1016/j.physletb.2014.11.036
2013SA60 Phys.Rev. C 88, 061303 (2013) Isovector pairing in a formalism of quartets for N=Z nuclei NUCLEAR STRUCTURE 20Ne, 24Mg, 28Si, 32S, 44Ti, 48Cr, 52Fe, 104Te, 108Xe, 112Ba; calculated ground-state correlation energies for spherical, and axially deformed single-particle states using pairing and isovector pairing force in N=Z nuclei. Quartet model (QM), and quartet condensation model (QCM).
doi: 10.1103/PhysRevC.88.061303
2012SA25 Phys.Rev. C 85, 064326 (2012) Multipair approach to pairing in nuclei NUCLEAR STRUCTURE 112,114,116,118Sn; calculated ground-state correlation energies as a function of pairing strength, occupation numbers, and pair transfer matrix elements by constructing pairing Hamiltonian for a finite nuclear system as a product of collective, real, and distinct pairs. Comparison with BCS and projected BCS (PBCS) calculations.
doi: 10.1103/PhysRevC.85.064326
2007SA32 Phys.Rev. C 75, 054314 (2007) Pair condensation in a finite Fermi system
doi: 10.1103/PhysRevC.75.054314
2006GA02 Phys.Rev. C 73, 014310 (2006) D.Gambacurta, M.Sambataro, F.Catara Solvable many-level pairing model in a boson formalism
doi: 10.1103/PhysRevC.73.014310
2006GA09 Phys.Rev. C 73, 024319 (2006) D.Gambacurta, M.Grasso, F.Catara, M.Sambataro Extension of the second random-phase approximation
doi: 10.1103/PhysRevC.73.024319
2004GA47 Yad.Fiz. 67, 1804 (2004); Phys.Atomic Nuclei 67, 1776 (2004) Pairing Correlations in Finite Nuclear Systems
doi: 10.1134/1.1811177
2003SA05 Nucl.Phys. A714, 463 (2003) RPA-like calculations within limited particle-hole spaces
doi: 10.1016/S0375-9474(02)01372-6
2002GR30 Phys.Rev. C 66, 064303 (2002) M.Grasso, F.Catara, M.Sambataro Boson-mapping-based extension of the random-phase approximation in a three-level Lipkin model
doi: 10.1103/PhysRevC.66.064303
2002SA27 Czech.J.Phys. 52, 505 (2002) Testing a New Class of Phonon Operators for RPA-Like Calculations within an Exactly Solvable Model
doi: 10.1023/A:1015305226107
2001SA43 Yad.Fiz. 64, No 6, 1139 (2001); Phys.Atomic Nuclei 64, 1064 (2001) Analysis of the SU(3) Model in Multistep Variational Approach
doi: 10.1134/1.1383618
2000KW01 Acta Phys.Pol. B31, 2029 (2000) E.Kwasniewicz, F.Catara, M.Sambataro Description of A = 22 Nuclei in the Collective Pair Approximation NUCLEAR STRUCTURE A=22; calculated levels, J. Collective pair approximation.
1999SA07 Phys.Rev. C59, 1422 (1999) Variational Approach to Collective Excitations
doi: 10.1103/PhysRevC.59.1422
1999SA11 Phys.Rev. C59, 2056 (1999) β- and Double-β-decay Transitions in a Schematic Model
doi: 10.1103/PhysRevC.59.2056
1999SA56 Phys.Rev. C60, 064320 (1999) Many-Body Correlations in Multistep Variational Approach
doi: 10.1103/PhysRevC.60.064320
1998SA53 Europhys.Lett. 44, 173 (1998) On the Interdependence between Ground and One-Phonon RPA States
doi: 10.1209/epl/i1998-00453-y
1997KW02 Acta Phys.Pol. B28, 1249 (1997) E.Kwasniewicz, F.Catara, M.Sambataro The Structure of 1s0d- 1p0f-Shell Nuclei in the Collective Pair Approximation NUCLEAR STRUCTURE 20Ne; calculated levels; deduced shell model truncation effects. Collective pair approximation.
1997KW03 J.Phys.(London) G23, 911 (1997) E.Kwasniewicz, F.Catara, M.Sambataro Structure of Odd-A 1s0d- and 1p0f-Shell Nuclei in the Collective Pair Approximation NUCLEAR STRUCTURE A=19; A=21; A=43; calculated levels. Collective pair approximation, shell model comparison.
doi: 10.1088/0954-3899/23/8/006
1997SA30 Phys.Rev. C56, 782 (1997) Quasiparticle Random-Phase Approximation and β-Decay Physics: Higher-order approximations in a boson formalism
doi: 10.1103/PhysRevC.56.782
1995SA26 Phys.Rev. C51, 3066 (1995) Extended Random-Phase Approximation in a Boson Formalism with Pauli Principle
doi: 10.1103/PhysRevC.51.3066
1995SA51 Phys.Rev. C52, 3378 (1995) Baryon Mapping of Quark Systems
doi: 10.1103/PhysRevC.52.3378
1994CA28 Nucl.Phys. A579, 1 (1994) F.Catara, N.Dinh Dang, M.Sambataro Ground-State Correlations Beyond RPA NUCLEAR STRUCTURE 208Pb, 146Gd; calculated levels, B(λ), EWSR. Ground state correlations beyond RPA.
doi: 10.1016/0375-9474(94)90790-0
1992CA22 Phys.Rev. C46, 754 (1992) Quark Distributions in Nuclei NUCLEAR STRUCTURE 4He, 16O, 40Ca; calculated quark distribution; deduced short range correlations role in quark density.
doi: 10.1103/PhysRevC.46.754
1991GA25 Europhys.Lett. 16, 711 (1991) Y.Y.Gao, F.Catara, M.Sambataro, A.Vitturi Study of Negative-Parity States in Near-Closed-Shell Nuclei in the Collective-Pair Approximation Including Particle-Hole Excitations NUCLEAR STRUCTURE 18O; calculated levels; deduced (particle-particle)-, (particle-hole)- degrees of freedom role in octupole states. Collective pair approximation.
