中能^(12)C+^(197)Au产物中Ir的同位素分布观测  

Isotope Distribution of Ir Produced in Intermediate Energy 12C on 197Au

作　　者：赵之正[1] 胡志强[1] 杨维凡[1] 李宗伟[1] 孙秀荣[1] 秦芝[1] 杨永锋[1] 牟万统[1] 谢秀君[1] 张立[1] 袁双贵[1] 吴定清[1] 蔡喜臣[1] 

机构地区：[1]中国科学院近代物理研究所

出　　处：《高能物理与核物理》1997年第5期402-407,共6页High Energy Physics and Nuclear Physics

摘　　要：以１２￣Ｃ（４７ＭｅＶ／ｕ）＋１９７￣Ａｕ靶，通过化学分离及γ谱学方法获得了Ｉｒ和Ｐｔ同位素产额。用测到的Ｐｔ累积产额对相应Ｉｒ同位素做了照射期内母体衰变修正，从而获得了很好的Ｉｒ同位素分布。讨论了Ａ＞１７０丰中子核产生截面、截面的Ｑｇｇ系统性和剩余激发能的问题。Yields of lr isotopes from 12C (47MeV/u) +197Au have been measured by using chemical separation and γ spectroscopy method. The lr isotope distribution was ob tained after correction for decay during the irradiation period by using the accutnulation yields of Pt. The cross sections of A>170 neutron - rich isotopes , the Qgg systematics of cross sections and the residual excitation energy of target - like frafpnents are discussed.

关 键 词：同位素分布 截面预言 核剩余激发能 铱同位素 

分 类 号：O614.825[理学—无机化学]