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NSR database version of April 11, 2024.

Search: Author = S.Pittel

Found 88 matches.

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2020LE12      Phys.Rev. C 102, 024310 (2020)

Y.Lei, H.Jiang, S.Pittel

Variational approach for pair optimization in the nucleon pair approximation

NUCLEAR STRUCTURE 132,134,136Ba; calculated levels, J, π, potential energy surfaces, deformation parameters, collective-pair weights of the optimized collective-pair condensates, yrast bands, quasi-β, quasi-γ bands, B(E2) using pair-condensate variational approach (PCV) for nucleon-pair approximation (NPA) based methods. Comparison with experimental data.

doi: 10.1103/PhysRevC.102.024310
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2016DU09      Phys.Rev. C 93, 034313 (2016)

J.Dukelsky, S.Pittel, C.Esebbag

Structure of the number-projected BCS wave function

doi: 10.1103/PhysRevC.93.034313
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2016QI06      Phys.Rev. C 94, 024301 (2016)

Z.Z.Qin, Y.Lei, S.Pittel

Global correlations between electromagnetic and spectroscopic properties of collective 2+1 and 2+2 states

NUCLEAR STRUCTURE 80Kr, 86Sr, 92Zr, 132Xe, 150,152Sm, 160,162,164Dy, 166,168Er, 184,186W, 188,190,192Os, 192,194,196,198Pt; A=10-240; analyzed systematic correlations between excitation energies, magnetic and quadrupole moments, and E2 collectivity for the lowest two 2+ states in even-even nuclei across the whole chart of nuclides, with experimental data taken from the ENSDF database. Triaxial rotor (TRM) and anharmonic-vibrator (AHV) model analysis.

doi: 10.1103/PhysRevC.94.024301
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2015LE08      Phys.Rev. C 92, 024321 (2015)

Y.Lei, H.Jiang, S.Pittel

Phase change near N=70 in the wave function of the Iπ=11/2- isomers along the cadmium-isotope chain

NUCLEAR STRUCTURE 111,113,115,117,119,121,123,125,127Cd; calculated B(E2) and quadrupole moments for 11/2- isomers using optimized shell-model wave functions. Comparison with experimental data.

doi: 10.1103/PhysRevC.92.024321
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2013FU03      Phys.Rev. C 87, 044310 (2013)

G.J.Fu, Y.Lei, Y.M.Zhao, S.Pittel, A.Arima

Nucleon-pair approximation of the shell model with isospin symmetry

doi: 10.1103/PhysRevC.87.044310
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2013PI08      J.Phys.:Conf.Ser. 445, 012031 (2013)

S.Pittel, Y.Lei, G.J.Fu, Y.M.Zhao

Spherical to deformed shape transitions in the nucleon pair shell model

NUCLEAR STRUCTURE 142,144,146,148Ce; calculated levels, J, π, deformation, deformation energy, binding energy using nucleon-pair approximation of the shell model. Compared with available data.

doi: 10.1088/1742-6596/445/1/012031
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2012LE21      J.Phys.:Conf.Ser. 381, 012107 (2012)

Y.Lei, S.Pittel, N.Sandulescu, A.Poves, B.Thakur, Y.M.Zhao

Systematic study of proton-neutron pairing correlations in the nuclear shell model

NUCLEAR STRUCTURE 44,46Ti, 48Cr; calculated levels, J, π, rotational ground-state band, mass excess. 48Cr calculated yrast band. Shell model including deformation, spin-orbit effects, isoscalar, isovector pairing. Compared to available data.

doi: 10.1088/1742-6596/381/1/012107
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2012LE22      J.Phys.:Conf.Ser. 387, 012018 (2012)

Y.Lei, S.Pittel, N.Sandulescu, A.Poves, B.Thakur, Y.M.Zhao

Systematic study of isoscalar and isovector pairing in the 2p1f shell

NUCLEAR STRUCTURE 44,46Ti, 48Cr; calculated levels, J, π, mass excess, ground band, yrast, yrare bands with isovector, isoscalar and SU(4) pairing. Levels compared with data.

doi: 10.1088/1742-6596/387/1/012018
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2011LE07      Phys.Rev. C 83, 024302 (2011)

Y.Lei, Z.Y.Xu, Y.M.Zhao, S.Pittel, A.Arima

Emergence of generalized seniority in low-lying states with random interactions

NUCLEAR STRUCTURE 22O, 46Ca; calculated generalized seniority properties of the low-lying spin 0, 2 and 4 states using one and two body random interactions. S-pair correlation structure including two-body random ensemble (TBRE) and random Quasi-particle ensemble (RQE).

