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NSR database version of May 22, 2024.

Search: Author = S.Ayik

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2024KA14      Eur.Phys.J. A 60, 79 (2024)

A.Kayaalp, S.E.Ocal, B.Yaprakli, M.Arik, S.Ayik, O.Yilmaz, A.S.Umar

A theoretical study on quasifission and fusion–fission processes in heavy-ion collisions

NUCLEAR REACTIONS 208Pb(58Fe, X), E(cm)=238.5 MeV; 208Pb(50Ti, X), E(cm)=237 MeV; 238U(36S, X), E(cm)=151.1 MeV; calculated the primary mass yields of quasifission fragments with the stochastic mean-field (SMF) technique beyond the time-dependent-Hartree-Fock approach, a statistical de-excitation model, GEMINI++ code.

doi: 10.1140/epja/s10050-024-01303-9
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2023AR15      Phys.Rev. C 108, 064604 (2023)

M.Arik, S.Ayik, O.Yilmaz, A.S.Umar

Description of the multinucleon transfer mechanism for 48Ca + 244Pu and 86Kr + 198Pt reactions in a quantal transport approach

doi: 10.1103/PhysRevC.108.064604
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2023AY01      Phys.Rev. C 107, 014609 (2023)

S.Ayik, M.Arik, O.Yilmaz, B.Yilmaz, A.S.Umar

Multinucleon transfer mechanism in 250Cf + 232Th collisions using the quantal transport description based on the stochastic mean-field approach

NUCLEAR REACTIONS 232Th(250Cf, X), E(cm)=950; calculated drift path of Cf-like fragments in the head-on collision, total kinetic energy, fragments mass and charge distribution yields for different combinations of 250Cf and 232Th orientations, primary and secondary production σ, mean values of neutron and proton numbers of Cf-like fragments, diffusion coefficients. Stochastic mean field approach which provides an extension to the standard time-dependent Hartree-Fock theory by including mean-field fluctuations.

doi: 10.1103/PhysRevC.107.014609
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2023AY04      Phys.Rev. C 108, 054605 (2023)

S.Ayik, M.Arik, E.Erbayri, O.Yilmaz, A.S.Umar

Multinucleon transfer mechanism in 160Gd + 186W collisions in stochastic mean-field theory

doi: 10.1103/PhysRevC.108.054605
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2021AY06      Phys.Rev. C 104, 054614 (2021)

S.Ayik, M.Arik, E.C.Karanfil, O.Yilmaz, B.Yilmaz, A.S.Umar

Quantal diffusion description of isotope production via the multinucleon transfer mechanism in 48Ca + 238U collisions

NUCLEAR REACTIONS 238U(48Ca, X), E(cm)=193 MeV; calculated neutron and proton diffusion coefficients, mean drift path of the projectile-like fragments, neutron, proton, and mixed variances as a functions of time and initial orbital angular momentum, orbital angular momentum, final average total kinetic energy (TKE), average total excitation energy, and scattering angles, mean values of mass and charge numbers of initial and final fragments, combined primary yield of multi-nucleon transfer and binary fission as function fragment mass, isotopic production σ for 238U(48Ca, X), E(cm)=193.1 MeV; calculated production σ for primary and secondary isotopes of A=150-200 Tb, Dy, Ho and Er, A=160-210 Tm, Yb, Lu and Hf, A=170-220 Ta, W, Re and Os, and A=180-230 Ir, Pt, Au and Hg. Methods involved quantal diffusion from stochastic mean-field approach, and transport properties from time-dependent single-particle wave functions of the time-dependent Hartree-Fock theory using statistical GEMINI++ code.

doi: 10.1103/PhysRevC.104.054614
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2020AY06      Phys.Rev. C 102, 024619 (2020)

S.Ayik, B.Yilmaz, O.Yilmaz, A.S.Umar

Merging of transport theory with the time-dependent Hartree-Fock approach: Multinucleon transfer in U + U collisions

NUCLEAR REACTIONS 238U(238U, X), E(cm)=833 MeV; calculated density profile and the geometry of the collisions, values of final masses and charges of the projectile-like and target-like fragments, final orbital angular momentum, total kinetic energy (TKE), total excitation energy, center of mass angle, laboratory scattering angles for tip-tip and side-side collisions, asymptotic values of the neutron, the proton and the mixed dispersions, neutron and proton diffusion coefficients, production σ(N, Z), σ(A), σ(Z) for primary fragments, production σ(A) of gold isotopes averaged over tip-tip and side-side geometries as a function of the mass numbers, and compared with experimental data. 240Cm(236Ra, X), E(cm)=833 MeV; calculated drift path of the radium-like fragments in central collisions, neutron and proton numbers of radium-like fragments as function of time, neutron and proton diffusion coefficients. Multinucleon transfer mechanism treated in the framework of quantal diffusion description based on the stochastic mean-field (SMF) properties derived from the time-dependent Hartree-Fock (TDHF) wave functions.

