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NSR database version of April 11, 2024.

Search: Author = A.Bulgac

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2023BU03      Phys.Rev. C 107, 044318 (2023)

A.Bulgac, M.Kafker, I.Abdurrahman

Measures of complexity and entanglement in many-fermion systems

NUCLEAR REACTIONS 235U(n, F), E = low; calculated time dependence of the entropy in the case of induced fission. Constrained self-consistent Hartree-Fock-Bogolyubov (HFB).

NUCLEAR STRUCTURE 236U; calculated occupation numbers for induced fission. Hartree-Fock-Bogolyubov (HFB) and self-consistent superfluid local density approximation (SLDA) solution on the three dimensional spatial lattice for protons and neutrons.

doi: 10.1103/PhysRevC.107.044318
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2023BU05      Phys.Rev. C 107, L061602 (2023)


Entanglement entropy, single-particle occupation probabilities, and short-range correlations

NUCLEAR REACTIONS 235U(n, F), E not given; calculated final proton and neutron canonical occupation probabilities, nonequilibrium time-evolution of the orbital entanglement entropy. Time-dependent density functional theory (DFT). Discussed the influence of presence of short-range correlations on the entanglement properties, the complexity of the many-body wave functions, the single-particle occupation probabilities, and the dynamics of many-body systems.

doi: 10.1103/PhysRevC.107.L061602
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2023BU10      Phys.Rev. C 108, L051303 (2023)


Examining the justification for the introduction of a fermion localization function

doi: 10.1103/PhysRevC.108.L051303
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2023SC16      Phys.Rev. C 108, L061602 (2023)

G.Scamps, I.Abdurrahman, M.Kafker, A.Bulgac, I.Stetcu

Spatial orientation of the fission fragment intrinsic spins and their correlations

doi: 10.1103/PhysRevC.108.L061602
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2022BU05      Phys.Rev.Lett. 128, 022501 (2022)

A.Bulgac, I.Abdurrahman, K.Godbey, I.Stetcu

Fragment Intrinsic Spins and Fragments' Relative Orbital Angular Momentum in Nuclear Fission

NUCLEAR REACTIONS 235U, 239Pu(n, F), E not given; analyzed available data. 236U, 240Pu; calculated of the primary fission fragment intrinsic spins and of the fission fragments relative orbital angular momentum using the time-dependent density functional theory framework.

RADIOACTIVITY 252Cf(SF); analyzed available data; calculated of the primary fission fragment intrinsic spins and of the fission fragments relative orbital angular momentum using the time-dependent density functional theory framework.

doi: 10.1103/PhysRevLett.128.022501
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2022BU06      Phys.Rev. C 105, L021601 (2022)


Pure quantum extension of the semiclassical Boltzmann-Uehling-Uhlenbeck equation

NUCLEAR REACTIONS 238U(238U, F), E(cm)=1500 MeV;236U(236U, F), E not given; calculated time-dependent proton and neutron occupation probabilities. Time-dependent superfluid local density approximation with SeaLL1 EDF.

doi: 10.1103/PhysRevC.105.L021601
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2022BU11      Phys.Rev. C 105, 044601 (2022)

A.Bulgac, I.Abdurrahman, G.Wlazlowski

Sensitivity of time-dependent density functional theory to initial conditions

NUCLEAR REACTIONS 238U(238U, F), E(cm)=1200 MeV; time evolution of the neutron and proton number densities of fissioning system, temperature of the fission fragments. Time-dependent density-functional theory.

doi: 10.1103/PhysRevC.105.044601
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2022BU19      Phys.Rev. C 106, 014624 (2022)


Angular correlation between the fission fragment intrinsic spins

RADIOACTIVITY 240Pu, 252Cf(SF); calculated fission fragment intrinsic spins, fission fragments relative orbital angular momentum. Showed the correlation between intrinsic spins of the fission fragments for a system with initial spin 0+. Time-dependent density functional theory (TDDFT).

doi: 10.1103/PhysRevC.106.014624
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2021BU03      Phys.Rev.Lett. 126, 142502 (2021)

A.Bulgac, I.Abdurrahman, S.Jin, K.Godbey, N.Schunck, I.Stetcu

Fission Fragment Intrinsic Spins and Their Correlations

RADIOACTIVITY 236U, 240Pu(SF); calculated fission fragment intrinsic spins and their correlations using two nuclear energy density functionals.