doi: 10.1103/PhysRevC.83.024302
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2011LE27      Phys.Rev. C 84, 044318 (2011)

Y.Lei, S.Pittel, N.Sandulescu, A.Poves, B.Thakur, Y.M.Zhao

Systematic study of proton-neutron pairing correlations in the nuclear shell model

NUCLEAR STRUCTURE 42Sc, 44,45,46Ti, 46V, 48Cr; calculated level energies, energy splittings, yrast and yrare bands, E2 transition matrix elements, proton-neutron pairing modes, isoscalar and isovector pairs. Parameterized Hamiltonian, shell-model framework. Comparison with experimental data.

doi: 10.1103/PhysRevC.84.044318
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2011PI02      Acta Phys.Pol. B42, 427 (2011)

S.Pittel, B.Thakur

The Density Matrix Renormalization Group and the Nuclear Shell Model

NUCLEAR STRUCTURE 47,48,49,50Cr, 51,52Fe, 55,56Ni; Calculated energies of the lowest excited state, J, π. GXPF1A interaction.

doi: 10.5506/APhysPolB.42.427
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2010FU10      Phys.Rev. C 82, 034304 (2010)

G.J.Fu, H.Jiang, Y.M.Zhao, S.Pittel, A.Arima

Nuclear binding energies and empirical proton-neutron interactions

ATOMIC MASSES Z=24-102, N=30-160; calculated binding energies and atomic masses using a local mass formula derived from exponential function to simulate the residual proton-neutron interactions. Comparison with AME-2003 mass evaluation.

doi: 10.1103/PhysRevC.82.034304
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2008BA17      Phys.Rev. C 77, 041304 (2008)

J.Barea, A.Frank, J.G.Hirsch, P.Van Isacker, S.Pittel, V.Velazquez

Garvey-Kelson relations and the new nuclear mass tables

NUCLEAR STRUCTURE Z=5-100, N=8-270; deduced Garvey-Kelson mass relations. Finite-range liquid-drop model (FRDM), Duflo-Zuker(DZ) model, and Hartree-Fock-Bogoliubov model. Comparison with evaluated masses.

doi: 10.1103/PhysRevC.77.041304
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2008HI20      Int.J.Mod.Phys. E17, Supplement 1, 398 (2008)

J.G.Hirsch, I.Morales, J.Mendoza-Temis, A.Frank, J.C.Lopez-Vieyra, J.Barea, S.Pittel, P.van Isacker, V.Velazquez

The art of predicting nuclear masses

doi: 10.1142/S0218301308012014
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2008PI07      Int.J.Mod.Phys. E17, Supplement 1, 122 (2008)

S.Pittel, B.Thakur, N.Sandulescu

The density matrix renormalization group and the nuclear shell model

NUCLEAR STRUCTURE 48Cr, 56Ni; calculated ground state energy, lowest excited state energies, J, π.

doi: 10.1142/S021830130801180X
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2008TH06      Phys.Rev. C 78, 041303 (2008)

B.Thakur, S.Pittel, N.Sandulescu

Density matrix renormalization group study of 48Cr and 56Ni

NUCLEAR STRUCTURE 48Cr, 56Ni; calculated energies of ground state and low-lying excited states. Density Matrix Renormalization Group Method.

doi: 10.1103/PhysRevC.78.041303
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2007DU06      Int.J.Mod.Phys. E16, 210 (2007)

J.Dukelsky, B.Errea, S.H.Lerma, S.Pittel

Exactly solvable pairing Hamiltonians

doi: 10.1142/S0218301307005545
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2007DU16      Phys.Rev. C 76, 011302 (2007)

G.G.Dussel, S.Pittel, J.Dukelsky, P.Sarriguren

Cooper pairs in atomic nuclei

doi: 10.1103/PhysRevC.76.011302
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2006DU16      Int.J.Mod.Phys. E15, 1665 (2006)

J.Dukelsky, S.H.Lerma, B.Errea, S.Pittel, S.Dimitrova, V.G.Gueorguiev, P.van Isacker

Rank-two Richardson-Gaudin models

NUCLEAR STRUCTURE 64Ge; calculated pair energies.

doi: 10.1142/S0218301306005289
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2006LE30      Phys.Rev. C 74, 024314 (2006)