doi: 10.1103/PhysRevC.102.024619
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2020AY07      Phys.Rev. C 102, 064619 (2020)

S.Ayik, K.Sekizawa

Kinetic-energy dissipation and fluctuations in strongly damped heavy-ion collisions within the stochastic mean-field approach

NUCLEAR REACTIONS 208Pb(136Xe, X), E(cm)=526 MeV; calculated diffusion and friction coefficients for radial linear momentum, total kinetic energy (TKE), and total kinetic energy loss (TKEL) distributions using time-dependent Hartree-Fock (TDHF) and stochastic mean-field (SMF) theories; deduced strongly damped collisions at around the Coulomb barrier.

doi: 10.1103/PhysRevC.102.064619
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2020LA01      Phys.Rev. C 101, 014310 (2020)

D.Lacroix, S.Ayik

Counting statistics in finite Fermi systems: Illustrations with the atomic nucleus

NUCLEAR STRUCTURE 48Ca; analyzed probability (or counting statistics) to find a given number of particles in a finite volume inside normal systems, superfluid systems, and superfluid systems with total particle number restoration using projection operator techniques linked to the characteristic function of the probability distribution; also analyzed transition from Poissonian distribution in the small volume limit to Gaussian fluctuations as the number of particles participating in the fluctuations increases in the interior and at the surface of the system.

doi: 10.1103/PhysRevC.101.014310
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2020SE12      Phys.Rev. C 102, 014620 (2020)

K.Sekizawa, S.Ayik

Quantal diffusion approach for multinucleon transfer processes in the 58, 64Ni + 208Pb reactions: Toward the production of unknown neutron-rich nuclei

NUCLEAR REACTIONS 208Pb(58Ni, X), E(cm)=270 MeV; 208Pb(64Ni, X), E(cm)=268 MeV; calculated average mass and charge of reaction products, total kinetic energy loss (TKEL), contact time, diffusion coefficients and covariances for neutron and proton transfers, and production σ for primary and secondary products using three-dimensional time-dependent Hartree-Fock (TDHF) with Skyrme SLy4d functional, and stochastic mean field (SMF) approaches, supplemented with statistical model GEMINI++.

doi: 10.1103/PhysRevC.102.014620
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2019AY02      Phys.Rev. C 100, 014609 (2019)

S.Ayik, B.Yilmaz, O.Yilmaz, A.S.Umar

Quantal diffusion approach for multinucleon transfers in Xe + Pb collisions

NUCLEAR REACTIONS 136Xe(208Pb, X), 130Te(214Po, X), 138Ce(206Pt, X), E(cm)=526 MeV; calculated distribution of projectile-like and target-like reaction product by mass number and charge for 208Pb+136Xe reaction, neutron and proton diffusion coefficients and drift paths using quantal diffusion approach.

doi: 10.1103/PhysRevC.100.014609
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2019AY06      Phys.Rev. C 100, 044614 (2019)

S.Ayik, O.Yilmaz, B.Yilmaz, A.S.Umar

Heavy-isotope production in 136Xe 208Pb collisions at Ec.m. = 514 MeV

NUCLEAR REACTIONS 208Pb(136Xe, X)210Po/222Rn/224Ra, E(cm)=514 MeV; calculated TKE, excitation energy, scattering angles, mass dispersions toward asymmetry and symmetry directions, production σ for A=110-230 isotopes, and for primary isotopes of Z=84, 86 and 88 as a function of mass number using stochastic mean field (SMF) approach. Comparison with experimental data.

doi: 10.1103/PhysRevC.100.044614
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2018AY03      Phys.Rev. C 97, 054618 (2018)

S.Ayik, B.Yilmaz, O.Yilmaz, A.S.Umar

Quantal diffusion description of multinucleon transfers in heavy-ion collisions

NUCLEAR REACTIONS 238U(48Ca, X), E(cm)=193 MeV; calculated collision density profile, neutron and proton mean-drift path, drift and diffusion coefficients, curvature parameters, covariance of fragment mass distribution, impact parameter, final orbital angular momentum, final average total kinetic energy TKE, average total excitation energy, scattering angles, mass and charge numbers of final fragments, yield and production cross section of primary fragments. Stochastic mean-field (SMF) approach with a quantal diffusion description of the multi-nucleon transfer in heavy-ion collisions at finite impact parameters. Comparison with experimental data.

doi: 10.1103/PhysRevC.97.054618
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2018YI04      Phys.Rev. C 98, 034604 (2018)

B.Yilmaz, S.Ayik, O.Yilmaz, A.S.Umar

Multinucleon transfer in 58Ni + 60Ni and 60Ni + 60Ni in a stochastic mean-field approach

