Transport coefficients for modeling fission dynamics

Transport coefficients are important ingredients in dynamical investigations of a nuclear fission process, which determine the dynamical evolution of the fissioning system. The inertia (mass) and friction (dissipation) tensors influence substantially on different observables. The proper calculation of these tensors is a necessary condition for correct modeling of the fission process. The calculation of the inertia and friction tensors is presented for a large variety of nuclear shapes generated by a {c, h, α} parametrization. The inertia tensor is calculated within the Werner-Wheeler approximation for incompressible irrotational flow. The friction tensor is calculated within the one-body and two-body mechanisms of nuclear dissipation. A numerical code is made available, which calculates all these quantities.输运系数（Transport coefficients）是核裂变过程动力学研究的关键组成部分，其决定了裂变系统的动力学演化进程。惯性（质量）张量与摩擦（耗散）张量对各类可观测量均具有显著影响。对这两类张量的精准计算，是实现裂变过程正确建模的必要前提。本文针对由{c, h, α}参数化生成的多种核形状，给出了惯性张量与摩擦张量的计算方法：惯性张量基于不可压缩无旋流的Werner-Wheeler近似（Werner-Wheeler approximation）进行求解；摩擦张量则依托核耗散的单体与双体机制完成计算。此外，本研究还提供了可用于计算上述所有物理量的数值代码。