摘要
用１４ＭｅＶ中子照射天然Ｙｂ靶，通过１７６Ｙｂ（ｎ，２ｐ）１７５Ｅｒ反应产生了新的重丰中子同位素１７５Ｅｒ，借助Ｘ－γ，γ－γ符合测量方法，首次鉴别出了１７５Ｅｒ，并测得其半衰期为（１．２±０．３）ｍｉｎ．同时还观察到了１７５Ｅｒ衰变所发射的８条新γ射线，建立了１７５Ｅｒ的部分γ衰变纲图，从中指定了１７５Ｔｍ的一个基态转动带．
The 175Er activity was produced via the reaction 176Yb(n, 2p) 175Er by 14MeVneutron irradiation of a natural ytterbium metal target with a thickness of ～ 80mg /cm2.X-γ and γ-γ coincidence measurements were employed to identify 175Er activity.The half-life of 175Er has been determined to be (1.2±0.3)min. Eight new gamma rayswere assigned to the decay of 175Er. A partial decay scheme of 175Er has been proposed for the first time, from which a ground rotational band has been assigned to175Tm.
出处
《高能物理与核物理》
CSCD
北大核心
1996年第8期673-677,共5页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金
中国科学院八五重大项目