NUCLEAR REACTIONS 60Ni(58Ni, X), (60Ni, X), E(cm)=135.6 MeV; calculated density profiles, neutron and proton diffusion coefficients, one-sided mean drift paths, collision covariances, dispersion per unit mass, and fragment mass distribution using stochastic mean-field (SMF) approach. Comparison with experimental values and time-dependent random-phase approximation (TDRPA) calculations.

doi: 10.1103/PhysRevC.98.034604
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2017AY05      Phys.Rev. C 96, 024611 (2017)

S.Ayik, B.Yilmaz, O.Yilmaz, A.S.Umar, G.Turan

Multinucleon transfer in central collisions of 238U + 238U

NUCLEAR REACTIONS 238U(238U, X), E(cm)=900, 1050 MeV; calculated density profiles in the reaction plane, and mean drift path of the projectile-like fragments using time-dependent Hartree-Fock (TDHF) approach, quantal neutron and proton diffusion coefficients, memory effects and covariances, primary fragment mass distributions using stochastic mean-field (SMF) approach.

doi: 10.1103/PhysRevC.96.024611
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2017TA08      Phys.Rev.Lett. 118, 152501 (2017)

Y.Tanimura, D.Lacroix, S.Ayik

Microscopic Phase-Space Exploration Modeling of 258Fm Spontaneous Fission

RADIOACTIVITY 258Fm(SF); calculated total kinetic energy, product, yields, quadrupole and octupole deformation parameters, neutron multiplicity. Comparison with available data.

doi: 10.1103/PhysRevLett.118.152501
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2016AY06      Phys.Rev. C 94, 044624 (2016)

S.Ayik, O.Yilmaz, B.Yilmaz, A.S.Umar

Quantal nucleon diffusion: Central collisions of symmetric nuclei

NUCLEAR REACTIONS 28O(28O, X), E(cm)=8.7 MeV; 40Ca(40Ca, X), E(cm)=52.7 MeV; 48Ca(48Ca, X), E(cm)=50.7 MeV; 56Ni(56Ni, X), E(cm)=100.0 MeV; calculated quantal and semiclassical neutron and proton diffusion coefficients, effect of Pauli blocking on fragment neutron and proton variances using stochastic mean-field (SMF) approach.

doi: 10.1103/PhysRevC.94.044624
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2016LA12      Eur.Phys.J. A 52, 94 (2016)

D.Lacroix, Y.Tanimura, S.Ayik, B.Yilmaz

A simplified BBGKY hierarchy for correlated fermions from a stochastic mean-field approach

doi: 10.1140/epja/i2016-16094-1
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2015AC03      Phys.Rev. C 92, 034605 (2015)

F.Acar, S.Ayik, O.Yilmaz, A.Gokalp

Growth of spinodal instabilities in nuclear matter. II. Asymmetric matter

doi: 10.1103/PhysRevC.92.034605
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2015AY03      Phys.Rev. C 91, 054601 (2015)

S.Ayik, O.Yilmaz, B.Yilmaz, A.S.Umar, A.Gokalp, G.Turan, D.Lacroix

Quantal description of nucleon exchange in a stochastic mean-field approach

NUCLEAR REACTIONS 40Ca(40Ca, X), E(cm)=52.7 MeV; 48Ca(48Ca, X), E(cm)=50.7 MeV; 56Ni(56Ni, X), E(cm)=99.9 MeV; calculated quantal diffusion coefficient and variance of fragment mass distribution as a function of time in central collision. Stochastic mean-field approach. Comparison with other theoretical calculations.

doi: 10.1103/PhysRevC.91.054601
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2015AY08      Phys.Rev. C 92, 064615 (2015)

S.Ayik, B.Yilmaz, O.Yilmaz

Multinucleon exchange in quasifission reactions

NUCLEAR REACTIONS 238U(40Ca, X), E(cm)=202.0 MeV; 238U(48Ca, X), E(cm)=198.7 MeV; calculated mean drift paths of projectile-like fragments, proton and neutron drift coefficients, diffusion coefficients for proton and neutron exchange, and mass dispersion of the fragment distributions. Dinuclear structure. Stochastic mean-field (SMF) approach with time-dependent Hartree-Fock (TDHF) calculations for systems near the quasifission regime.

doi: 10.1103/PhysRevC.92.064615
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2015YI01      Phys.Rev. C 91, 014605 (2015)

O.Yilmaz, S.Ayik, F.Acar, A.Gokalp

Growth of spinodal instabilities in nuclear matter

doi: 10.1103/PhysRevC.91.014605
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2014LA19      Eur.Phys.J. A 50, 95 (2014)