S.H.Lerma, B.Errea, J.Dukelsky, S.Pittel, P.Van Isacker

Exactly solvable models of proton and neutron interacting bosons

doi: 10.1103/PhysRevC.74.024314
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2006PI02      Phys.Rev. C 73, 014301 (2006)

S.Pittel, N.Sandulescu

Density matrix renormalization group and the nuclear shell model

NUCLEAR STRUCTURE 48Cr; calculated ground and excited states energies. Density matrix renormalization group method.

doi: 10.1103/PhysRevC.73.014301
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2006PI13      Phys.Scr. T125, 91 (2006)

S.Pittel, J.Dukelsky

Exactly solvable Richardson-Gaudin models and their applications

NUCLEAR STRUCTURE 114,115,116Sn; calculated pairing correlations, related features.

doi: 10.1088/0031-8949/2006/T125/020
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2004DU03      Rep.Prog.Phys. 67, 513 (2004)

J.Dukelsky, S.Pittel

The density matrix renormalization group for finite fermi systems

doi: 10.1088/0034-4885/67/4/R02
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2003ST22      Phys.Rev. C 68, 054312 (2003)

M.V.Stoitsov, J.Dobaczewski, W.Nazarewicz, S.Pittel, D.J.Dean

Systematic study of deformed nuclei at the drip lines and beyond

NUCLEAR STRUCTURE 4He, 6Be, 10C, 14O, 18Ne, 20Mg, 24Si, 28S, 32Ar, 36Ca, 40Ti, 44Cr, 46Fe, 52Ni, 56Zn, 60Ge, 64Se, 70Kr, 72Sr, 76Zr, 82Mo, 86Ru, 90Pd, 94Cd, 102Sn, 108Te, 112Xe, 116Ba, 118Ce, 124Nd, 130Sm, 134Gd, 138Dy, 144Er, 148Yb, 152Hf, 158W, 162Os, 168Pt, 172Hg, 182Pb; calculated deformations, two-proton separation energies, pair gaps. 8He, 12Be, 22C, 26O, 34Ne, 42Mg, 46Si, 52S, 58Ar, 68Ca, 72Ti, 80Cr, 84Fe, 88Ni, 100Zn, 108Ge, 114Se, 118Kr, 120Sr, 124Zr, 132Mo, 142Ru, 150Pd, 168Cd, 174Sn, 176Te, 178Xe, 182Ba, 186Ce, 188Nd, 204Sm, 208Gd, 216Dy, 222Er, 230Yb, 254Hf, 256W, 258Os, 260Pt, 262Hg, 266Pb; calculated deformations, two-neutron separation energies, pair gaps. 30,32,34Ne, 38,40,42Mg, 48,50,52S, 96,98,100Zn; calculated binding energy vs deformation. HFB calculations, transformed harmonic-oscillator basis.

doi: 10.1103/PhysRevC.68.054312
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2002DU05      Phys.Rev.Lett. 88, 062501 (2002)

J.Dukelsky, C.Esebbag, S.Pittel

Electrostatic Mapping of Nuclear Pairing

NUCLEAR STRUCTURE 114,116Sn; calculated nucleon pairing properties, orbital occupation probabilities. Mapping of nuclear pairing to classical electrostatic system.

doi: 10.1103/PhysRevLett.88.062501
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2002DU13      Phys.Rev. C65, 054319 (2002)

J.Dukelsky, S.Pittel, S.S.Dimitrova, M.V.Stoitsov

Density Matrix Renormalization Group Method and Large-Scale Nuclear Shell-Model Calculations

doi: 10.1103/PhysRevC.65.054319
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2002MO15      Phys.Rev. C65, 044322 (2002)

O.Monnoye, S.Pittel, J.Engel, J.R.Bennett, P.Van Isacker

Odd-Mass Nickel Isotopes in a Generalized-Seniority Approach

NUCLEAR STRUCTURE 57,59,61,63,65,67,69Ni; calculated levels, J, π, μ. 66Co, 69Cu; calculated levels, J, π. Comparisons with data. Generalized seniority approximation.

doi: 10.1103/PhysRevC.65.044322
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2002ZH38      Phys.Rev. C66, 041301 (2002)

Y.M.Zhao, S.Pittel, R.Bijker, A.Frank, A.Arima

Generic rotation in a collective SD nucleon-pair subspace

doi: 10.1103/PhysRevC.66.041301
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2001DU07      Phys.Rev.Lett. 86, 4791 (2001)

