中能^(12)C离子轰击铯靶的超靶余核截面测量

TRANSTARGET RESIDUE YIELD MEASUREMENT IN INTERACTION OF 12 C IONS WITH CESIUM TARGETS

用核化学方法测量了入射能量为４７ＭｅＶ／Ａ１２Ｃ离子轰击铯靶的超靶产物钡的生成产额，并用放射化学分离方法和离线γ谱方法进行确定。从测量结果可知，获得的超靶产物的截面都比较大（与低靶产物相比）。而且钡同位素的分布峰位的最可几质量数为Ａｐ＝１２９．７±０．２，其分布宽度参数σＺ＝２．７６±０．

The yields of transtarget products produced in the reaction of 47 MeV/A 12 C ions with cesium compound targets are measured by using nuclear chemical method and the off line γ spectrum techniques.The results show that the transtarget products have bigger reaction cross sections.The peak position of barium isotope distribution is A p=129 7±0 2 and the distribution width parameter is 2 76±0 28.