D.Lacroix, S.Ayik

Stochastic quantum dynamics beyond mean field

NUCLEAR REACTIONS 40Ca(40Ca, x), E(cm)=100 MeV; calculated friction and diffusion coefficients vs relative distance.

doi: 10.1140/epja/i2014-14095-8
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2014YI03      Phys.Rev. C 90, 024613 (2014)

B.Yilmaz, S.Ayik, D.Lacroix, O.Yilmaz

Nucleon exchange in heavy-ion collisions within a stochastic mean-field approach

NUCLEAR REACTIONS 40Ca(40Ca, X), E(cm)=110 MeV; 90Zr(90Zr, X), E(cm)=300 MeV; calculated diffusion coefficients for nucleon exchange, widths of fragment mass distributions, and asymptotic values of cross sections as a function of orbital angular momentum in deep-inelastic symmetric heavy-ion collisions. Stochastic mean-field (SMF) approach. Comparison with predictions of phenomenological nucleon exchange model, and available experimental data.

doi: 10.1103/PhysRevC.90.024613
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2013LA21      Phys.Rev. C 87, 061302 (2013)

D.Lacroix, D.Gambacurta, S.Ayik

Quantal corrections to mean-field dynamics including pairing

doi: 10.1103/PhysRevC.87.061302
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2013YI02      Eur.Phys.J. A 49, 33 (2013)

O.Yilmaz, S.Ayik, F.Acar, S.Saatci, A.Gokalp

Investigations of spinodal dynamics in asymmetric nuclear matter within a stochastic relativistic model

doi: 10.1140/epja/i2013-13033-8
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2012LA09      Phys.Rev. C 85, 041602 (2012)

D.Lacroix, S.Ayik, B.Yilmaz

Symmetry breaking and fluctuations within stochastic mean-field dynamics: Importance of initial quantum fluctuations

doi: 10.1103/PhysRevC.85.041602
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2011AY01      Nucl.Phys. A859, 73 (2011)

S.Ayik, O.Yilmaz, F.Acar, B.Danisman, N.Er, A.Gokalp

Investigations of instabilities in nuclear matter in stochastic relativistic models

doi: 10.1016/j.nuclphysa.2011.04.004
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2011YI02      Phys.Rev. C 83, 064615 (2011)

B.Yilmaz, S.Ayik, D.Lacroix, K.Washiyama

Nucleon exchange mechanism in heavy-ion collisions at near-barrier energies

NUCLEAR REACTIONS 90Zr(40Ca, X), E(cm)=97 MeV; calculated nucleon density profiles, number of nucleon transfer to the target, nucleon drift coefficients, nucleon diffusion coefficients, fragment mass distributions in frameworks of the standard mean-field provided by the TDHF equations and the stochastic mean-field (SMF) approaches.

doi: 10.1103/PhysRevC.83.064615
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2011YI04      Eur.Phys.J. A 47, 123 (2011)

O.Yilmaz, S.Ayik, A.Gokalp

Quantal description of instabilities in nuclear matter in a stochastic relativistic model

doi: 10.1140/epja/i2011-11123-3
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2010AY03      Phys.Rev. C 81, 034605 (2010)

S.Ayik, B.Yilmaz, D.Lacroix

Stochastic semi-classical description of fusion at near-barrier energies

NUCLEAR REACTIONS 58Ni(58Ni, X), 58,64Ni(64Ni, X), E(cm)=85-110 MeV; calculated fusion cross sections using stochastic semi-classical model. Comparison with experimental data and other theoretical calculations.

doi: 10.1103/PhysRevC.81.034605
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2009AY01      Phys.Rev. C 79, 054606 (2009)

S.Ayik, K.Washiyama, D.Lacroix

Fluctuation and dissipation dynamics in fusion reactions from a stochastic mean-field approach

NUCLEAR REACTIONS 40Ca(40Ca, X), E(cm)=100 MeV; calculated density profiles, neck radius, reduced friction coefficient and diffusion coefficient. Stochastic mean-field (SMF) approach using Dissipative-dynamics time-dependent Hartree-Fock method (DD-TDHF).

doi: 10.1103/PhysRevC.79.054606
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2009AY03      Phys.Rev. C 80, 034613 (2009)

S.Ayik, O.Yilmaz, N.Er, A.Gokalp, P.Ring

Spinodal instabilities in nuclear matter in a stochastic relativistic mean-field approach

doi: 10.1103/PhysRevC.80.034613
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2009WA03      Phys.Rev. C 79, 024609 (2009)