J.Dukelsky, S.Pittel

New Mechanism for the Enhancement of sd Dominance in Interacting Boson Models

doi: 10.1103/PhysRevLett.86.4791
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2001DU08      Phys.Rev. C63, 061303 (2001)

J.Dukelsky, S.Pittel

New Approach to Large-Scale Nuclear Structure Calculations

doi: 10.1103/PhysRevC.63.061303
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2001PI11      Yad.Fiz. 64, No 6, 1130 (2001); Phys.Atomic Nuclei 64, 1055 (2001)

S.Pittel, M.V.Stoitsov

An Improved Single-Particle Basis for Nuclear Structure Studies Far from Stability

NUCLEAR STRUCTURE 28O; calculated energy, neutron and proton radii. 20,22,24,26,28,30,32,34,36,38,40,42,44Mg; calculated two-neutron separation energies, deformation parameters. Transformed harmonic oscillator basis.

doi: 10.1134/1.1383616
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2000PI11      Trans.Bulg.Nucl.Soc. 5, 117 (2000)

S.Pittel

Proton-Neutron Pairing and the Generalized BCS Approximation


2000ST04      Phys.Rev. C61, 034311 (2000)

M.V.Stoitsov, J.Dobaczewski, P.Ring, S.Pittel

Quadrupole Deformations of Neutron-Drip-Line Nuclei Studied within the Skyrme Hartree-Fock-Bogoliubov Approach

NUCLEAR STRUCTURE 20,22,24,26,28,30,32,34,36,38,40,42,44Mg, 8He, 12Be, 22C, 28O, 36Ne, 46Si, 52S, 58Ar; calculated Fermi and pairing energies, deformation, radii. Skyrme HFB approach.

doi: 10.1103/PhysRevC.61.034311
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1999BI17      Phys.Rev. C60, 021302 (1999)

R.Bijker, A.Frank, S.Pittel

Dominance of JP = 0+ Ground States in Even-Even Nuclei from Random Two-Body Interactions

NUCLEAR STRUCTURE 18,20,22O; calculated level distribution features; deduced no time reversal invariance effect in 0+ dominance. Random two-body interactions.

doi: 10.1103/PhysRevC.60.021302
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1999PI03      J.Phys.(London) G25, 661 (1999)

S.Pittel, J.Dobes

Many-Body Approximations in the Presence of Proton-Neutron Pairing

doi: 10.1088/0954-3899/25/4/015
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1998DO03      Phys.Rev. C57, 688 (1998)

J.Dobes, S.Pittel

Boson Mappings and Four-Particle Correlations in Algebraic Neutron-Proton Pairing Models

doi: 10.1103/PhysRevC.57.688
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1998PI07      J.Phys.(London) G24, 1461 (1998)

S.Pittel, M.V.Stoitsov

Use of the Ginocchio Potential in Mean-Field Studies and Beyond

doi: 10.1088/0954-3899/24/8/021
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1998ST19      Phys.Rev. C58, 2092 (1998)

M.V.Stoitsov, W.Nazarewicz, S.Pittel

New Discrete Basis for Nuclear Structure Studies

NUCLEAR STRUCTURE 16O, 40Ca, 208Pb; calculated binding energies, neutron, proton rms radii, local one-body densities. Transformed harmonic oscillator basis.

doi: 10.1103/PhysRevC.58.2092
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1998VA15      J.Phys.(London) G24, 1261 (1998)

P.Van Isacker, J.Dukelsky, S.Pittel, O.Juillet

The Fermion SO(8) Model and Its Connection with an IBM-4 with L = 0 Bosons

doi: 10.1088/0954-3899/24/7/008
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1997BI03      Phys.Rev. C55, R585 (1997)

R.Bijker, A.Frank, S.Pittel

Transition from the Seniority to the Anharmonic Vibrator Regime in Nuclei

doi: 10.1103/PhysRevC.55.R585
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1997EN02      Phys.Rev. C55, 1781 (1997)

J.Engel, S.Pittel, M.Stoitsov, P.Vogel, J.Dukelsky

Neutron-Proton Correlations in an Exactly Solvable Model

doi: 10.1103/PhysRevC.55.1781
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1997ST31      Phys.Lett. 415B, 1 (1997)

M.V.Stoitsov, S.S.Dimitrova, S.Pittel, P.Van Isacker, A.Frank

Analytically Solvable Mean-Field Potential for Stable and Exotic Nuclei

NUCLEAR STRUCTURE 16O, 40Ca, 56,78Ni, 208Pb; calculated ground-state energies, rms radii, density distributions; 56,78Ni; calculated single-particle levels. Ginocchio potential, other potentials compared.

