【摘要】 使用47MeV/u12C离子轰击133Cs靶,由多核子转移反应产生Ba同位素。使用放射化学方法,从133Cs和反应产物中分离出产物Ba,再使用高纯Ge探测器测量Ba放射性同位素的γ活性,根据Ba同位素的活度和其他相关数据,确定Ba同位素的产生截面。通过分析测得的Ba同位素的厚靶平均产生截面,发现缺中子Ba同位素的独立截面不遵从规则的Qgg系统性。该结果可用重离子碰撞中的次级过程加以解释。更多还原

【Abstract】 133Cs was irradiated with 47 MeV/u 12C ions and Ba isotopes were produced via multi-nucleon transfer process in bombardments of 133Cs with 12C. Ba produced in the reaction was separated radio-chemically from Cs and the mixture of the reaction products. The γ radio-activities of Ba isotopes were measured using an HPGe detector. The production cross sections of Ba isotopes were determined from activities of Ba isotopes and the other relational data. It is found that for neutron-deficient Ba isotopes the production cross sections deviate from a linear dependence on Qgg values. The fact demonstrates that neutron-deficient isotopes of Ba may come from the second process in the reaction.更多还原