NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = Y.Alhassid Found 80 matches. 2024FA05 Phys.Rev. C 109, L031302 (2024) Low-energy enhancement in the magnetic dipole γ-ray strength functions of heavy nuclei
doi: 10.1103/PhysRevC.109.L031302
2021FA08 Phys.Rev. C 103, 064310 (2021) State densities of heavy nuclei in the static-path plus random-phase approximation NUCLEAR STRUCTURE 148,149,150,151,152,153,154,155Sm; calculated ground-state energies, canonical entropies as function of inverse temperature, state densities as function of excitation energy using the static-path plus random-phase approximation (SPA+RPA) in the configuration-interaction (CI) shell-model framework against exact shell-model Monte Carlo (SMMC) state densities. Comparison with mean-field state densities calculated with the finite-temperature Hartree-Fock-Bogoliubov (HFB) approximation. Comparison with experimental data.
doi: 10.1103/PhysRevC.103.064310
2021GU12 Phys.Lett. B 816, 136206 (2021) M.Guttormsen, Y.Alhassid, W.Ryssens, K.O.Ay, M.Ozgur, E.Algin, A.C.Larsen, F.L.Bello Garrote, L.Crespo Campo, T.Dahl-Jacobsen, A.Gorgen, T.W.Hagen, V.W.Ingeberg, B.V.Kheswa, M.Klintefjord, J.E.Midtbo, V.Modamio, T.Renstrom, E.Sahin, S.Siem, G.M.Tveten, F.Zeiser Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes NUCLEAR REACTIONS 142,144,146,148,150Nd(p, X), E=16 MeV; 142,144,146,148,150Nd(α, X), E=13.5 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, nuclear level densities, quadrupole deformation parameters. Comparison with the shell model Monte Carlo (SMMC) calculations.
doi: 10.1016/j.physletb.2021.136206
2021RY03 Eur.Phys.J. A 57, 76 (2021) Finite-temperature mean-field approximations for shell model Hamiltonians: the code HF-SHELL NUCLEAR STRUCTURE 24Mg, 144Nd, 162Dy; calculated energy surfaces, nuclear state densities, quadrupole moments. Comparison with available data.
doi: 10.1140/epja/s10050-021-00365-3
2020FA02 Phys.Rev. C 101, 014607 (2020) P.Fanto, Y.Alhassid, H.A.Weidenmuller Statistical-model description of γ decay from compound-nucleus resonances NUCLEAR REACTIONS 95Mo(n, γ)96Mo*, E(γ)<10 MeV; calculated partial widths of the neutron and the γ-decay channels, and total γ-decay width distribution for all the spin-parity values of the resonances of the compound nucleus using random-matrix model with coupling to the entrance neutron channel and to a large number of nonequivalent γ channels, employing empirical parametrizations for nuclear level density (NLD) and γ strength function (γSF); deduced that Porter-Thomas distribution (PTD) described the distribution of partial widths for all the decay channels, in agreement with the statistical-model expectation, and that large fluctuations of the total γ-decay widths in experiments by 2013Ko13 could not be explained within a statistical-model description of the compound nucleus.
doi: 10.1103/PhysRevC.101.014607
2020PO05 Phys.Rev. C 101, 054307 (2020) A.Poves, F.Nowacki, Y.Alhassid Limits on assigning a shape to a nucleus NUCLEAR STRUCTURE 20,22Ne, 24Mg, 28,34Si, 48,64Cr, 44S, 68Ni, 70Zn, 76Ge; calculated β and γ deformation parameters, fluctuations in β and γ deformation parameters using the quadrupole invariants, within the framework of the configuration-interaction shell model framework. Discussion of shape coexistence in 68Ni, and rigid triaxiality in 76Ge, 76Se, and notion of spherical doubly magic nuclei.
doi: 10.1103/PhysRevC.101.054307
2019AL09 Phys.Rev. C 99, 024621 (2019) Y.Alhassid, G.F.Bertsch, P.Fanto, T.Kawano Transmission coefficients in compound-nucleus reaction theory
doi: 10.1103/PhysRevC.99.024621
2018FA06 Phys.Rev. C 98, 014604 (2018) P.Fanto, G.F.Bertsch, Y.Alhassid Neutron width statistics in a realistic resonance-reaction model NUCLEAR REACTIONS 194Pt(n, n), (n, γ), E=1-14 keV; calculated neutron strength function parameter, σ(E), and reduced neutron width distributions; deduced that Porter-Thomas distribution (PTD) describes well the distribution of reduced neutron widths, and that nonstatistical interactions do not explain the experimentally observed PTD violation. Statistical model calculations combined with a realistic treatment of the neutron channel described by Gaussian orthogonal ensemble (GOE) of random-matrix theory. Comparison with experimental data.