doi: 10.1016/S0370-2693(97)01176-3
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1996BE11      Phys.Lett. 368B, 7 (1996)

J.R.Bennett, J.Engel, S.Pittel

Structure of Pairs in Heavy Weakly-Bound Nuclei

doi: 10.1016/0370-2693(95)01481-0
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1996ST11      Phys.Rev. C53, 3088 (1996)

M.V.Stoitsov, S.Pittel, J.Dukelsky

Brueckner Correlations Following a Boson Mapping of the Two-Color Delta Model

doi: 10.1103/PhysRevC.53.3088
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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
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1994EN03      Phys.Rev. C50, 1702 (1994)

J.Engel, S.Pittel, P.Vogel

Capture of Solar and Higher-Energy Neutrinos by 127I

NUCLEAR STRUCTURE 127I, 127Xe; calculated levels, Gamow-Teller strength distribution for 127I decay. Quasiparticle TDA.

NUCLEAR REACTIONS 127I(ν, X), E=solar; calculated capture σ; deduced calibration related features, present limitations.

doi: 10.1103/PhysRevC.50.1702
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1994PI04      Phys.Rev. C50, 423 (1994)

S.Pittel, J.M.Arias, J.Dukelsky, A.Frank

Consistent Baryon Mapping of Quark Systems

doi: 10.1103/PhysRevC.50.423
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1994VO20      Nucl.Phys. A577, 425c (1994)

P.Vogel, J.Engel, S.Pittel

Neutrino Interaction with Complex Nuclei: The case of 127I

NUCLEAR STRUCTURE 127Xe; calculated levels. 127I; calculated ground state wave function, quenched Gamow-Teller decay to 127Xe strength function. Quasiparticle TDA.

doi: 10.1016/0375-9474(94)90892-3
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1993KI04      Phys.Rev. C47, 567 (1993)

E.Kirchuk, P.Federman, S.Pittel

Nuclear Deformation in the Mass-80 and Mass-100 Regions

NUCLEAR STRUCTURE 72,74,76,78,80,82,84,88,94,96,98,100,102,104,106Sr, 76,78,80,82,84,86,88,90,92,98,100,102,104,106,108,110Mo, 74,76,78,80,82,84,86,88,90,96,98,100,102,104,106,108Zr; calculated nucleon occupation numbers; deduced neutron-proton interaction role in deformation. Hartree-Fock-Bogolyubov calculations.

doi: 10.1103/PhysRevC.47.567
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1993PI08      Phys.Rev. C48, 1050 (1993)

S.Pittel, P.Federman, G.E.Arenas Peris, R.F.Casten, W.-T.Chou

Semiempirical Determination of Effective p-n Monopole Matrix Elements

NUCLEAR STRUCTURE Z=82-126; N=50-82; analyzed data; deduced effective monopole p-n matrix elements.

doi: 10.1103/PhysRevC.48.1050
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1992LA12      Nucl.Phys. A543, 469 (1992)

R.Larsson, S.Pittel, R.Bijker

Mean-Field Approximations for Deformed Odd-Mass Nuclei

NUCLEAR STRUCTURE 166Er, 165Ho; calculated levels. Hartree-Bose-Fermi, Tamm-Dancoff, RPA approximations, neutron-proton interacting boson fermion approximation.

doi: 10.1016/0375-9474(92)90276-P
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1991VO09      J.Phys.(London) G17, S119 (1991)

P.Vogel, J.Engel, S.Pittel

Double Beta Decay and Theory of Nuclear Structure

RADIOACTIVITY 76Ge, 82Se, 128,130Te(2β); compiled 2β-decay; calculated matrix elements. Quasiparticle RPA, other models comparison.

doi: 10.1088/0954-3899/17/S/012
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1990PI03      Nucl.Phys. A507, 239c (1990)

S.Pittel, J.Engel, P.Vogel, X.Ji

Double Beta Decay in the Generalized Seniority Scheme

RADIOACTIVITY 76Ge, 82Se, 128,130Te(2β); calculated 2ν-mode β-decay matrix elements. Generalized seniority truncation scheme.

doi: 10.1016/0375-9474(90)90581-6
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1990PI13      Phys.Lett. 247B, 185 (1990)

S.Pittel, J.Engel, J.Dukelsky, P.Ring

The Nucleus as a Condensate of Collective Quark Triplets

NUCLEAR STRUCTURE 16O; calculated quark occupation numbers.

