A Method to Deal With the Heavy Ion Induced Fission Based on Diffusion Model

The fission rate of 240Pu at its saddle point is obtained by using generalized coherentstate ansatz for large friction case. The numerical results indicate that the quasi-stationary fiss-ion rate approaches Kramers’ rate and the transient behaviour agrees with that given in previousstudies. Moreover, the relationship between the first eigenvalue λ1 and the quasi-stationary fiss-ion rate λqs is derived. In the case of high temperature, we also pay attention to the overshoot-ing.

广义相干态方法在重核裂变中的应用

在大粘滞性条件下,Fokker—planck方程可转化为Smoluchowski方程。本文用广义相干态方法求解了Smoluchowski方程,计算了重核^(240)pu在鞍点处的裂变速率。