摘要
在 16 6MeV的束流能量下 ,利用重离子熔合蒸发反应14 2 Nd(3 2 S ,1p3nγ) 170 Re布居了170 Re的高自旋激发态 .用 12套带BGO反康普顿抑制的高纯锗探测器阵列进行了在束X -γ和γ -γ符合测量 .基于对实验测量结果及周围邻近核已知信息的综合分析 ,首次建立了双奇核170 Re的转动带能级纲图 .根据实验提取出的准粒子顺排、旋称劈裂等结构特征和Re双奇核同位素带结构系统学知识的比较分析 ,指出该带的准粒子组态是πh11 2 υi13 2 .
High-spin states in doubly odd 170Re have been populated and investigated using 142Nd ( 32S,1p3nγ) 170Re reaction at 166MeV bombarding energy. X-γ and γ-γ-t coincidence measurements have been carried out in the experiment. Based on the coincidence relationships, a rotational band in 170Re has been identified for the first time, extending the high-spin studies of A≈160 odd-odd nuclei to the currently lightest rhenium isotope. The band has been assigned to be built on the π 11/2 υi 13/2 configuration according to their rotational properties in quasiparticle alignment, signature splitting, level spacing systematics, as well as the existing knowledge in neighboring nuclei. Low-spin signature inversion has been suggested for the πh 11/2 υi 13/2 band in 170Re.
出处
《高能物理与核物理》
CSCD
北大核心
2004年第7期699-705,共7页
High Energy Physics and Nuclear Physics
基金
国家杰出青年科学基金 ( 10 0 2 5 5 2 5 )
国家自然科学基金 ( 10 0 5 0 12
1970 5 0 11)
国家重点基础研究发展规划项目 (TG2 0 0 0 0 7740 0 )
中国科学院资助~~