doi: 10.1103/PhysRevC.98.014604
2018GI02 Phys.Rev. C 97, 014315 (2018) C.N.Gilbreth, Y.Alhassid, G.F.Bertsch Nuclear deformation in the laboratory frame NUCLEAR STRUCTURE 162Dy, 144,146,148,150,152Nd, 148,150,152,154Sm; calculated probability distribution of the axial quadrupole operator P(q) as function of temperature, quadrupole invariants <Q.Q>, quadrupole moments, effective deformation parameters β and γ within the rotationally invariant framework of the configuration-interaction shell model, and using finite-temperature auxiliary-field quantum Monte Carlo (AFMC) method.
doi: 10.1103/PhysRevC.97.014315
2018MU14 Phys.Rev. C 98, 034317 (2018) M.T.Mustonen, C.N.Gilbreth, Y.Alhassid, G.F.Bertsch Statistical theory of deformation distributions in nuclear spectra NUCLEAR STRUCTURE 148,150,152,154Sm; calculated second, third, and fourth moments of Q20 moment as a function of temperature, intrinsic quadrupole shape contours in the (β, γ) plane, probabilities of spherical, prolate, and oblate shapes as a function of temperature, first derivatives of Landau-like expansion parameters, nuclear state densities, and shape probabilities as a function of excitation energy using auxiliary-field Monte Carlo (AFMC) approach with configuration-interaction (CI) shell model.
doi: 10.1103/PhysRevC.98.034317
2017FA07 Phys.Rev. C 96, 014305 (2017) P.Fanto, Y.Alhassid, G.F.Bertsch Particle-number projection in the finite-temperature mean-field approximation NUCLEAR STRUCTURE 162Dy, 148,150Sm; calculated canonical entropies in the HF approximation for 162Dy, in the BCS limit of the HFB approximation for 148Sm, and in the HFB approximation for 150Sm, excitation energies and state density for 150Sm in the HFB approximation, using a general formula for exact particle number projection (PNP) after variation in the finite-temperature HFB approximation, and assessing the accuracy of the PNP through the shell-model Monte Carlo (SMMC) as a benchmark.
doi: 10.1103/PhysRevC.96.014305
2016AL09 Phys.Rev. C 93, 044320 (2016) Y.Alhassid, G.F.Bertsch, C.N.Gilbreth, H.Nakada Benchmarking mean-field approximations to level densities NUCLEAR STRUCTURE 148Sm, 162Dy; calculated canonical excitation energies, mean square angular momentum and second moments of angular momentum, entropies, as function of inverse temperature, s-wave resonance spacings, state densities, particle-projected frozen-potential (FP) density versus excitation energy. Shell model Monte Carlo (SMMC) and Hartree-Fock (HF) calculations. Assessment of accuracy of finite-temperature mean-field theory. Data files presented in supplemental material depository. Benchmarking of level densities in mean-field approximations for heavy spherical (e.g. 148Sm) and heavy deformed (e.g. 162Dy) nuclei. Comparison with available experimental data.
doi: 10.1103/PhysRevC.93.044320
2015AL18 Phys.Rev. C 92, 024307 (2015) Y.Alhassid, M.Bonett-Matiz, S.Liu, H.Nakada Direct microscopic calculation of nuclear level densities in the shell model Monte Carlo approach NUCLEAR STRUCTURE 56Fe, 60,62Ni, 60Co, 162Dy; calculated microscopic nuclear level densities, and moment of inertia at finite excitation energy in the shell model Monte Carlo (SMMC) approach. Comparison with experimental data.
doi: 10.1103/PhysRevC.92.024307
2015AL33 Eur.Phys.J. A 51, 171 (2015) The shell model Monte Carlo approach to level densities: Recent developments and perspectives
doi: 10.1140/epja/i2015-15171-3
2015OZ01 Phys.Rev. C 91, 034329 (2015) Nuclear state densities of odd-mass heavy nuclei in the shell model Monte Carlo approach NUCLEAR STRUCTURE 143,145,147,149Nd, 149,150,151,153,155Sm; calculated thermal excitation energy and partition function as function of temperature, level densities versus excitation energy. Shell model Monte Carlo (SMMC) calculations. Comparison with experimental data.
doi: 10.1103/PhysRevC.91.034329
2014AL12 Nucl.Data Sheets 118, 233 (2014) Calculating Level Densities of Heavy Nuclei by the Shell Model Monte Carlo Method NUCLEAR STRUCTURE 148,150,152,154Sm; calculated average total nuclear spin. 143,144,145,146,147,148,149,150,152Nd, 148,149,150,151,152,153,154,155Sm; calculated state density vs excitation energy, even-mass nuclei collective enhancement factor using Monte Carlo microscopic approach. Compared with available data.
doi: 10.1016/j.nds.2014.04.045
2014AL34 Phys.Rev.Lett. 113, 262503 (2014) Y.Alhassid, C.N.Gilbreth, G.F.Bertsch Nuclear Deformation at Finite Temperature NUCLEAR STRUCTURE 20Ne, 148,154Sm; calculated the axial quadrupole operator using the AFMC method, deformation parameters.
