摘要
利用能量为170MeV的35Cl束流,通过157Gd(35Cl,4n)熔合蒸发反应研究了188Tl的高自旋态能级结构.依据实验结果建立了188Tl基于πh9/2(?)vi13/2组态的转动带.根据双奇Tl核能级结构的相似性,指定了188Tlπh9/2(?)vi13/2扁椭球转动带的自旋值.结果表明在188Tl中,πh9/2(?)vi13/2扁椭球转动带在低自旋区具有旋称反转性质.利用包含了质子-中子剩余相互作用的准粒子-转子模型,定性地解释了πh9/2(?)vi13/2扁椭球转动带的低自旋区旋称反转现象.
High-spin Level structure of lSST1 has been studied via ^187TGd(^35Cl,4n) fusion-evaporation reaction at beam energy of 170MeV. A rotational band built on the πh9/2×νi13/2 configuration with oblate deformation has been established. Spin values have been proposed to the πh9/2×νi13/2 oblate band based on the similarities between the oblate band of ^188Tl and those in odd-odd ^190-200Tl. With the spin assignments, the low-spin signature inversion has been revealed for the πh9/2×νi13/2 oblate band of ^188Tl. The low-spin signature inversion can be interpreted qualitatively in the framework of the quasi-particles plus rotor model including a J dependent p-n residual interaction.
出处
《高能物理与核物理》
CSCD
北大核心
2006年第5期402-404,共3页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金(10475097
10221003)中国科学院百人计划项目中国科学院基金资助~~
关键词
转动带
旋称反转
准粒子-转子模型
扁椭球形变
rotational band, signature inversion, quasi-particles plus rotor model, oblate deformation