doi: 10.1103/PhysRevLett.126.142502
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2021BU12      Phys.Rev. C 104, 054601 (2021)


Restoring broken symmetries for nuclei and reaction fragments

doi: 10.1103/PhysRevC.104.054601
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2021ST18      Phys.Rev.Lett. 127, 222502 (2021)

I.Stetcu, A.E.Lovell, P.Talou, T.Kawano, S.Marin, S.A.Pozzi, A.Bulgac

Angular Momentum Removal by Neutron and γ-Ray Emissions during Fission Fragment Decays

NUCLEAR REACTIONS 235U, 239Pu(n, F), E thermal; 238U(n, F), E=1.9 MeV; analyzed available data; deduced the angular momentum removal from fission fragments through neutron and γ-ray emission, wide angular momentum removal distributions can hide any underlying correlations in the fission fragment initial spin values.

RADIOACTIVITY 252Cf(SF); analyzed available data; deduced the angular momentum removal from fission fragments through neutron and γ-ray emission.

doi: 10.1103/PhysRevLett.127.222502
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2020BA14      Acta Phys.Pol. B51, 605 (2020)

M.C.Barton, S.Jin, P.Magierski, K.Sekizawa, G.Wlazlowski, A.Bulgac

Pairing Dynamics in Low-Energy Nuclear Collisions

doi: 10.5506/APhysPolB.51.605
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2020BU12      Phys.Rev. C 102, 034612 (2020)


Pre-equilibrium neutron emission in fission or fragmentation

doi: 10.1103/PhysRevC.102.034612
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2020BU16      Phys.Rev. C 102, 044609 (2020)


Fission-fragment excitation energy sharing beyond scission

NUCLEAR REACTIONS 235U, 240Pu(n, F), E not given; calculated intrinsic energies, TKE and dipole moments of fission fragments (FFs) as a function of separation between fission fragments using a simplified, classical and realistic model; deduced that FFs exchange up to several MeV of excitation energy after the cessation of nucleon exchange, and beyond scission.

doi: 10.1103/PhysRevC.102.044609
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2019BU15      Phys.Rev. C 100, 014615 (2019)

A.Bulgac, S.Jin, I.Stetcu

Unitary evolution with fluctuations and dissipation

RADIOACTIVITY 258Fm(SF); calculated fission fragment mass yield distribution, total kinetic energy (TKE) distribution. 240Pu(SF); calculated fission trajectory in the quadrupole-octupole (Q20-Q30) plane. Quantum hydrodynamics equations using time dependent density functional theory with and without dissipation and fluctuation of collective degrees of freedom. Comparison with experimental data.

doi: 10.1103/PhysRevC.100.014615
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2019BU19      Phys.Rev. C 100, 034612 (2019)


Projection of good quantum numbers for reaction fragments

doi: 10.1103/PhysRevC.100.034612
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2019BU20      Phys.Rev. C 100, 034615 (2019)

A.Bulgac, S.Jin, K.J.Roche, N.Schunck, I.Stetcu

Fission dynamics of 240Pu from saddle to scission and beyond

NUCLEAR REACTIONS 239Pu(n, F), E=thermal, 2, 4, 5.5 MeV; calculated fission pathway for 240Pu along the mass quadrupole moment Q20 using SeaLL1, SkM*, and UNEDF1 energy density functionals (EDFs), contours of neutron and proton densities, magnitudes and phases of neutron and proton pairing fields, snapshots of the induced fission of 240Pu with enhanced pairing strength, fission trajectories using SeaLL1 and SkM* EDFs, initial excitation energy, TKE, neutron and proton numbers, excitation energies of the heavy and light fission fragments (FFs), total excitation energy of FFs, average saddle-to-scission times, internal temperatures for the light and heavy FFs, average neutron multiplicity emitted by FFs as a function of incident neutron energy, time evolution of quadrupole Q20 and octupole Q30 moments of the light and heavy FFs before and after scission, number of neutrons emitted predominantly after scission; deduced minor effect of pairing strength on the fission dynamics. Calculations based on time-dependent superfluid local density approximation (TDSLDA), with no limit on pairing . Comparison with experimental data for average neutron multiplicities.

doi: 10.1103/PhysRevC.100.034615
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2018BU07      Phys.Rev. C 97, 044313 (2018)