doi: 10.1103/PhysRevLett.113.262503
2013BO16 Phys.Rev. C 88, 011302 (2013) M.Bonett-Matiz, A.Mukherjee, Y.Alhassid Level densities of nickel isotopes: Microscopic theory versus experiment NUCLEAR STRUCTURE 59,60,61,62,63,64Ni; calculated level densities, ground-state energies using the spin projection method, and shell model Monte Carlo (SMMC) approach in complete pfg9/2 shell. Comparison with experimental data for proton evaporation spectra and neutron resonances.
doi: 10.1103/PhysRevC.88.011302
2013OZ01 Phys.Rev.Lett. 110, 042502 (2013) Crossover from Vibrational to Rotational Collectivity in Heavy Nuclei in the Shell-Model Monte Carlo Approach NUCLEAR STRUCTURE 148,150,152,154Sm, 144,146,148,150,152Nd; calculated the crossover from vibrational to rotational collectivity in the low-temperature behavior. HFB approximation.
doi: 10.1103/PhysRevLett.110.042502
2012MU09 Phys.Rev.Lett. 109, 032503 (2012) Odd-Particle Systems in the Shell Model Monte Carlo Method: Circumventing a Sign Problem NUCLEAR STRUCTURE 47,48,49Ti, 51,52,53,54,55Cr, 53,54,55,56,57,58,59,60,61Fe, 59,60,61,62,63,64,65Ni, 63,64,65,66,67Zn, 69,70,71Ge; calculated neutron pairing gaps, ground state energy. Shell model Monte Carlo method, comparison with available data.
doi: 10.1103/PhysRevLett.109.032503
2011MU01 Phys.Rev. C 83, 014319 (2011) A.Mukherjee, Y.Alhassid, G.F.Bertsch Number-conserving theory of nuclear pairing gaps: A global assessment NUCLEAR STRUCTURE A=50-250, N=10-150, Z=10-102; Z=50, N=55-83; calculated odd-even staggering or pairing gaps using pairing Hamiltonian from the self-consistent mean field (SCMF) output and configuration space Monte Carlo (CSMC) method. Global survey (of 443 neutron pairing gaps) using a numerically exact technique to calculate pairing correlation energies at fixed particle number.
doi: 10.1103/PhysRevC.83.014319
2009VA03 Phys.Rev. C 79, 024302 (2009) K.Van Houcke, S.M.A.Rombouts, K.Heyde, Y.Alhassid Microscopic calculation of symmetry projected nuclear level densities NUCLEAR STRUCTURE 55,56,57Fe; calculated level densities as a function of angular momentum, moments of inertia and pair correlation energies as a function of excitation energy. 56Fe; calculated parity-projected level densities and total quantum Monte Carlo densities as a function of excitation energy. Quantum Monte Carlo microscopic calculation of symmetry projected level densities.
doi: 10.1103/PhysRevC.79.024302
2008AL25 Phys.Rev.Lett. 101, 082501 (2008) Heavy Deformed Nuclei in the Shell Model Monte Carlo Method NUCLEAR STRUCTURE 162Dy; calculated ground state energy, moment of inertia, level density; comparison with experimental results; shell model Monte Carlo approach;
doi: 10.1103/PhysRevLett.101.082501
2008NA24 Phys.Rev. C 78, 051304 (2008); Publishers Note Phys.Rev. C 78, 069907 (2008) Isospin-projected nuclear level densities by the shell model Monte Carlo method NUCLEAR STRUCTURE 58Cu, 70Zn; calculated level densities. Shell Model Monte Carlo approach.
doi: 10.1103/PhysRevC.78.051304
2008RO15 Phys.Rev. C 77, 064308 (2008) R.Rodriguez-Guzman, Y.Alhassid, G.F.Bertsch Effective shell model Hamiltonians from density functional theory: Quadrupolar and pairing correlations NUCLEAR STRUCTURE 20Ne, 24Mg, 36Ar; calculated correlation energy, occupation probabilities of valence orbitals, deformation energies, pairing energies, energy curves, coupling constants. Hartree-Fock plus Bardeen-Cooper-Schrieffer approximation with Skyrme energy density functional.
doi: 10.1103/PhysRevC.77.064308
2007AL45 Nucl.Phys. A788, 357c (2007) Thermal Signatures of Pairing Correlations in Nuclei and Nanoparticles NUCLEAR STRUCTURE 55,56,57,58,59,60Fe; calculated moments of inertia vs temperature.
doi: 10.1016/j.nuclphysa.2007.01.065
2007AL51 Phys.Rev.Lett. 99, 162504 (2007) Spin Projection in the Shell Model Monte Carlo Method and the Spin Distribution of Nuclear Level Densities NUCLEAR STRUCTURE 55,56Fe, 60Co; calculated spin distributions of level densities using the shell model monte carlo approach.