doi: 10.1016/0370-2693(90)90878-A
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1989EN02      Phys.Lett. 225B, 5 (1989)

J.Engel, P.Vogel, X.Ji, S.Pittel

Double Beta Decay in the Generalized-Seniroity Scheme

RADIOACTIVITY 76Ge, 82Se, 128,130Te(2β); calculated 2β-decay rate, matrix elements. Generalized seniroty based truncation scheme.

doi: 10.1016/0370-2693(89)90999-4
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1987DR10      Ann.Phys.(New York) 176, 114 (1987)

C.H.Druce, S.Pittel, B.R.Barrett, P.D.Duval

The Interacting Boson Model: Microscopic calculations for the Mercury isotopes

NUCLEAR STRUCTURE 194,196,198,200,202Hg; calculated energy levels, B(E2), branching ratios, quadrupole moments. Microscopic interacting boson model.

doi: 10.1016/0003-4916(87)90179-5
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1987EN01      Phys.Rev. C35, 1973 (1987)

J.Engel, A.Frank, S.Pittel

Boson Fermion Dynamical SU(3) Symmetry for Asymmetric Deformation in Odd Mass Nuclei

NUCLEAR STRUCTURE 225Ra; calculated levels. Boson fermion dynamical SU(3) symmetry.

doi: 10.1103/PhysRevC.35.1973
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1986DU09      Phys.Lett. 177B, 125 (1986)

J.Dukelsky, S.Pittel

Boson Mapping of Particle-Particle Operators in Deformed Nuclei

NUCLEAR STRUCTURE 154Sm; calculated s, d, g bosons probabilities. Hartree-Fock-Bogolyubov approximation.

doi: 10.1016/0370-2693(86)91040-3
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1986VA07      Nucl.Phys. A451, 202 (1986)

P.Van Isacker, S.Pittel, A.Frank, P.D.Duval

Microscopic Study of Configuration Mixing in the Interacting Boson Model

NUCLEAR STRUCTURE 102,104,106,108,110,112,114,116,118,120Cd; calculated configuration mixing. Interacting boson model, microscopic study.

doi: 10.1016/0375-9474(86)90411-2
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1985DR05      Phys.Lett. 157B, 115 (1985)

C.H.Druce, S.Pittel, B.R.Barrett, P.D.Duval

Microscopic Calculation of the Majorana Parameters of the Interacting Boson Model for the Hg Isotopes

NUCLEAR STRUCTURE 194,196,198,200,202Hg; calculated levels, Majorana parameters. Neutron-proton interacting boson model.

doi: 10.1016/0370-2693(85)91528-X
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1985PI07      Phys.Rev. C32, 335 (1985)

S.Pittel, J.Dukelsky

Comparison between Semiclassical and Classical Descriptions of the Collective M1 Mode in the Interacting Boson Model

NUCLEAR STRUCTURE 156Gd; calculated collective M1 mode excitation, moment of inertia. Neutron-proton interacting boson model.

doi: 10.1103/PhysRevC.32.335
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1984FE04      Phys.Lett. 140B, 269 (1984)

P.Federman, S.Pittel, A.Etchegoyen

Quenching of the 2p1/2 - 2p3/2 Proton Spin-Orbit Splitting in the Sr-Zr Region

NUCLEAR STRUCTURE 88,90,92,94,96,98Sr; analyzed 2+ level systematics; deduced 2p-proton spin-orbit splitting quenching role. Shell model.

doi: 10.1016/0370-2693(84)90750-0
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1984PI12      Phys.Lett. 144B, 145 (1984)

S.Pittel, J.Dukelsky, R.P.J.Perazzo, H.M.Sofia

s-d-g Boson Model Description of the Collective K = 1+ Mode in Deformed Nuclei

NUCLEAR STRUCTURE A ≈ 160; calculated levels, band head energies, B(M1). Hartree-Bose, TDA, s-d-g boson model.

doi: 10.1016/0370-2693(84)91791-X
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1983DU08      Phys.Lett. 129B, 289 (1983)

P.D.Duval, S.Pittel, B.R.Barrett, C.H.Druce

g-Boson Renormalization Effects in the Interacting Boson Model for Nondegenerate Orbits

NUCLEAR STRUCTURE 204,202,200,198,196,194,192,190,188,186,184Hg; calculated single boson energy splittings, quadrupole boson parameters. Interacting boson model, nondegenerate orbits, g-boson renormalization.

