CAJ | 학술논문

利用能量为167-175MeV的35Cl束流,通过160Gd(35Cl,5n)熔合蒸发反应研究了190Tl的高自旋态能级结构.实验建立了190Tl基于πh9/2(○×)νi13/2 组态的转动带.在束测量结果和194Bi α衰变的α-γ测量结果确定地指定了190Tl的πh9/2(○×)νi13/2 转动带的自旋值.基于自旋指定,发现了190Tl的πh9/2(○×)νi13/2 扁椭球转动带在低自旋时旋称反转.这是首次在基于πh9/2(○×)νi13/2 组态的扁椭球转动带中观测到旋称反转.考虑了质子-中子剩余相互作用的粒子-转子模型能够解释πh9/2(○×)νi13/2 扁椭球转动带的低自旋旋称反转.
이용능량위167-175MeV적35Cl속류,통과160Gd(35Cl,5n)용합증발반응연구료190Tl적고자선태능급결구.실험건립료190Tl기우πh9/2(○×)νi13/2 조태적전동대.재속측량결과화194Bi α쇠변적α-γ측량결과학정지지정료190Tl적πh9/2(○×)νi13/2 전동대적자선치.기우자선지정,발현료190Tl적πh9/2(○×)νi13/2 편타구전동대재저자선시선칭반전.저시수차재기우πh9/2(○×)νi13/2 조태적편타구전동대중관측도선칭반전.고필료질자-중자잉여상호작용적입자-전자모형능구해석πh9/2(○×)νi13/2 편타구전동대적저자선선칭반전.
High-spin states in 190Tl have been studied experimentally using the 160Gd(35Cl, 5n) fusion-evaporation reaction at beam energies of 167-175 MeV. A rotational band built on the πh9/2(○×)νi13/2 configuration with oblate deformation has been established. Spin values have been firmly assigned to the πh9/2 (○×)νi13/2 oblate band by combining the present in-beam experimental results with the complementary α-γ correlation measurements of 194Bi α decay. With the configuration and spin-parity assignments, the low-spin signature inversion has been revealed for the πh9/2(○×)νi13/2 oblate band. It is the first experimental observation of low-spin signature inversion for a band associated with the oblate πh9/2(○×)νi13/2 configuration. The low-spin signature inversion could be interpreted in the framework of the quasiparticles plus rotor model including a J dependent proton-neutron residual interaction.