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NSR database version of May 20, 2024.

Search: Author = B.Yilmaz

Found 23 matches.

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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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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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2019UL01      Phys.Rev. C 100, 054603 (2019)

I.Ulgen, B.Yilmaz, D.Lacroix

Impact of initial fluctuations on the dissipative dynamics of interacting Fermi systems: A model case study

doi: 10.1103/PhysRevC.100.054603
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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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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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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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2014GH01      Phys.Rev. C 89, 014301 (2014)

F.Ghazi Moradi, C.Qi, B.Cederwall, A.Atac, T.Back, R.Liotta, M.Doncel, A.Johnson, G.de France, E.Clement, A.Dijon, R.Wadsworth, T.W.Henry, A.J.Nichols, H.Al-Azri, J.Nyberg, A.Gengelbach, T.Huyuk, B.M.Nyako, J.Timar, D.Sohler, Zs.Dombradi, I.Kuti, K.Juhasz, M.Palacz, G.Jaworski, S.M.Lenzi, P.R.John, D.R.Napoli, A.Gottardo, V.Modamio, A.Di Nitto, B.Yilmaz, O.Aktas, E.Ideguchi

Character of particle-hole excitations in γ-ray angular correlation and linear polarization measurements

NUCLEAR REACTIONS 58Ni(40Ca, 4p)94Ru, E=125 MeV; measured Eγ, Iγ, γγ-, γγ(particle)-coin, γγ(θ)(DCO), γγ(linear polarization) using EXOGAM array for γ rays and DIAMANT array for particles at GANIL facility. 94Ru; deduced high-spin levels, J, π, multipolarity, configurations, hindrance factors for E1 transitions. Comparison with large-scale shell-model (LSSM) calculations.

doi: 10.1103/PhysRevC.89.014301
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2014GH02      Phys.Rev. C 89, 044310 (2014)

F.Ghazi Moradi, B.Cederwall, C.Qi, T.Back, A.Atac, R.Liotta, M.Doncel, A.Johnson, G.de France, E.Clement, J.Nyberg, A.Gengelbach, B.M.Nyako, J.Gal, G.Kalinka, J.Molnar, J.Timar, D.Sohler, Zs.Dombradi, I.Kuti, K.Juhasz, D.R.Napoli, A.Gottardo, V.Modamio, R.Wadsworth, T.W.Henry, A.J.Nichols, H.Al-Azri, M.Palacz, E.Ideguchi, O.Aktas, A.Di Nitto, A.Dijon, T.Huyuk, G.Jaworski, P.R.John, B.Yilmaz

Spectroscopy of the neutron-deficient N = 50 nucleus 95Rh

NUCLEAR REACTIONS 58Ni(40Ca, 3p), E=125 MeV; measured Eγ, Iγ, γγ-, nγ-, (particle)γ-coin, γγ(θ)(DCO), γ(linear polarization) using EXOGAM Ge detector array, Neutron Wall and DIAMANT CsI(Tl) detector arrays at GANIL facility. 95Rh; deduced high-spin levels, J, π, multipolarity, configurations, E1 transition strengths and hindrance factors. Comparison with large-scale shell model (LSSM) calculations in fpg and fpgd model spaces.

doi: 10.1103/PhysRevC.89.044310
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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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2014YI05      Phys.Rev. C 90, 054617 (2014)

B.Yilmaz, D.Lacroix, R.Curebal

Importance of realistic phase-space representations of initial quantum fluctuations using the stochastic mean-field approach for fermions

doi: 10.1103/PhysRevC.90.054617
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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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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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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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2007AB08      Int.J.Mod.Phys. E16, 491 (2007)

Y.Abe, A.Marchix, C.Shen, B.Yilmaz, G.Kosenko, D.Boilley, B.G.Giraud

Dynamics of massive systems and synthesis of superheavy elements

NUCLEAR REACTIONS 208Pb(58Fe, n), E(cm)=210-235 MeV; 132Sn, 160Gd(132Sn, n), (132Sn, 2n), (132Sn, 3n), (132Sn, 4n), E(cm)=265-295 MeV; calculated fusion and evaporation residue σ.

doi: 10.1142/S0218301307005922
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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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