K.Washiyama, D.Lacroix, S.Ayik

One-body energy dissipation in fusion reactions from mean-field theory

NUCLEAR REACTIONS 40Ca(40Ca, X), E=55-100 MeV; calculated barrier heights, reduced friction coefficients, number of nucleons transferred, total energy dissipation, occupancy factors for neutron single-particle states and internal excitation energy using DD-TDHF calculations. 40Ca, 48Ca, 208Pb(16O, X), $48Ca, 90Zr(40Ca, X), 48Ca(48Ca, X), E not given; calculated barrier heights and reduced friction coefficients for incident energies near or greater than Coulomb barrier.

doi: 10.1103/PhysRevC.79.024609
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2009WA16      Phys.Rev. C 80, 031602 (2009)

K.Washiyama, S.Ayik, D.Lacroix

Mass dispersion in transfer reactions with a stochastic mean-field theory

NUCLEAR REACTIONS 40Ca(40Ca, X), E(cm)=51, 52.5, 53 MeV; 56Ni(56Ni, X), E(cm)=98, 99.5, 100 MeV; 90Zr(90Zr, X), E(cm)=178, 179, 180 MeV; calculated diffusion coefficients and fragment mass variances in heavy-ion collisions using stochastic mean-field calculations.

doi: 10.1103/PhysRevC.80.031602
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2008AY01      Phys.Lett. B 658, 174 (2008)


A stochastic mean-field approach for nuclear dynamics

doi: 10.1016/j.physletb.2007.09.072
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2008AY06      Nucl.Phys. A812, 44 (2008)

S.Ayik, N.Er, O.Yilmaz, A.Gokalp

Quantal effects on spinodal instabilities in charge asymmetric nuclear matter

doi: 10.1016/j.nuclphysa.2008.08.007
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2005AY01      Phys.Rev. C 71, 054611 (2005)

S.Ayik, B.Yilmaz, A.Gokalp, O.Yilmaz, N.Takigawa

Quantum statistical effects on fusion dynamics of heavy ions

doi: 10.1103/PhysRevC.71.054611
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2004CO10      Nucl.Phys. A738, 108 (2004)

M.Colonna, S.Ayik, V.Baran, Ph.Chomaz, M.Di Toro

Dynamics of cluster formation in liquid-gas phase transitions

NUCLEAR STRUCTURE 36,40,48Ca, 100,120,132Sn; calculated cluster formation arising from unstable collective modes.

doi: 10.1016/j.nuclphysa.2004.04.018
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2004LA07      Prog.Part.Nucl.Phys. 52, 497 (2004)

D.Lacroix, S.Ayik, Ph.Chomaz

Nuclear collective vibrations in extended mean-field theory

doi: 10.1016/j.ppnp.2004.02.002
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2004TA14      Phys.Rev. C 69, 054605 (2004)

N.Takigawa, S.Ayik, K.Washiyama, S.Kimura

Quantum effect in the diffusion along a potential barrier: Comments on the synthesis of superheavy elements

doi: 10.1103/PhysRevC.69.054605
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2004TA29      Prog.Theor.Phys.(Kyoto), Suppl. 154, 192 (2004)

N.Takigawa, T.Rumin, T.Masamoto, T.Takehi, K.Washiyama, S.Ayik

Recent Theoretical Activities of Heavy-Ion Fusion Reactions in Sendai

doi: 10.1143/PTPS.154.192
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2003AY03      Acta Phys.Pol. B34, 4229 (2003)

S.Ayik, A.Gokalp, O.Yilmaz, K.Bozkurt

Collisional effects in isovector response function of nuclear matter at finite temperature

NUCLEAR STRUCTURE 120Sn, 208Pb; calculated GDR strength functions. Comparison with data.

2002CO06      Phys.Rev.Lett. 88, 122701 (2002)

M.Colonna, Ph.Chomaz, S.Ayik

Mechanical and Chemical Spinodal Instabilities in Finite Quantum Systems

NUCLEAR STRUCTURE 36,40,48Ca, 100,120,132Sn; calculated instability regions in phase diagram.

doi: 10.1103/PhysRevLett.88.122701
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2001AY02      Phys.Rev. C64, 024609 (2001)

S.Ayik, Y.Abe

Stochastic One-Body Transport and Coupling to Mean-Field Fluctuations

doi: 10.1103/PhysRevC.64.024609
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2001GO12      Acta Phys.Pol. B32, 835 (2001)

A.Gokalp, O.Yilmaz, S.Yildirim, S.Ayik

Collisional Damping of Giant Dipole Resonance in 120Sn and 208Pb

NUCLEAR STRUCTURE 120Sn, 208Pb; calculated GDR widths vs temperature, role of collisional damping.

