所属领域：
钍基熔盐堆核能系统
资源类型：
天文学、地球科学
/ 地质学
文献作者：
PAUL, P
文献发表年份：
1994
文献期刊：
NUCLEAR PHYSICS A
文献摘要：GDR gamma-rays emission in competition with fission by hot compound nuclei is used to to determine characteristic time scales for the fission process which are translated into nuclear dissipation coefficients for collective mass flow. Systematic studies in nuclei from Thorium to Rutherfordium were used to extract separately friction coefficients of compound nuclear fission inside the saddle and from the saddle to the scission point. Above a marked excitation energy threshold between 60 and 80 MeV dissipation is large and equal to full one body dissipation on the outside, possibly even larger inside the saddle. Below this energy dissipation appears to be small. The time scale for quasifission is shown to be almost-equal-to 5 x 10(-21) s, about 1/6 of that of CN fission. The time scale for deep inelastic scattering is too fast to see GDR decay from the colliding system. We compare these results with global models for one- and two-body nuclear dissipation.
文献类型： Article; Proceedings Paper
文献语种： English