输运理论与TDHF的融合：U+U碰撞中的多核子转移
Merging of transport theory with TDHF: multinucleon transfer in U+U collisions
摘要：
在基于随机平均场方法（SMF）的量子扩散描述框架下，研究了$E_\text{c.m.} =833$ MeV能量下${}^{238}\text{U}+{}^{238}\text{U}$系统碰撞中的多核子转移机制.双截面$σ(N,Z)$作为中子和质子数的函数，截面$σ(Z)$和$σ(A)$作为原子序数和质量数的函数计算初级碎片的生产。计算结果表明，${}^{238} \text{U}+{}^{238} \text{U}$体系可能处于不稳定平衡态，其势能面沿$(N,Z)-$平面上的β稳定线具有轻微的负曲率.这种行为可能导致沿β稳定性方向的相当大的扩散。
英文摘要：
Multinucleon transfer mechanism in the collision of ${}^{238}\text{U}+{}^{238}\text{U}$ system is investigated at $E_\text{c.m.} =833$ MeV in the framework of the quantal diffusion description based on the stochastic mean-field approach (SMF). Double cross-sections $σ(N,Z)$ as a function of the neutron and proton numbers, the cross-sections $σ(Z)$ and $σ(A)$ as a function of the atomic numbers and the mass numbers are calculated for production of the primary fragments. The calculation indicates the ${}^{238} \text{U}+{}^{238} \text{U}$ system may be located at an unstable equilibrium state at the potential energy surface with a slightly negative curvature along the beta stability line on the $(N,Z)-$plane. This behavior may lead to rather large diffusion along the beta stability direction.
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