2001LA13      Phys.Rev. C63, 064305 (2001)

D.Lacroix, S.Ayik, P.Chomaz

Collective Response of Nuclei: Comparison between experiments and extended mean-field calculations

NUCLEAR STRUCTURE 40Ca, 90Zr, 120Sn, 208Pb; calculated giant resonance response functions; deduced role of coherent and incoherent damping. Comparisons with data.

doi: 10.1103/PhysRevC.63.064305
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2001SC24      Nucl.Phys. A687, 220c (2001)

P.Schuck, S.Ayik

Width of Hot Giant Dipole Resonance

doi: 10.1016/S0375-9474(01)00624-8
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2001YI02      Eur.Phys.J. A 10, 289 (2001)

S.Yildirim, A.Gokalp, O.Yilmaz, S.Ayik

Collisional Damping of Giant Monopole and Quadrupole Resonances

NUCLEAR STRUCTURE 120Sn, 208Pb; calculated giant resonance collisional damping widths vs temperature. Comparisons with data.

doi: 10.1007/s100500170114
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2000AY01      Phys.Rev. C61, 014608 (2000)

S.Ayik, D.Lacroix, P.Chomaz

Fragmentation and Damping of the Collective Response in Extended Random-Phase Approximation

NUCLEAR STRUCTURE 40Ca; calculated monopole, dipole, quadrupole excitations strength distributions; deduced role of coupling to doorway states. Extended time-dependent Hartree-Fock approach.

doi: 10.1103/PhysRevC.61.014608
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2000AY03      Phys.Lett. 493B, 47 (2000)


Extended TDHF with a Coherent Collision Term

doi: 10.1016/S0370-2693(00)01144-8
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2000CH28      Phys.Rev. C62, 024307 (2000)

P.Chomaz, D.Lacroix, S.Ayik, M.Colonna

Collisional Damping and Collisional Coupling in the Nuclear Collective Response

NUCLEAR STRUCTURE 40Ca; calculated isoscalar monopole, GDR strength distributions; deduced role of collective state coupling. Extended temperature-dependent Hartree-Fock theory.

doi: 10.1103/PhysRevC.62.024307
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2000LA30      Phys.Lett. 489B, 137 (2000)

D.Lacroix, P.Chomaz, S.Ayik

Collisional Effects in the Finite Temperature Dipole Response of 120Sn and 208b

NUCLEAR STRUCTURE 120Sn, 208Pb; calculated GDR strength, width and centroid as a function of the temperature. Effect of interaction range and collisional couplings discussed. Time-dependent Hartree-Fock calculations.

doi: 10.1016/S0370-2693(00)00926-6
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2000YI01      Phys.Lett. 472B, 258 (2000)

O.Yilmaz, A.Gokalp, S.Yildirim, S.Ayik

On the Collisional Damping of Giant Dipole Resonance

NUCLEAR STRUCTURE 120Sn, 208Pb; calculated GDR collisional damping widths vs temperature. Comparisons with data.

doi: 10.1016/S0370-2693(99)01434-3
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1999LA15      Nucl.Phys. A651, 369 (1999)

D.Lacroix, P.Chomaz, S.Ayik

On the Simulation of Extended TDHF Theory

doi: 10.1016/S0375-9474(99)00136-0
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1998AY01      Phys.Rev. C58, 1594 (1998)

S.Ayik, O.Yilmaz, A.Gokalp, P.Schuck

Collisional Damping of Nuclear Collective Vibrations in a Non-Markovian Transport Approach

NUCLEAR STRUCTURE 120Sn, 208Pb; calculated GDR collisional damping width vs temperature. Effective Skyrme force. Comparison with data.

doi: 10.1103/PhysRevC.58.1594
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1998LA23      Phys.Rev. C58, 2154 (1998)

D.Lacroix, P.Chomaz, S.Ayik

Finite Temperature Nuclear Response in the Extended Random Phase Approximation

NUCLEAR STRUCTURE 40Ca; calculated isoscalar monopole, isovector dipole, isoscalar quadrupole excitations at finite temperature; deduced collisional damping temperature dependence. Extended random phase approximation.

doi: 10.1103/PhysRevC.58.2154
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1998WE09      Nucl.Phys. A637, 15 (1998)

W.Wen, P.Chau Huu-Tai, D.Lacroix, Ph.Chomaz, S.Ayik

Quantum and Statistical Fluctuations in Dynamical Symmetry Breaking

doi: 10.1016/S0375-9474(98)00225-5
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1997JA04      Nucl.Phys. A617, 356 (1997)

B.Jacquot, M.Colonna, S.Ayik, Ph.Chomaz

RPA Instabilities in Finite Nuclei at Low Density

NUCLEAR STRUCTURE A=40; A=140; calculated unstable collective modes growth rates, transition density parametrization in terms of multipole moments. Finite temperature quantal RPA approach.

doi: 10.1016/S0375-9474(97)00049-3
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1996AB40      Phys.Rep. 275, 49 (1996)

Y.Abe, S.Ayik, P.-G.Reinhard, E.Suraud

On Stochastic Approaches of Nuclear Dynamics

doi: 10.1016/0370-1573(96)00003-8
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1996AY01      Z.Phys. A355, 407 (1996)

