Quantal diffusion description of multinucleon transfers in heavy-ion collisions
Ayik, S.; Yilmaz, B.; Yılmaz, Osman; Umar, A. S. (2018-05-29)
Employing the stochastic mean-field (SMF) approach, we develop a quantal diffusion description of the multi-nucleon transfer in heavy-ion collisions at finite impact parameters. The quantal transport coefficients are determined by the occupied single-particle wave functions of the time-dependent Hartree-Fock equations. As a result, the primary fragment mass and charge distribution functions are determined entirely in terms of the mean-field properties. This powerful description does not involve any adjustab...
YURTSEVER, E (1994-11-01)
Dynamical behavior of a nonlinearly coupled oscillator system is studied under classical and quantal-classical mixed-mode conditions. Classically, the system displays chaos above an energy threshold. However, upon a partial quantization of the problem within a self-consistent-field formalism, the dynamics becomes highly periodic, pointing out to the smoothing process of the quantum mechanics.
Quantal description of instabilities in nuclear matter in a stochastic relativistic model
Yılmaz Tüzün, Özgül; Gokalp, A. (2011-10-01)
Spinodal instabilities and early development of density fluctuations are investigated in the stochastic extension of Walecka-type relativistic mean field including non-linear self-interactions of scalar mesons in the quantal framework. Calculations indicate that at low temperatures T = 0-2 MeV, the initial growth of density fluctuations and hence the initial condensation mechanism occur much faster in quantal calculations than those found in the semi-classical framework. However, at higher temperatures T = ...
Quantal effects on spinodal instabilities in charge asymmetric nuclear matter
Ayik, S.; Er, N.; Yılmaz Tüzün, Özgül; Gokalp, A. (Elsevier BV, 2008-11-01)
Quantal effects on growth of spinodal instabilities in charge asymmetric nuclear matter are investigated in the framework of a stochastic mean field approach. Due to quantal effects, in both symmetric and asymmetric matter, dominant unstable modes shift towards longer wavelengths and modes with wave numbers larger than the Fermi momentum are strongly suppressed. As a result of quantum statistical effects, in particular at lower temperatures, magnitude of density fluctuations grows larger than those calculat...
Quantal diffusion approach for multinucleon transfers in Xe plus Pb collisions
Ayik, S.; Yilmaz, B.; Yılmaz, Osman; Umar, A. S. (2019-07-01)
Employing a quantal diffusion description based on the stochastic mean-field approach, we analyze the mass distribution of the primary fragments in the collisions of the Xe-136 + Pb-208 system at the bombarding energy E-c.m. = 526 MeV. This quantal approach provides a good description of the primary fragment distribution without any adjustable parameter, including the effects of shell structure
Citation Formats
E. YURTSEVER, “QUANTAL-CLASSICAL MIXED MODE DYNAMICS OF COUPLED OSCILLATORS,” 1993, vol. 331, p. 315, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/63876.