doi: 10.1103/PhysRevLett.99.162504
2007MO15 Phys.Rev. C 75, 045805 (2007) D.Mocelj, T.Rauscher, G.Martinez-Pinedo, K.Langanke, L.Pacearescu, A.Faessler, F.-K.Thielemann, Y.Alhassid Large-scale prediction of the parity distribution in the nuclear level density and application to astrophysical reaction rates NUCLEAR STRUCTURE 56,58,60,62,64,66Fe, 47,48,49,50,66,68,70,72Ni, 66,70Zn, 76,78,80,82Sr, 89Y, 90Zr, 91Nb, 92Mo, 118,120,122,124Sn; calculated parity-projected level density ratios. NUCLEAR REACTIONS 67,69Se(n, γ), (p, γ), E=low; 94Nb, 95Zr(p, γ), E=low; calculated astrophysical reaction rates.
doi: 10.1103/PhysRevC.75.045805
2006AL23 Phys.Rev. C 74, 034301 (2006) Y.Alhassid, G.F.Bertsch, L.Fang, B.Sabbey Effective quadrupole-quadrupole interaction from density functional theory NUCLEAR STRUCTURE 20Ne, 24Mg, 28Si, 36Ar; calculated wave functions, quadrupole-quadrupole interaction, correlation energies. Density functional theory.
doi: 10.1103/PhysRevC.74.034301
2005AL47 Phys.Rev. C 72, 064326 (2005) Y.Alhassid, G.F.Bertsch, L.Fang, S.Liu Nuclear moment of inertia and spin distribution of nuclear levels NUCLEAR STRUCTURE 55,56,57,58,59,60Fe, 55,56Mn; calculated moments of inertia vs temperature.
doi: 10.1103/PhysRevC.72.064326
2004NA03 Nucl.Phys. A731, 153 (2004) V.Nanal, T.L.Khoo, D.J.Hofman, B.B.Back, M.P.Carpenter, I.Dioszegi, K.Eisenman, M.L.Halbert, P.Heckman, A.M.Heinz, D.Henderson, D.Jenkins, M.P.Kelly, F.G.Kondev, T.Lauritsen, C.J.Lister, B.McClintock, S.Mitsuoka, T.Pennington, J.Seitz, R.H.Siemssen, M.Thoennessen, R.J.van Swol, R.L.Varner, P.Wilt, Y.Alhassid Highly Selective Studies of GDR in 164Er NUCLEAR REACTIONS 124Sn(40Ar, xn), E=163, 187 MeV; measured Eγ, Iγ, (recoil)γ-coin. 164Er deduced GDR parameters, angular momentum dependence of strength function.
doi: 10.1016/j.nuclphysa.2003.11.028
2003AL30 Phys.Rev. C 68, 044322 (2003) Y.Alhassid, G.F.Bertsch, L.Fang Nuclear level statistics: Extending shell model theory to higher temperatures NUCLEAR STRUCTURE 56Fe; calculated level density, partition functions vs temperature. Shell model Monte Carlo approach.
doi: 10.1103/PhysRevC.68.044322
2003MO25 Nucl.Phys. A718, 650c (2003) D.Mocelj, T.Rauscher, G.Martinez-Pinedo, Y.Alhassid Influence of Parity-Dependence in the nuclear Level Density on the Prediction of Astrophysical Reaction Rates NUCLEAR REACTIONS 64Co, 66Cu, 66Ga(n, p), 63Fe, 65Ni, 65Zn(n, γ), 67Ni, 69Zn, 69Ge(n, α), E=low; calculated astrophysical reaction rates, effects of parity dependence in level density.
doi: 10.1016/S0375-9474(03)00876-5
2003NA24 Nucl.Phys. A718, 691c (2003) Microscopic Nuclear Level Densities by the Shell Model Monte Carlo Method NUCLEAR STRUCTURE 56Fe, 58Cu, 60Ni, 68Zn; calculated level densities. Shell Model Monte Carlo approach.
doi: 10.1016/S0375-9474(03)00890-X
2002HA29 Phys.Rev. C65, 064311 (2002) A.Hamoudi, R.G.Nazmitdinov, E.Shahaliev, Y.Alhassid Statistical Fluctuations of Electromagnetic Transition Intensities and Electromagnetic Moments in pf-Shell Nuclei NUCLEAR STRUCTURE A=60; analyzed level spacing, B(E2) and B(M1) strength distributions, magnetic dipole moments, fluctuation properties. Porter-Thomas distribution.
doi: 10.1103/PhysRevC.65.064311
2001AL29 Nucl.Phys. A690, 163c (2001) Quantum Monte Carlo Methods for the Nuclear Shell Model at Finite Temperature NUCLEAR STRUCTURE 55Mn, 55,56Fe, 55Co, 60Ni, 68Zn; calculated level density vs excitation energy, related features. Shell model, quantum Monte Carlo approach. Comparisons with data.
