中能重离子反应近靶丰中子产物的生成截面放化研究  

Radiochemical Study for Targetlike Products in Reactions Induced by Intermediate Energy Heavy Ion

作　　者：杨维凡[1] 赵之正[1] 李宗伟[1] 谢秀君[1] 孙秀荣[1] 牟万统[1] 秦芝[1] 胡志强[1] 杨永峰[1] 张立[1] 

机构地区：[1]中国科学院近代物理研究所,兰州730000

出　　处：《核物理动态》1993年第2期25-28,共4页

摘　　要：用放射化学和γ谱学技术测量47MeV/u^(12)C同^(133)Cs、^(209)Bi和^(197)Au反应近靶产物的平均截面,得到了低靶产物碘、汞、金和铂的同位素产额分布曲线,发现靶核每减少一个质子其近靶产物最可几质量与靶核之差为4～5个质量单位,靶核(^(133)Cs和^(197)Au)削裂2个质子的产物^(131)I和^(195m)Ir的截面分别为0.47±0.20和0.60±0.10mb。The average formation cross sections of the targetlike residuals produced in theinteractions of 47MeV/u ^(12)C with ^(133)Cs、^(209)Bi and ^(197)Au targets were measured by means of theradiochemical separtion and γ-spectroscopy techniques. The mass-yield curves of I、Hg、Au、Ptisotopes were obtained. It is found that the mass difference between the target nucleus and the mostprobable products for the targetlike isotopes is about 4～5 mass units, every time the target nucleusreduces a proton. The cross-sections of ^(131)I and ^(195m)Ir is 0.67±0.20mb and 0.60±0.10mb whentwo protons are stripped from the target nucleus.

关 键 词：近靶产物 重离子反应 同位素产额 

分 类 号：O571.423[理学—粒子物理与原子核物理]