A.Bulgac, M.McNeil Forbes, Sh.Jin, R.Navarro-Perez, N.Schunck

Minimal nuclear energy density functional

ATOMIC MASSES Z=8-120, N=10-160, A=16-270; calculated ground-state energies, binding energies/nucleon, Coulomb, surface and symmetry energy/nucleon, contribution to the ground-state energies of the terms quartic in isospin density for 2375 nuclei, S(2n) and S(2p) for 606 even-even nuclei, and compared with AME-2012 data; calculated radii for 345 even-even nuclei. 48Ca, 208Pb; calculated proton and charge densities, and single particle energies for various orbitals. 240Pu; calculated potential energy surface, and fission pathway. N<300, Z<120; calculated proton and neutron driplines. Minimal nuclear energy density functional (NEDF) method called "SeaLL1". Comparison with other theoretical calculations.

doi: 10.1103/PhysRevC.97.044313
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2018GR08      Acta Phys.Pol. B49, 591 (2018)

J.Grineviciute, P.Magierski, A.Bulgac, S.Jin, I.Stetcu

Accuracy of Fission Dynamics Within the Time-dependent Superfluid Local Density Approximation

NUCLEAR STRUCTURE 240Pu; calculated fission time evolution (energy and quadrupole moment vs time) using Time-Dependent Superfluid Local Density Approximation (TDSLDA).

doi: 10.5506/aphyspolb.49.591
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2017BU13      Phys.Rev.Lett. 119, 052501 (2017)

A.Bulgac, S.Jin

Dynamics of Fragmented Condensates and Macroscopic Entanglement

doi: 10.1103/PhysRevLett.119.052501
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2017JI01      Phys.Rev. C 95, 044302 (2017)

S.Jin, A.Bulgac, K.Roche, G.Wlazlowski

Coordinate-space solver for superfluid many-fermion systems with the shifted conjugate-orthogonal conjugate-gradient method

NUCLEAR STRUCTURE 40Ca, 62Ni, 102Zr, 208Pb, 240Pu; calculated ground states and various densities such as particle number, spin, current, kinetic energy for a nuclear system, and saddle point constrained fission path for 240Pu; nuclei served as benchmarks for calculations using shifted conjugate orthogonal conjugate-gradient (COCG) Krylov method.

doi: 10.1103/PhysRevC.95.044302
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2016BU04      Phys.Rev.Lett. 116, 122504 (2016)

A.Bulgac, P.Magierski, K.J.Roche, I.Stetcu

Induced Fission of 240Pu within a Real-Time Microscopic Framework

RADIOACTIVITY 240Pu(SF) [from 239Pu(n, X)240Pu, E low]; calculated fissioning dynamics parameters, fission fragments properties, negligible role the collective inertia in the fully nonadiabatic treatment of nuclear dynamics, where all collective degrees of freedom (CDOF) are included.

doi: 10.1103/PhysRevLett.116.122504
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2016WL01      Phys.Rev.Lett. 117, 232701 (2016)

G.Wlazlowski, K.Sekizawa, P.Magierski, A.Bulgac, M.McNeil Forbes

Vortex Pinning and Dynamics in the Neutron Star Crust

doi: 10.1103/PhysRevLett.117.232701
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2015ST01      Phys.Rev.Lett. 114, 012701 (2015)

I.Stetcu, C.A.Bertulani, A.Bulgac, P.Magierski, K.J.Roche

Relativistic Coulomb Excitation within the Time Dependent Superfluid Local Density Approximation

NUCLEAR REACTIONS 238U(238U, 238U'), E not given; calculated the total energy spectrum of emitted electromagnetic radiation, damping resonance width. Goldhaber-Teller model.

doi: 10.1103/PhysRevLett.114.012701
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2014WL01      Phys.Rev.Lett. 113, 182503 (2014)

G.Wlazlowski, J.W.Holt, S.Moroz, A.Bulgac, K.J.Roche

Auxiliary-Field Quantum Monte Carlo Simulations of Neutron Matter in Chiral Effective Field Theory

doi: 10.1103/PhysRevLett.113.182503
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2013BO19      Comput.Phys.Commun. 184, 085101 (2013)

S.Bogner, A.Bulgac, J.Carlson, J.Engel, G.Fann, R.J.Furnstahl, S.Gandolfi, G.Hagen, M.Horoi, C.Johnson, M.Kortelainen, E.Lusk, P.Maris, H.Nam, P.Navratil, W.Nazarewicz, E.Ng, G.P.A.Nobre, E.Ormand, T.Papenbrock, J.Pei, S.C.Pieper, S.Quaglioni, K.J.Roche, J.Sarich, N.Schunck, M.Sosonkina, J.Terasaki, I.Thompson, J.P.Vary, S.M.Wild

Computational nuclear quantum many-body problem: The UNEDF project

NUCLEAR REACTIONS 3He(d, p), 7Be(p, γ), E<1MeV; 172Yb, 188Os, 238U(γ, X), E<24 MeV; calculated σ. Comparison with experimental data.

