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Two-body dissipation effect in nuclear fusion reactions

机译:核融合反应的双体耗散效应

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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.
机译:熔融反应摩擦系数O-16 + O-16 - & 基于时间依赖的Hartree-Fock和时间依赖性密度矩阵方法提取S-32。 通过考虑双体相关的效果,后者超出了平均场近似,但在融合反应的实际模拟中,我们发现总能量不保守。 我们分析了这个问题,提出了一种解决方案,允许清楚地定量动态的耗散效应。 与平均场仿真相比,密度 - 基质方法中的摩擦系数提高了约20%。 还证明了耗散机制的能量依赖性,表明双体碰撞在低入射能量的摩擦方面更有效。

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