重离子裂变反应碎片角分布

MEASUREMENT OF FISSION FRAGMENT ANGULAR DISTRIBUTION IN HEAVY-IONS INDUCED REACTION

本工作采用固体核径迹探测器和金硅面垒型半导体探测器测量了^(12)C+^((?))Ta,^(197)Au,Pb和^(209)Bi以及^(14)N+Pb裂变反应碎片角分布.还借助于已经发表的若干裂变反应碎片角分布数据,在可裂变参数Z^2/A,激发能E和角动量I较宽的范围内,用碎片角分布统计断点模型分析了重离子裂变反应碎片角分布数据.结果表明,统计断点模型能够解释重离子裂变反应碎片角分布.

The angular distributions of fission fragments for a series of compound nuclei formed in the bombardment of ^(181)Ta, ^(197)Au Pb and ^(209)Bi by ^(12)C ions and in the bombardment of natural lead by ^(14)N ions were measu ed with mica track detectors and gold surface barrier detectors. It is shown that all experimental data for the fission fragment angular distributions can be fitted by the statistical scission model of fission fragment angular distribution.