NUCLEAR STRUCTURE 100Zr; calculated quadrupole deformation parameter, radii, neutron separation energy.

doi: 10.1016/j.cpc.2013.05.020
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2013BU06      Phys.Rev. C 87, 051301 (2013)

A.Bulgac, M.McNeil Forbes

Use of the discrete variable representation basis in nuclear physics

doi: 10.1103/PhysRevC.87.051301
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2011ST24      Phys.Rev. C 84, 051309 (2011)

I.Stetcu, A.Bulgac, P.Magierski, K.J.Roche

Isovector giant dipole resonance from the 3D time-dependent density functional theory for superfluid nuclei

NUCLEAR REACTIONS 172Yb, 188Os, 238U(γ, n); calculated time-dependent proton and neutron occupation probabilities, photo-absorption cross sections for isovector giant dipole resonances. Fully symmetry-unrestricted time-dependent density functional theory for two Skyrme force parametrizations SkP and SLy4. Comparison with experimental data.

doi: 10.1103/PhysRevC.84.051309
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2008BA29      Phys.Rev. C 78, 014318 (2008)

A.Baran, A.Bulgac, M.McNeil Forbes, G.Hagen, W.Nazarewicz, N.Schunck, M.V.Stoitsov

Broyden's method in nuclear structure calculations

doi: 10.1103/PhysRevC.78.014318
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2004BU06      Int.J.Mod.Phys. E13, 147 (2004)

A.Bulgac, Y.Yu

Superfluid LDA (SLDA): Local Density Approximation for systems with superfluid correlations

doi: 10.1142/S0218301304001874
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2004MA51      Acta Phys.Pol. B35, 1203 (2004)

P.Magierski, A.Bulgac

Nuclear Hydrodynamics in the Inner Crust of Neutron Stars

2004MA55      Nucl.Phys. A738, 143 (2004)

P.Magierski, A.Bulgac

Nuclear structure and dynamics in the inner crust of neutron stars

doi: 10.1016/j.nuclphysa.2004.04.023
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2003MA51      Nucl.Phys. A719, 217c (2003)

P.Magierski, A.Bulgac, P.-H.Heenen

Exotic nuclear phases in the inner crust of neutron stars in the light of Skyrme-Hartree-Fock theory

doi: 10.1016/S0375-9474(03)00921-7
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2003YU01      Phys.Rev.Lett. 90, 161101 (2003)

Y.Yu, A.Bulgac

Spatial Structure of a Vortex in Low Density Neutron Matter

doi: 10.1103/PhysRevLett.90.161101
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2003YU03      Phys.Rev.Lett. 90, 222501 (2003)

Y.Yu, A.Bulgac

Energy Density Functional Approach to Superfluid Nuclei

NUCLEAR STRUCTURE Z=20-82; calculated one- and two-nucleon separation energies in semimagic nuclei. Energy density functional approach.

doi: 10.1103/PhysRevLett.90.222501
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2002BU02      Phys.Rev.Lett. 88, 042504 (2002)

A.Bulgac, Y.Yu

Renormalization of the Hartree-Fock-Bogoliubov Equations in the Case of a Zero Range Pairing Interaction

NUCLEAR STRUCTURE 110Sn; calculated neutron pairing field vs radial coordinate and cutoff energy. HFB equations, renormalization procedure for zero range pairing interaction.

doi: 10.1103/PhysRevLett.88.042504
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2002BU14      Phys.Rev. C65, 051305 (2002)


Local Density Approximation for Systems with Pairing Correlations

doi: 10.1103/PhysRevC.65.051305
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2001BU10      Nucl.Phys. A683, 695 (2001); Erratum Nucl.Phys. A703, 892 (2002)

A.Bulgac, P.Magierski

Quantum Corrections to the Ground State Energy of Inhomogeneous Neutron Matter

doi: 10.1016/S0375-9474(00)00450-4
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2001BU12      Acta Phys.Pol. B32, 1099 (2001)

