Two-body dissipation effect in nuclear fusion reactions

被引:17
|
作者
Wen, Kai [1 ]
Barton, M. C. [1 ]
Rios, Arnau [1 ]
Stevenson, P. D. [1 ]
机构
[1] Univ Surrey, Fac Engn & Phys Sci, Guildford GU2 7XH, Surrey, England
关键词
ONE-BODY DISSIPATION; HARTREE-FOCK APPROXIMATION; DENSITY-MATRIX FORMALISM; PARTICLE COLLISIONS; DYNAMICS; TDHF;
D O I
10.1103/PhysRevC.98.014603
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
Friction coefficients for the fusion reaction O-16 +O- 16 -> S-32 are extracted based on both the time-dependent Hartree-Fock and the time-dependent density matrix methods. The latter goes beyond the mean-field approximation by taking into account the effect of two-body correlations, but in practical simulations of fusion reactions we find that the total energy is not conserved. We analyze this problem and propose a solution that allows for a clear quantification of dissipative effects in the dynamics. Compared to mean-field simulations, friction coefficients in the density-matrix approach are enhanced by about 20%. An energy dependence of the dissipative mechanism is also demonstrated, indicating that two-body collisions are more efficient at generating friction at low incident energies.
引用
收藏
页数:8
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