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NSR database version of April 11, 2024.

Search: Author = O.Yilmaz

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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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2020YI01      Eur.Phys.J. A 56, 37 (2020)

O.Yilmaz, G.Turan, B.Yilmaz

Quasi-fission and fusion-fission reactions in 48Ca+208Pb collisions at Ec.m=190 MeV

doi: 10.1140/epja/s10050-020-00053-8
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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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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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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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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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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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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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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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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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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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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.


2002BA14      Acta Phys.Pol. B33, 691 (2002)

H.Babacan, T.Babacan, A.Gokalp, O.Yilmaz

A Theoretical Study of ρ0-Photoproduction on Nucleons Near Threshold

NUCLEAR REACTIONS 1n, 1H(γ, X), E=1.23-1.92 GeV; calculated ρ0 production σ.


2002BA37      Eur.Phys.J. A 13, 355 (2002)

H.Babacan, T.Babacan, A.Gokalp, O.Yilmaz

ω-Meson Photoproduction on Nucleons in the Near-Threshold Region

NUCLEAR REACTIONS 1H(γ, X), E=1.23, 192 GeV; calculated σ for ω-meson photoproduction, beam asymmetry. Comparison with data, discussion of results with polarized photons and on neutron targets.

doi: 10.1007/s10050-002-8764-7
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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.


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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2000AY02      Europhys.Lett. 50, 22 (2000)

Z.Z.Aydin, O.Yilmaz

Squark-Chargino Production in Polarized Gamma-Proton Collisions at TeV Energy Scale

NUCLEAR REACTIONS 1H(polarized γ, X), E=high; calculated quark-chargino production σ, polarization asymmetry.

doi: 10.1209/epl/i2000-00226-8
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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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1999GO28      J.Phys.(London) G25, 2345 (1999)

A.Gokalp, O.Yilmaz

ΔπN Coupling Constant in Light Cone QCD Sum Rules

doi: 10.1088/0954-3899/25/12/304
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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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1994HO09      Phys.Rev. C49, 3042 (1994)

C.J.Horowitz, O.Yilmaz

Parity Violation in Heavy Nuclei in a Relativistic Hartree-Fock Approximation

NUCLEAR STRUCTURE 207Pb; calculated parity violating matrix element. Relativistic Hartree-Fock approximation.

doi: 10.1103/PhysRevC.49.3042
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1992GO07      Nuovo Cim. 105A, 695 (1992)

A.Gokalp, O.Yilmaz

Core Polarization Effects on the Magnetic Form Factors of 15N and 17O

NUCLEAR REACTIONS 15N, 17O(e, e), E not given; calculated magnetic form factors; deduced core polarization role. Harmonic oscillator shell model, perturbation theory, Sussex interaction matrix elements.


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