Multinucleon exchange in quasifission reactions

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2015-12-31

Author

Ayik, S.
YILMAZ, BÜLENT
Yılmaz, Osman

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The nucleon exchange mechanism is investigated in the central collisions of Ca-40+U-238 and Ca-48+U-238 systems near the quasifission regime in the framework of the stochastic mean-field (SMF) approach. Sufficiently below the fusion barrier, a dinuclear structure in the collisions is maintained to a large extent. Consequently, it is possible to describe nucleon exchange as a diffusion process familiar from deep-inelastic collisions. Diffusion coefficients for proton and neutron exchange are determined from the microscopic basis of the SMF approach in the semiclassical framework. Calculations show that after a fast charge equilibration the system drifts toward symmetry over a very long interaction time. Large dispersions of proton and neutron distributions of the produced fragments indicate that the diffusion mechanism may help to populate heavy transuranium elements near the quasifission regime in these collisions.

Subject Keywords

Heavy-ion collisions, Transport, Nuclei

URI

https://hdl.handle.net/11511/36803

Journal

PHYSICAL REVIEW C

DOI

https://doi.org/10.1103/physrevc.92.064615

Collections

Department of Physics, Article

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Multinucleon transfer in central collisions of U-238+U-238 Ayik, S.; YILMAZ, BÜLENT; YILMAZ TÜZÜN, ÖZGÜL; Umar, A. S.; Turan, Gürsevil (2017-08-14) Quantal diffusion mechanism of nucleon exchange is studied in the central collisions of U-238 + U-238 in the framework of the stochastic mean-field (SMF) approach. For bombarding energies considered in this work, the dinuclear structure is maintained during the collision. Hence, it is possible to describe nucleon exchange as a diffusion process for mass and charge asymmetry. Quantal neutron and proton diffusion coefficients, including memory effects, are extracted from the SMF approach and the primary fragm...
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Citation Formats

S. Ayik, B. YILMAZ, and O. Yılmaz, “Multinucleon exchange in quasifission reactions,” PHYSICAL REVIEW C, pp. 0–0, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36803.