A.Bulgac, P.Magierski

Shell Effects in Bubble Nuclei, Atomic Clusters, and Inhomogeneous Neutron Matter

2001BU25      Bull.Rus.Acad.Sci.Phys. 65, 141 (2001)

A.Bulgac, V.R.Shaginyan

Effect of Coulomb Correlations on the Single-Particle Spectrum of Atomic Nuclei

2001MA78      Acta Phys.Pol. B32, 2713 (2001)

P.Magierski, A.Bulgac

Selected Aspects of Physics of Fermionic Bubbles

2000YU01      Phys.Rev.Lett. 84, 412 (2000)

Y.Yu, A.Bulgac, P.Magierski

Shell Correction Energy for Bubble Nuclei

doi: 10.1103/PhysRevLett.84.412
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1999BU20      Eur.Phys.J. A 5, 247 (1999)

A.Bulgac, V.R.Shaginyan

Influence of Coulomb Correlations on the Location of Drip Line, Single Particle Spectra and Effective Mass

doi: 10.1007/s100500050282
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1999BU34      Phys.Lett. 469B, 1 (1999)

A.Bulgac, V.R.Shaginyan

Proton Single-Particle Energy Shifts Due to Coulomb Correlations

doi: 10.1016/S0370-2693(99)01262-9
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1997BE53      Phys.Rev.Lett. 79, 3539 (1997)

G.F.Bertsch, A.Bulgac

Comment on ' Spontaneous Fission: A kinetic approach '

doi: 10.1103/PhysRevLett.79.3539
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1997BU21      Phys.Rev. C56, 3307 (1997)

A.Bulgac, G.A.Miller, M.Strikman

Chiral Limit of Nuclear Physics

doi: 10.1103/PhysRevC.56.3307
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1996BU20      Nucl.Phys. A601, 103 (1996)

A.Bulgac, V.R.Shaginyan

A Systematic Surface Contribution to the Ground-State Binding Energies

NUCLEAR STRUCTURE 16O, 40Ca, 208Pb; calculated Coulomb exchange, correlation energy. 15,17O, 17F, 15N, 39,41Ca, 39K, 41Sc; calculated mirror nuclei Coulomb displacement energies; deduced weak perturbative interaction role.

doi: 10.1016/0375-9474(96)00094-2
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1996BU34      Phys.Lett. 383B, 127 (1996)

A.Bulgac, J.M.Thompson

The Shape of the Fermi Surface

doi: 10.1016/0370-2693(96)00726-5
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1995BU40      Pisma Zh.Eksp.Teor.Fiz. 62, 833 (1995); JETP Lett. 62, 843 (1995)

A.Bulgac, V.R.Shaginyan

A Systematic Contribution to the Binding Energy of Nuclei

1989BU15      Phys.Rev. C40, 1073 (1989)


Configurational Quasidegeneracy and the Liquid Drop Model

NUCLEAR STRUCTURE 16O, 40Ca; analyzed model calculations; deduced degeneracy features.

doi: 10.1103/PhysRevC.40.1073
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1982BU19      Nuovo Cim. 70A, 142 (1982)

A.Bulgac, S.Holan, F.Carstoiu, O.Dumitrescu

Fermi-Liquid Model of Alpha-Decay

RADIOACTIVITY 210Bi, 210Po, 202,206,210Rn, 208,210,212,214Ra; calculated α-decay width. Fermi liquid model, Pauli principle, new universal constant.

doi: 10.1007/BF02902943
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1982BU26      Rev.Roum.Phys. 27, 331 (1982)

A.Bulgac, F.Carstoiu, O.Dumitrescu

Interionic Double Folding Yukawa Interaction Potential

NUCLEAR REACTIONS 208Pb(16O, 16O), (116Sn, 116Sn), (α, α), 116Sn(66Zn, 66Zn), E not given; calculated nucleus-nucleus double folding potential characteristics. Semi-analytical form.

1981BU01      Nucl.Phys. A355, 321 (1981)

A.Bulgac, M.B.Zhalov, L.A.Sliv, M.Ya.Amusia

The Excitation of the Giant Resonances with Fast Protons

NUCLEAR REACTIONS 40Ca, 56Ni(p, p'), E=1 GeV; calculated σ(Ep', θ); deduced giant resonance excitation characteristics. Glauber approach, RPA wave functions, Skyrme interaction.

doi: 10.1016/0375-9474(81)90530-3
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