doi: 10.1016/S0375-9474(01)00940-X
2001KU10 Nucl.Phys. A687, 212c (2001) D.Kusnezov, Y.Alhassid, K.A.Snover, W.E.Ormand Giant Dipole Resonances in Hot, Rotating Nuclei: Nuclear shapes and shell corrections NUCLEAR STRUCTURE Sc, Cu, Zr, Mo, Sn, Dy, Pb; calculated GDR width vs temperature and angular momentum. 92,96,100Mo; calculated GDR width as a function of temperature and angular momentum. 44Ti, 90Zr, 120Sn, 168Er, 208Pb; calculated deformation parameters vs temperature and spin for hot rotating nuclei. Shell effects discussed, comparison with data.
doi: 10.1016/S0375-9474(01)00623-6
2001LI38 Phys.Rev.Lett. 87, 022501 (2001) Signature of a Pairing Transition in the Heat Capacity of Finite Nuclei NUCLEAR STRUCTURE 52,53,54,55,56,57,58,59,60,61,62Fe; calculated heat capacity vs temperature; deduced pairing transition features. Shell model Monte Carlo approach.
doi: 10.1103/PhysRevLett.87.022501
2000AL13 Phys.Rev.Lett. 84, 4313 (2000) Y.Alhassid, G.F.Bertsch, S.Liu, H.Nakada Parity Dependence of Nuclear Level Densities NUCLEAR STRUCTURE 56Fe, 60Ni, 68Zn; calculated level densities, occupation numbers, parity dependences. Simple formula, comparison with Monte Carlo shell model results.
doi: 10.1103/PhysRevLett.84.4313
1999AL19 Nucl.Phys. A649, 107c (1999) Giant Dipole Resonances in Hot Rotating Nuclei: Overview and recent advances
doi: 10.1016/S0375-9474(99)00047-0
1999AL34 Phys.Rev.Lett. 83, 4265 (1999) Particle-Number Reprojection in the Shell Model Monte Carlo Method: Application to nuclear level densities NUCLEAR STRUCTURE 50,51,52,53,54,55,56Mn, 52,53,54,55,56,57,58Fe, 54,55,56,57,58,59,60Co; calculated level density vs excitation energy, related parameters. Shell model Monte Carlo approach, particle number reprojection method. Comparisons with data.
doi: 10.1103/PhysRevLett.83.4265
1999KU14 Nucl.Phys. A649, 193c (1999) D.Kusnezov, Y.Alhassid, K.A.Snover Systematics of the Nuclear Giant Dipole Resonance NUCLEAR STRUCTURE A=45-208; analyzed GDR widths vs temperature, spin, mass; deduced phenomenological function. Liquid drop, Nilsson-Strutinsky approaches.
doi: 10.1016/S0375-9474(99)00059-7
1999NA20 Nucl.Phys. A649, 153c (1999) V.Nanal, B.B.Back, D.J.Hofman, G.Hackman, D.Ackermann, S.Fischer, D.Henderson, R.V.F.Janssens, T.L.Khoo, A.A.Sonzogni, Y.Alhassid Exclusive Studies of the GDR in Excited Nuclei NUCLEAR REACTIONS 124Sn(40Ar, 4n), E=160 MeV; measured Eγ, Iγ, (recoil)γ-coin. 164Er deduced GDR parameters. Fragment mass analyzer.
doi: 10.1016/S0375-9474(99)00053-6
1998KU16 Phys.Rev.Lett. 81, 542 (1998) D.Kusnezov, Y.Alhassid, K.A.Snover Scaling Properties of the Giant Dipole Resonance Width in Hot Rotating Nuclei NUCLEAR STRUCTURE A=45-208; compiled, analyzed GDR widths vs temperature, spin, mass; deduced phenomenological formula.
doi: 10.1103/PhysRevLett.81.542
1998NA33 Phys.Lett. 436B, 231 (1998) Microscopic Nuclear Level Densities from Fe to Ge by the Shell Model Monte Carlo Method NUCLEAR STRUCTURE 54,56,58Fe, 58,60,62,64Ni, 64,66,68,70Zn, 70,72Ge; calculated total, parity-projected level densities, first 2+ state excitation energies, related features. Shell model Monte Carlo method.
doi: 10.1016/S0370-2693(98)00911-3
1997AT04 Nucl.Phys. A625, 565 (1997) The Perturbed Static Path Approximation at Finite Temperature: Observables and strength functions
doi: 10.1016/S0375-9474(97)00486-7
1997NA16 Phys.Rev.Lett. 79, 2939 (1997) Total and Parity-Projected Level Densities of Iron-Region Nuclei in the Auxiliary Fields Monte Carlo Shell Model NUCLEAR STRUCTURE 56Fe; calculated level density, total energy, related features; deduced model parameter dependence. Shell model Monte Carlo method. Comparison to data, Hartree-Fock approximation.
doi: 10.1103/PhysRevLett.79.2939
1996AL26 Phys.Rev.Lett. 77, 1444 (1996) Y.Alhassid, G.F.Bertsch, D.J.Dean, S.E.Koonin Shell Model Monte Carlo Studies of γ-Soft Nuclei NUCLEAR STRUCTURE 128Te, 124Xe, 124Sn; calculated shape distributions, moments of inertia, pairing correlations vs temperature, angular velocity. Shell model Monte Carlo calculations.