doi: 10.1016/0370-2693(83)90667-6
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1983PI06      Phys.Lett. 128B, 9 (1983)

S.Pittel, J.Dukelsky

The Structure of the S and D Pairs of the Interacting Boson Model from the Hartree-Fock-Bogolyubov Approximation

NUCLEAR STRUCTURE 146,148,150,152,154,156,158,160Sm; calculated spherical, prolate HFB energies, S, D, G nucleon pair probabilities. Microscopic interacting boson model.

doi: 10.1016/0370-2693(83)90063-1
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1982CA07      Nucl.Phys. A379, 61 (1982)

O.Castanos, P.Federman, A.Frank, S.Pittel

Study of the Effective Hamiltonian Interacting Boson Approximation

NUCLEAR STRUCTURE 120,122,124,126,128,130,132Xe, 122,124,126,128,130,132,134Ba, 148,150,152,154,156,158Sm, 230,232,234,236,238U; calculated levels. Interacting boson approximation, effective Hamiltonians.

doi: 10.1016/0375-9474(82)90556-5
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1982PI08      Ann.Phys.(New York) 144, 168 (1982)

S.Pittel, P.D.Duval, B.R.Barrett

The Microscopic Interacting Boson Model for Nondegenerate Orbits

NUCLEAR STRUCTURE Z=50-82; N=82-126; calculated boson-boson, quadrupole-quadrupole interaction. Microscopic interacting boson model.

doi: 10.1016/0003-4916(82)90107-5
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1981PI13      Phys.Rev. C24, 2343 (1981)

S.Pittel, J.D.Vergados

Lepton Nonconserving (μ-, e+) Raction to Individual Nuclear States

NUCLEAR REACTIONS 40Ca(μ-, e+), E at rest; calculated branching ratio. Gauge model.

doi: 10.1103/PhysRevC.24.2343
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1979FE04      Phys.Lett. 82B, 9 (1979)

P.Federman, S.Pittel, R.Campos

Microscopic Study of the Shape Transition in the Zirconium Isotopes

NUCLEAR STRUCTURE 96,98Zr; calculated spectra. Shell model, weak coupling model. 102Zr deduced neutron-proton interaction between selected orbitals leads to deformation.

doi: 10.1016/0370-2693(79)90412-X
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1979FE07      Phys.Rev. C20, 820 (1979)

P.Federman, S.Pittel

Unified Shell-Model Description of Nuclear Deformation

NUCLEAR STRUCTURE 96,98,100Zr, 98,100,102,104,106,108,110Mo; calculated energy levels; deduced phase transition. Hartree-Fock-Bogoliubov method, surface delta interaction. Shell model, 84Sr core, Yukawa force, Rosenfeld mixture.

doi: 10.1103/PhysRevC.20.820
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1978FE05      Phys.Lett. 77B, 29 (1978)

P.Federman, S.Pittel

Hartree-Fock-Bogolyubov Study of Deformation in the Zr-Mo Region

NUCLEAR STRUCTURE 98,100,102,104,106,108,110Mo; calculated deformation energies.

doi: 10.1016/0370-2693(78)90192-2
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1976LE02      Nucl.Phys. A256, 509 (1976)

T.-S.H.Lee, S.Pittel

The Influence of Ambiguities in the Pion Production Operator on (p, P+) Cross Sections

NUCLEAR REACTIONS 12C(p, π+), E=185 MeV; calculated σ. DWBA calculations.

doi: 10.1016/0375-9474(76)90387-0
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1976PI01      Phys.Rev. C13, 412 (1976)

S.Pittel, C.M.Vincent, J.D.Vergados

Perturbative Approximations to the Effective Interaction: Comparisons with Exact Results for Large Matrices

NUCLEAR STRUCTURE 18O; calculated perturbative approximations to the effective interaction. Pade approximants.

doi: 10.1103/PhysRevC.13.412
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1976PI02      Phys.Lett. 61B, 324 (1976)

S.Pittel

On the Energy-Dependence of Background-Resonance Interference Effects in Knockout Reactions

NUCLEAR REACTIONS 12C(p, 2p), E=0.2-1.0 GeV; calculated missing-energy spectra.

doi: 10.1016/0370-2693(76)90578-5
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1976PI14      Nucl.Phys. A271, 62 (1976)

S.Pittel

A Method for Estimating the Singular Part of the Effective Shell-Model Interaction and its Influence on Perturbation Theory

