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

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.