doi: 10.1103/PhysRevLett.77.1444
1995DE15 Phys.Rev.Lett. 74, 2909 (1995) D.J.Dean, S.E.Koonin, K.Langanke, P.B.Radha, Y.Alhassid Thermal Properties of 54Fe NUCLEAR STRUCTURE 54Fe; calculated B(λ), isoscalar, isovector quadrupole strengths, other observables vs temperature.
doi: 10.1103/PhysRevLett.74.2909
1995DR05 Phys.Rev. C52, 578 (1995) Z.M.Drebi, K.A.Snover, A.W.Charlop, M.S.Kaplan, D.P.Wells, D.Ye, Y.Alhassid Spin-Induced Shape Changes in Light-Medium Mass Compound Nuclei NUCLEAR REACTIONS 27Al(32S, X), E=90-215 MeV; 45Sc(18O, X), E=54-149 MeV; measured γ(θ), production σ. 59,63Cu deduced GDR characteristics.
doi: 10.1103/PhysRevC.52.578
1995LA13 Phys.Rev. C52, 718 (1995) K.Langanke, D.J.Dean, P.B.Radha, Y.Alhassid, S.E.Koonin Shell-Model Monte Carlo Studies of fp-Shell Nuclei NUCLEAR STRUCTURE 48,50,52,54Ti, 48,50,52,54,56Cr, 52,54,56,58,60Fe, 56,58,60,62,64Ni, 60,62,64Zn; calculated mass excesses, Coulomb, binding energies, B(λ), Gamow-Teller transition strengths, proton, neutron pairing fields expectation values. Shell model, Monte Carlo techniques.
doi: 10.1103/PhysRevC.52.718
1995VA07 Phys.Lett. 343B, 64 (1995) J.P.S.van Schagen, Y.Alhassid, J.C.S.Bacelar, B.Bush, M.N.Harakeh, W.H.A.Hesselink, H.J.Hofmann, N.Kalantar-Nayestanaki, R.F.Noorman, A.J.M.Plompen, A.Stolk, Z.Sujkowski, A.van der Woude GDR γ-Ray Decay in 156Dy(*) from Regions Selected on Temperature and Angular Momentum NUCLEAR REACTIONS 116Cd(40Ar, X), E=200 MeV; 114Cd(40Ar, X), E=173 MeV; measured γ difference spectra. 156,154Dy GDR γ-decay features from restricted temperature, angular momentum regions.
doi: 10.1016/0370-2693(94)01467-Q
1994AL06 Phys.Rev.Lett. 72, 613 (1994) Y.Alhassid, D.J.Dean, S.E.Koonin, G.Lang, W.E.Ormand Practical Solution to the Monte Carlo Sign Problem: Realistic calculations of 54Fe NUCLEAR STRUCTURE 54Fe; calculated isoscalar, isovector quadrupole, Gamow-Teller transition strengths; deduced Gamow-Teller β+ strength quenching, solution to Monte Carlo sign problem.
doi: 10.1103/PhysRevLett.72.613
1994AL13 Nucl.Phys. A569, 37c (1994) The Giant Dipole Resonance in Hot Rotating Nuclei NUCLEAR STRUCTURE 90Zr, 92Mo, 156Dy, 45Sc, 59Cu; analyzed GDR associated absorption σ vs E. Macroscopic approach, large amplitude shape fluctuations.
doi: 10.1016/0375-9474(94)90094-9
1994AL26 Nucl.Phys. A577, 709 (1994) Algebraic Rotating-Frame Approach to Nuclear Reactions NUCLEAR REACTIONS 154Sm(α, α'), (α, α), E=50 MeV; calculated σ(θ); deduced Coulomb excitation inclusion features. Algebraic rotating frame approach.
doi: 10.1016/0375-9474(94)90941-5
1994DE31 Phys.Rev.Lett. 72, 4066 (1994) D.J.Dean, P.B.Radha, K.Langanke, Y.Alhassid, S.E.Koonin, W.E.Ormand Complete 0(h-bar x Omega) Calculations of Gamow-Teller Strengths for Nuclei in the Iron Region NUCLEAR STRUCTURE 56,54Fe, 56,58Ni, 54Cr, 55Mn; calculated B(λ), quadrupole moments, Gamow-Teller transition strength. Shell model, Monte Carlo techniques, different interactions.
doi: 10.1103/PhysRevLett.72.4066
1994LA13 Phys.Rev.Lett. 72, 2809 (1994) B.Lauritzen, Y.Alhassid, N.Whelan Nongeneric Nuclear Spectral Fluctuations
doi: 10.1103/PhysRevLett.72.2809
1994PA10 Phys.Rev. C49, 2919 (1994) M.P.Pato, C.A.Nunes, C.L.Lima, M.S.Hussein, Y.Alhassid Deformed Gaussian Orthogonal Ensemble Analysis of the Interacting Boson Model
doi: 10.1103/PhysRevC.49.2919
1993AL08 Nucl.Phys. A553, 137c (1993) Hot Rotating Nuclei NUCLEAR REACTIONS 92Mo, 90Zr(γ, X), E ≤ 25 MeV; 45Sc(γ, X), E ≤ 30 MeV; compiled, reviewed photoabsorption σ(E) data, calculations. Hot rotating nuclei. NUCLEAR STRUCTURE 166Er, 112Sn; compiled, reviewed dipole correlation, GDR excitation σ data, calculations. Hot rotating nuclei.
