CAJ | 학술논문

利用能量为60-80MeV的12C束流,通过197Au(12C,3n) 206 At反应研究了206At核的高自旋能级结构. 用7台BGO(AC)HPGe探测器和一台用于探测低能γ射线的平面型HPGe探测器进行了γ射线的激发函数、γ-γ-t符合及γ射线的角分布测量. 基于这些测量,首次建立了包括25条γ跃迁的206At高自旋能级纲图. 确定了一个半寿命为(908±400)ns、自旋和宇称为10-的同质异能态. 基于较重的双奇核 208,210At能级结构的系统性,对206At的10-同质异能态进行了讨论.
이용능량위60-80MeV적12C속류,통과197Au(12C,3n) 206 At반응연구료206At핵적고자선능급결구. 용7태BGO(AC)HPGe탐측기화일태용우탐측저능γ사선적평면형HPGe탐측기진행료γ사선적격발함수、γ-γ-t부합급γ사선적각분포측량. 기우저사측량,수차건립료포괄25조γ약천적206At고자선능급강도. 학정료일개반수명위(908±400)ns、자선화우칭위10-적동질이능태. 기우교중적쌍기핵 208,210At능급결구적계통성,대206At적10-동질이능태진행료토론.
The high-spin states of 206At have been studied in the 197Au (12C,3n) 206At reaction at 12C energies from 60 to 80 MeV using technique of in-beam γ-ray spectroscopy. Measurements of γ-ray excitation functions, γ-γ-t coincidences, and γ-ray angular distributions were performed. A level scheme for 206At, including a 10- isomer with a measured half-life of 908±400 ns, was established for the first time. The characteristics of the 10- isomers in doubly odd 206At nuclei were stressed.