NUCLEAR STRUCTURE 18O; calculated intruder state singularities.

doi: 10.1016/0375-9474(76)90268-2
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1975LE04      Phys.Rev. C11, 607 (1975)

T.-S.H.Lee, S.Pittel

Fragmentation of Magnetic Dipole Strength in 208Pb

NUCLEAR STRUCTURE 208Pb; calculated levels.

doi: 10.1103/PhysRevC.11.607
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1974PI01      Nucl.Phys. A218, 221 (1974)

S.Pittel, N.Austern

Background-Resonance Interference Effects in Knockout Reactions

NUCLEAR REACTIONS 12C(p, 2p); measured nothing, calculated σ.

doi: 10.1016/0375-9474(74)90001-3
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1973VI11      Phys.Lett. 47B, 327 (1973)

C.M.Vincent, S.Pittel

Perturbative Approximations to the Effective Hamiltonian in the Presence of an Intruder State

NUCLEAR STRUCTURE 18O; calculated matrix elements.

doi: 10.1016/0370-2693(73)90614-X
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1972PI11      Phys.Rev.Lett. 29, 1403 (1972)

S.Pittel, N.Austern

Lifetime Effects in (p, 2p) Reactions

NUCLEAR REACTIONS 12C(p, 2p), E=460 MeV; calculated σ, missing mass spectrum; analyzed T1/2 effects.

doi: 10.1103/PhysRevLett.29.1403
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1971PE15      Phys.Lett. 37B, 278 (1971)

R.J.Peterson, S.Pittel, H.Rudolph

An Unexpected 1/2- State in 55Mn

NUCLEAR REACTIONS 57Fe(p, 3He), E=27 MeV; measured σ(θ). 55Mn deduced level, J, π, L, S.

doi: 10.1016/0370-2693(71)90018-9
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1971PI02      Phys.Lett. 34B, 555 (1971)

S.Pittel

Mechanism for Extending the 20Ne Rotational Band

NUCLEAR STRUCTURE 20Ne; calculated levels. Rotational band extension by shell-model space expansion.

doi: 10.1016/0370-2693(71)90133-X
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1970FE06      Nucl.Phys. A155, 161 (1970)

P.Federman, S.Pittel

Structure of the Calcium Isotopes

NUCLEAR STRUCTURE 41,42,43,44,45,46,47,48,49,50Ca; calculated levels, binding energy, S. Shell model, effective interactions.

doi: 10.1016/0375-9474(70)90084-9
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1970HA38      Phys.Lett. 32B, 542 (1970)

K.Harada, S.Pittel

M1 Decay of the 1.7 MeV 1+ State in 206Pb

NUCLEAR STRUCTURE 206Pb; calculated B(M1) for 1.7-MeV 1+ state.

doi: 10.1016/0370-2693(70)90538-1
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1970HA57      Nucl.Phys. A159, 209 (1970)

K.Harada, S.Pittel

The Effects of Magnetic Dipole Core Polarization in 206Pb and 207Pb

NUCLEAR STRUCTURE 206,207Pb; calculated levels, B(M1), μ. Weak-coupling model, magnetic dipole core polarization.

doi: 10.1016/0375-9474(70)90037-0
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1970PI05      Phys.Lett. 33B, 158 (1970)

S.Pittel

Core-Excited States in 54Fe

NUCLEAR STRUCTURE 54Fe; calculated core-excited states.

doi: 10.1016/0370-2693(70)90289-3
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1969FE07      Nucl.Phys. A139, 108 (1969)

P.Federman, S.Pittel

Jπ = 2+ States and E2 Transition Rates in 40Ca

NUCLEAR STRUCTURE 40Ca; calculated levels, B(E2).

doi: 10.1016/0375-9474(69)90263-2
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1969FE09      Phys.Rev. 186, 1106 (1969)

P.Federman, S.Pittel

J = 0+ States in Ca40 and Ca42

NUCLEAR STRUCTURE 40,42Ca; calculated levels. Particle-hole model.

doi: 10.1103/PhysRev.186.1106
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1969PI13      Phys.Rev. 187, 1398 (1969)

S.Pittel, B.F.Bayman

Shell-Model Calculation of the Even-Parity States of Ca43

NUCLEAR STRUCTURE 43K; calculated log ft. 43Ca; calculated levels; S for 44Ca(p, d), 42Ca(d, p); M2 hindrance factors. Shell model.

doi: 10.1103/PhysRev.187.1398
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