doi: 10.1016/0375-9474(93)90620-D
1993AL24 Nucl.Phys. A565, 427 (1993) The Jacobi Transition and the Giant-Dipole Resonance in Rapidly Rotating Hot Nuclei NUCLEAR STRUCTURE 45Sc; calculated free energy surface, GDR σ(Eγ); deduced Jacobi phase transition with shape change. Hot rotating nuclei.
doi: 10.1016/0375-9474(93)90219-N
1993KI12 Phys.Lett. 308B, 225 (1993) M.Kicinska-Habior, K.A.Snover, J.A.Behr, C.A.Gossett, Y.Alhassid, N.Whelan Search for a Phase Transition in the Nuclear Shape at Finite Temperature and Rapid Rotation NUCLEAR REACTIONS 27Al(18O, X), E=44.9-109.6 MeV; measured Eγ, Iγ; deduced σ(E). 45Sc deduced GDR strength function, deformation features. Liquid drop model.
doi: 10.1016/0370-2693(93)91276-S
1993VA06 Phys.Lett. 308B, 231 (1993) J.P.S.van Schagen, Y.Alhassid, J.C.Bacelar, B.Bush, M.N.Harakeh, W.H.A.Hesselink, H.J.Hofmann, N.Kalantar-Nayestanaki, R.F.Noorman, A.J.M.Plompen, A.Stolk, Z.Sujkowski, A.van der Woude GDR Dissipation and Nuclear Shape in Hot Fast-Rotating Dy Nuclei NUCLEAR REACTIONS 116Cd(40Ar, X), E=200 MeV; measured Eγ, Iγ, γ-multiplicity; deduced absorption σ(Eγ, E). 156Dy deduced GDR parameters, deformation.
doi: 10.1016/0370-2693(93)91277-T
1992AL16 Nucl.Phys. A549, 12 (1992) The Systematics of the Landau Theory of Hot Rotating Nuclei NUCLEAR STRUCTURE 154Nd; calculated free-energy, moment of inertia surfaces. 166Er; calculated rigid body, inrotational flow moment of inertia surfaces. 160Gd, 160Yb; calculated equilbrium shape trajectories, phase diagrams. 168Hf; calculated phase diagrams; deduced model parameters. Landau theory of hot rotating nuclei.
doi: 10.1016/0375-9474(92)90065-R
1991BU09 Nucl.Phys. A531, 27 (1991) On the Width of the Giant Dipole Resonance in Deformed Nuclei NUCLEAR STRUCTURE 166Er; calculated GDR width. Surface dissipation models, deformed nuclei.
doi: 10.1016/0375-9474(91)90566-O
1990AL04 Nucl.Phys. A509, 461 (1990) Effects of Thermal Fluctuations on Giant Dipole Resonances in Hot Rotating Nuclei NUCLEAR STRUCTURE 160,166Er, 140Ce, 116,108Sn; calculated GDR excitation σ vs energy surface, excitation energy. Thermal fluctuations.
doi: 10.1016/0375-9474(90)90087-3
1990AL25 Nucl.Phys. A514, 434 (1990) Time-Dependent Shape Fluctuations and the Giant Dipole Resonance in Hot Nuclei: Realistic calculations NUCLEAR STRUCTURE 166Er, 112,114Sn; calculated dipole correlation function, Fourier transform. Landau theory.
doi: 10.1016/0375-9474(90)90151-B
1990AL30 Phys.Rev.Lett. 65, 2527 (1990) Orientation Fluctuations and the Angular Distribution of the Giant-Dipole-Resonance γ Rays in Hot Rotating Nuclei NUCLEAR STRUCTURE 90Zr, 92Mo; analyzed (HI, X) reaction data. Macroscopic model, GDR in hot rotating nuclei.
doi: 10.1103/PhysRevLett.65.2527
1989AL09 Phys.Rev.Lett. 63, 31 (1989) Y.Alhassid, J.M.Manoyan, S.Levit Simple Systematics of the Shape Transitions in Hot Rare-Earth Nuclei NUCLEAR STRUCTURE N=70-78; N=86-110; calculated critical temperature vs neutron number for Ce, Nd, Sm, Gd, Dy, Er, Yb, Hf isotopes. Hot rotating nuclei, Landau theory of shape transitions.
doi: 10.1103/PhysRevLett.63.31
1989AL21 Nucl.Phys. A501, 585 (1989) Algebracic Approach to Heavy-Ion Reactions NUCLEAR REACTIONS 24Mg(16O, 16O), (16O, 16O'), (16O, 12C), E(cm)=27.8 MeV; calculated σ(θ). Algebraic approach.