1984ME04 Phys.Rev. C29, 1839 (1984) R.A.Meyer, J.Lin, G.Molnar, B.Fazekas, A.Veres, M.Sambataro Influence of Cross Subshell Excitations on the Collective States of 98Mo Observed by β Decay and (n, n'γ) Reaction Spectroscopy RADIOACTIVITY 98mNb(β-) [from 98Mo(n, p), E=14 MeV]; measured Eγ, Iγ, γγ(t), γγ-coin; deduced log ft. 98Mo deduced levels, J, π, γ-branching, Iβ, absolute Iγ, δ. Compton suppression. NUCLEAR REACTIONS 98Mo(n, n'γ), E=14 MeV; measured γ(θ), Eγ, Iγ, γγ-coin, γγ(θ). 98Mo deduced levels, δ, J, π. Enriched target. NUCLEAR STRUCTURE 98Mo; calculated levels, γ-branching ratios, cross subshell excitations. Interacting boson model.
doi: 10.1103/PhysRevC.29.1839
1984SA16 Nucl.Phys. A423, 333 (1984) M.Sambataro, O.Scholten, A.E.L.Dieperink, G.Piccitto On Magnetic Dipole Properties in the Neutron-Proton IBA Model NUCLEAR STRUCTURE 144,146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176Ba, 146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178Ce, 148,150,152,154,156,160,162,164,166,168,170,172,174,176,178,180Nd, 150,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180,182Sm, 152,154,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184Gd, 154,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184,186Dy, 156,158,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188Er, 158,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190Yb, 160,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192Hf, 162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194W, 164,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196Os, 166,168,170,172,178,180,182,184,186,188,190,192,194W, 164,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196,198Pt; calculated 2+ state g. 152Sm; calculated δ(E2/M1). Neutron-proton interacting boson model.
doi: 10.1016/0375-9474(84)90593-1
1984VA14 Nucl.Phys. A422, 61 (1984) A.M.Van Den Berg, R.Bijker, N.Blasi, M.Sambataro, R.H.Siemssen, W.A.Sterrenburg Study of 96,98,100Mo with the Ru(d, 6Li)Mo Reaction at E(d) = 45 MeV NUCLEAR REACTIONS 100,102,104Ru(d, 6Li), E=45 MeV; measured σ(E(6Li), θ). 96,98,100Mo levels deduced Sα, J, π. DWBA analysis, interacting boson approximation calculations, shell model wave functions. Magnetic spectrograph, enriched targets.
doi: 10.1016/0375-9474(84)90431-7
1983MO11 Nucl.Phys. A403, 342 (1983) G.Molnar, I.Dioszegi, A.Veres, M.Sambataro Level and Decay Schemes of 100Mo from (n, n'γ) Reaction Spectroscopy NUCLEAR REACTIONS 100Mo(n, n'γ), E=fast; measured Eγ, Iγ, γ(θ). 100Mo deduced levels, J, π, δ. Enriched target, Ge(Li) detector. Interacting boson model calculations.
doi: 10.1016/0375-9474(83)90231-2
1982HE05 Phys.Rev. C25, 3160 (1982) K.Heyde, P.Van Isacker, M.Waroquier, G.Wenes, M.Sambataro Description of the Low-Lying Levels in 112,114Cd NUCLEAR STRUCTURE 112,114Cd; calculated levels, B(λ), T1/2, γ-branching. Interacting boson approximation, two-particle, two-hole excitations.
doi: 10.1103/PhysRevC.25.3160
1982SA02 Nucl.Phys. A376, 201 (1982) Configuration Mixing in Mo Isotopes NUCLEAR STRUCTURE 96,98,100,102,104Mo; calculated levels, B(E2), quadrupole moments. Neutron, proton interacting boson model.
doi: 10.1016/0375-9474(82)90060-4
1982SA13 Nucl.Phys. A380, 365 (1982) A Study of Cd and Te Isotopes in the Interacting Boson Approximation NUCLEAR STRUCTURE 102,104,106,108,110,112,114,116,118,120,122,126Cd; 106,114,116,118,120,122,124,126,128,130,132Te; calculated levels, B(E2), quadrupole moment, two neutron separation energies, γ-branching. Interacting boson model.
doi: 10.1016/0375-9474(82)90565-6
1981SA38 Phys.Lett. 107B, 249 (1981) G-Factors in the Neutron-Proton Interacting Boson Approximation NUCLEAR STRUCTURE Ru, Pd, Cd, Ba, Xe, Te; calculated 2+ state g vs neutron number. Proton-neutron interacting boson approximation.
doi: 10.1016/0370-2693(81)90822-4
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