S.Ayik, Ph.Chomaz, M.Colonna, J.Randrup

Analysis of Boltzmann-Langevin Dynamics in Nuclear Matter

doi: 10.1007/s002180050130
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1996IV03      Yad.Fiz. 59, No 11, 1966 (1996); Phys.Atomic Nuclei 59, 1895 (1996)

Yu.B.Ivanov, S.Ayik

Relationship between the Boltzmann-Langevin and Boltzmann-Uehling-Uhlenbeck Models

1996JA14      Phys.Lett. 383B, 247 (1996)

B.Jacquot, S.Ayik, Ph.Chomaz, M.Colonna

Fluid Dynamical Approach to Spinodal Instabilities in Finite Nuclear Systems

NUCLEAR STRUCTURE A=50; A=200; calculated unstable finite systems dispersion relations.

doi: 10.1016/0370-2693(96)00736-8
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1995AY01      Phys.Rev. C51, 611 (1995)

S.Ayik, M.Belkacem, A.Bonasera

Non-Markovian Approach to the Damping of Giant Monopole Resonances in Nuclei

NUCLEAR STRUCTURE A=40-210; calculated giant monopole resonances collisional relaxation rates, widths; deduced contribution to damping widths. Semi-classical transport equation.

doi: 10.1103/PhysRevC.51.611
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1995AY02      Phys.Lett. 353B, 417 (1995)

S.Ayik, M.Colonna, Ph.Chomaz

Quantal Effects on Growth of Instabilities in Nuclear Matter

doi: 10.1016/0370-2693(95)00596-D
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1995BE42      Phys.Rev. C52, 2499 (1995)

M.Belkacem, S.Ayik, A.Bonasera

Collisional Damping of Giant Resonances in a Non-Markovian Approach

NUCLEAR STRUCTURE A ≤ 200; calculated GDR, GQR, giant monopole resonances collisional width vs mass. Non-Markovian approach.

doi: 10.1103/PhysRevC.52.2499
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1995IV03      Nucl.Phys. A593, 233 (1995)

Y.B.Ivanov, S.Ayik

Medium-Modified Interaction Induced by Fluctuations

doi: 10.1016/0375-9474(95)00343-Y
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1994AY01      Nucl.Phys. A578, 640 (1994)

S.Ayik, Y.B.Ivanov, V.N.Russkikh, W.Norenberg

Stochastic Multi-Fluid Models for Intermediate-Energy Heavy-Ion Collisions

doi: 10.1016/0375-9474(94)90765-X
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1994AY02      Phys.Rev. C50, 2947 (1994)

S.Ayik, J.Randrup

Effect of Memory Time on the Agitation of Unstable Modes in Nuclear Matter

doi: 10.1103/PhysRevC.50.2947
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1994AY03      Z.Phys. A350, 45 (1994)


Long-Range Correlations in Boltzmann-Langevin Model

doi: 10.1007/BF01285050
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1994BO37      Z.Phys. A349, 119 (1994)

D.Boilley, Y.Abe, S.Ayik, E.Suraud

A Bohr-Mottelson Model of Nuclei at Finite Temperature

doi: 10.1007/BF01291169
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1994RA09      Nucl.Phys. A572, 489 (1994)

J.Randrup, S.Ayik

Simplified Nuclear Boltzmann-Langevin Simulation

doi: 10.1016/0375-9474(94)90186-4
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1994SU26      Nucl.Phys. A580, 323 (1994)

E.Suraud, S.Ayik, M.Belkacem, F.-S.Zhang

On Transient Effects in Violent Nuclear Collisions

NUCLEAR REACTIONS 12C(12C, X), E=60 MeV/nucleon; calculated ensemble averaged quadrupole moment time evolution, other properties; deduced transient behavior role in particle production σ below threshold. Boltzmann-Langevin model.

doi: 10.1016/0375-9474(94)90777-3
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1993BE01      Phys.Rev. C47, R16 (1993)

M.Belkacem, E.Suraud, S.Ayik

K+ Production Far Below the Free Nucleon-Nucleon Threshold in Heavy-Ion Collisions

NUCLEAR REACTIONS 12C(12C, K+X), E > 200 MeV/nucleon; 42Ca(42Ca, K+X), E=90 MeV/nucleon; calculated inclusive K+ production σ. Boltzmann and Boltzmann-Langevin equations simulations.

doi: 10.1103/PhysRevC.47.R16
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1993BO19      Nucl.Phys. A556, 67 (1993)

D.Boilley, E.Suraud, Y.Abe, S.Ayik

Nuclear Fission with a Langevin Equation

NUCLEAR REACTIONS 205At, 248Cf(n, F), E=thermal; calculated fission rate vs temperature, time. Langevin equation.