doi: 10.1016/0375-9474(89)90150-4
1989AL26 Phys.Rev.Lett. 63, 2452 (1989) Stochastic Approach to Giant Dipole Resonances in Hot Rotating Nuclei NUCLEAR STRUCTURE 166Er; calculated dipole correlation function Fourier transform. 112Sn; calculated GDR σ(E). Stochastic, microscopic approach, hot rotating nuclei.
doi: 10.1103/PhysRevLett.63.2452
1988AL06 Phys.Lett. 201B, 183 (1988) Y.Alhassid, F.Iachello, B.Shao A Study of Heavy-Ion Reactions in the Algebraic Scattering Theory NUCLEAR REACTIONS 24Mg(16O, 16O), (16O, 16O'), 28Si(12C, 12C), (12C, 12C'), E(cm)=27.8 MeV; calculated σ(θ). Algebraic scattering theory.
doi: 10.1016/0370-2693(88)90208-0
1988AL17 Nucl.Phys. A482, 57c (1988) Landau Theory of Shapes, Shape Fluctuations and Giant Dipole Resonances in Hot Nuclei NUCLEAR STRUCTURE 166,160Er, 140Ce; calculated GDR excitation σ, energy vs temperature. Landau theory.
doi: 10.1016/0375-9474(88)90575-1
1988AL31 Phys.Rev.Lett. 61, 1926 (1988) Thermal Shape Fluctuations, Landau Theory, and Giant Dipole Resonances in Hot Rotating Nuclei NUCLEAR REACTIONS 160,166Er(γ, X), E ≈ 10-20 MeV; calculated photoabsorption σ(E); deduced GDR sensitivity to hot nuclei shape.
doi: 10.1103/PhysRevLett.61.1926
1987AL14 Nucl.Phys. A469, 205 (1987) Y.Alhassid, J.Zingman, S.Levit Landau Theory of Shape Transitions in Hot Rotating Nuclei NUCLEAR STRUCTURE 166Er; calculated shape transitions, phase diagrams, isentropes. Landau theory.
doi: 10.1016/0375-9474(87)90107-2
1986AL12 Phys.Rev.Lett. 57, 539 (1986) Y.Alhassid, S.Levit, J.Zingman Universal Features of Shape Transitions in Hot Rotating Nuclei NUCLEAR STRUCTURE 166Er; calculated phase diagrams vs level energy, spin. Hot rotating nuclei, Landau shape transition theory.
doi: 10.1103/PhysRevLett.57.539
1985AL12 Z.Phys. A321, 677 (1985) Y.Alhassid, G.Maddison, K.Langanke, K.Chow, S.E.Koonin Path Integral Monte Carlo Calculations of 4He and 6Li NUCLEAR STRUCTURE 4He, 6Li; calculated ground state energy, density distributions. Path integral Monte Carlo calculations.
doi: 10.1007/BF01432445
1984LE05 Nucl.Phys. A413, 439 (1984) Phenomenology of Shape Transitions in Hot Nuclei NUCLEAR STRUCTURE 168Yb; calculated free energy vs deformation, temperature. General Landau theory framework.
doi: 10.1016/0375-9474(84)90421-4
1982AL30 Phys.Rev.Lett. 49, 1482 (1982) Y.Alhassid, M.Gai, G.F.Bertsch Radiative Width of Molecular-Cluster States NUCLEAR STRUCTURE 18O; calculated B(λ), electric transition enhancements. Molecular sum rules.
doi: 10.1103/PhysRevLett.49.1482
1979AL22 Phys.Rev. C20, 1789 (1979) Y.Alhassid, R.D.Levine, J.S.Karp, S.G.Steadman Information-Theoretic Analysis of Energy Disposal in Heavy-Ion Transfer Reactions NUCLEAR REACTIONS 232Th(16O, X), E=105 MeV; Mo(14N, X), E=97 MeV; 53Cr(15N, X), E=90 MeV; 232Th(15N, X), E=145 MeV; 232Th(22Ne, X), E=174 MeV; 197Au(16O, X), E=218, 250 MeV; Ni(16O, 12C), E=96 MeV; calculated energy spectra, Q-dependence for X from 7Li to 15O. Constrained statistical approach to multinucleon transfer.
doi: 10.1103/PhysRevC.20.1789
1978LE15 Phys.Rev.Lett. 41, 1537 (1978) R.D.Levine, S.G.Steadman, J.S.Karp, Y.Alhassid Heavy-Ion Transfer Reactions to the Continuum: Surprisal Analysis and The Condition of Maximal Entropy NUCLEAR REACTIONS 232Th(16O, 16N), (16O, 15N), (16O, 14C), (16O, 13C), (16O, 12C), 232Th(16O, 11B), E=105 MeV; measured σ.
doi: 10.1103/PhysRevLett.41.1537
Back to query form |