Study of Pre-equilibrium Fission Based on Diffusion Model |
| |
Authors: | SUN Xiao-Jun ZHANG Jing-Shang |
| |
Affiliation: | 1. College of Physics and Information Technology, GuangxiNormal University, Guilin 541004, China;2. China Institute of Atomic Energy, P.O. Box 275(41), Beijing102413, China |
| |
Abstract: | In terms of numerical method of Smoluchowski equation thebehavior of fission process in diffusion model has been describedand analyzed, including the reliance upon time, as well as the deformationparameters at several nuclear temperatures in this paper. Thefission rates and the residual probabilities inside the saddlepoint are calculated for fissile nucleus n+238U reaction andun-fissile nucleus p+208Pb reaction. The results indicate that there really exists a transient fission process, which means that the pre-equilibrium fission should be taken into account forthe fissile nucleus at the high temperature. Oppositely, thepre-equilibrium fission could be neglected for the un-fissilenucleus. In the certain case the overshooting phenomenon of thefission rates will occur, which is mainly determined by the diffusivecurrent at the saddle point. The higher the temperature is, themore obvious the overshooting phenomenon is. However, the emissionsof the light particles accompanying the diffusion process mayweaken or vanish the overshooting phenomenon. |
| |
Keywords: | pre-equilibrium fission diffusion model fissile nucleus un-fissile nucleus |
本文献已被 万方数据 等数据库收录! |
| 点击此处可从《理论物理通讯》浏览原始摘要信息 |
|
点击此处可从《理论物理通讯》下载全文 |
|