Quantal diffusion description of multinucleon transfers in heavy-ion collisions


Creative Commons License

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

PHYSICAL REVIEW C, cilt.97, sa.5, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 97 Sayı: 5
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1103/physrevc.97.054618
  • Dergi Adı: PHYSICAL REVIEW C
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Ankara Üniversitesi Adresli: Evet

Özet

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 adjustable parameter, includes the effects of shell structure, and is consistent with the fluctuation-dissipation theorem of the nonequilibrium statistical mechanics. As a first application of the approach, we analyze the fragment mass distribution in Ca-48 + U-238 collisions at the center-of-mass energy E-c.m. = 193 MeV and compare the calculations with the experimental data.