doi: 10.1016/0375-9474(93)90238-S
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1992AY01      Phys.Lett. 276B, 263 (1992)

S.Ayik, D.Boilley

Damping of Collective Vibrations in a Memory-Dependent Transport Model

NUCLEAR STRUCTURE A ≤ 200; calculated GDR, GQR damping width. 108Sn; calculated giant dipole resonance damping width vs excitations. Memory dependent transport model.

doi: 10.1016/0370-2693(92)90315-U
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1992AY03      Nucl.Phys. A545, 35c (1992)

S.Ayik, E.Suraud, M.Belkacem, D.Boilley

The Boltzmann-Langevin Model for Nuclear Collisions

NUCLEAR REACTIONS 12C(12C, 12C), E=40-100 MeV/nucleon; calculated total quadrupole momentum distribution associated collision rate, diffusion coeffient, mean value, variance time evolutions. 12C(12C, K+X), E ≈ 400-1400 MeV/nucleon; calculated K+ production σ(E). Boltzmann-Langevin model.

doi: 10.1016/0375-9474(92)90444-O
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1992SU10      Nucl.Phys. A542, 141 (1992)

E.Suraud, S.Ayik, M.Belkacem, J.Stryjewski

Applications of Boltzmann-Langevin Equation to Nuclear Collisions

NUCLEAR REACTIONS 12C(12C, X), E=40 MeV/nucleon; calculated quadrupole, octupole moments, momentum distribution mean value time evolution, dispersion. Approximate numerical solutions to Boltzmann-Langevin equations.

doi: 10.1016/0375-9474(92)90403-7
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1988AY03      Phys.Rev. C38, 2610 (1988)

S.Ayik, D.Shapira, B.Shivakumar

Transport Description for Capture Processes in Nuclear Collisions

NUCLEAR REACTIONS 24Mg, 28Si(12C, X), E(cm) ≈ 12-50 MeV; 28Si(14N, X), E(cm) ≈ 12-100 MeV; calculated fusion σ(E). Transport theory.

doi: 10.1103/PhysRevC.38.2610
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1988SH03      Phys.Rev. C37, 652 (1988)

B.Shivakumar, D.Shapira, P.H.Stelson, S.Ayik, B.A.Harmon, K.Teh, D.A.Bromley

28Si + 14N Orbiting Interaction

NUCLEAR REACTIONS 14N(28Si, 14N), E=100 MeV; 14N(28Si, 16O), E=140 MeV; 14N(28Si, 12C), E=100-170 MeV; measured ejectile yields. 28Si(14N, X), E=100-170 MeV; measured orbiting σ(E) for X=10,11B, 11,12,13C, 13,14,15N, 15,16,17O, 17,18,19F, 19,20,21Ne; deduced critical angular momentum.

doi: 10.1103/PhysRevC.37.652
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1987AY01      Phys.Rev. C35, 2086 (1987)


Nucleon Transport Induced by Two-Body Collisions

NUCLEAR REACTIONS 92Mo(92Mo, X), E=22 MeV/nucleon; calculated two-body transport coefficients. Fermi gas model.

doi: 10.1103/PhysRevC.35.2086
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1987SH06      Phys.Rev. C35, 1730 (1987)

B.Shivakumar, S.Ayik, B.A.Harmon, D.Shapira

Equilibrium Model for Fusion and Orbiting

NUCLEAR REACTIONS, ICPND 28Si(12C, X), E(cm)=25-60 MeV; calculated fusion, orbiting σ(E), fragment kinetic energies. Equilibrium model.

doi: 10.1103/PhysRevC.35.1730
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1976AY01      Z.Phys. A279, 145 (1976)

S.Ayik, B.Schurmann, W.Norenberg

Microscopic Transport Theory of Heavy-Ion Collisions. II. Transport Coefficients for Asymmetric Fragmentation and Generalized Einstein Relations

NUCLEAR REACTIONS 58Ni(16O, X), E=92 MeV; 50Ti(32S, X), E=131, 161 MeV; 197Au(40Ar, X), E=288, 340 MeV; 165Ho(84Kr, X), E=714 MeV; 197Au(63Cu, X), E=365, 443 MeV; 232Th(40Ar, X), E=279, 388 MeV; calculated transport coefficients.

doi: 10.1007/BF01437870
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1974AY02      Nucl.Phys. A234, 13 (1974)

S.Ayik, J.N.Ginocchio

Shell Model Level Densities for Light Nuclei

NUCLEAR STRUCTURE 23Na, 23Mg, 26Al, 28Si; calculated yrast lines. 23Na, 23Mg, 27Al, 27,29Si, 29P; calculated levels.

doi: 10.1016/0375-9474(74)90376-5
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