使用SPICE光谱仪改进$^{72}$ Se的$0_2^+\rightarrow0_1^+$ E0跃迁强度的测量
Improved measurement of the $0_2^+\rightarrow0_1^+$ E0 transition strength for $^{72}$Se using the SPICE spectrometer
摘要：
硒同位素位于核图表中一个动荡区域的中心，在那里，形状共存效应与中子-质子配对相关性、三轴性和即将到来的质子滴线纠缠在一起。在这项工作中，$^{72}$硒的内转换电子和$γ$ -射线光谱的研究进行了SPICE和TIGRESS阵列。新的测量的分支比和寿命的$0_2^+$状态产生的测定$ρ^2(E0;0_2^+{\rightarrow}0_1^+)=29(3)$毫单位。进行了两种状态的混合计算，其突出了在形状共存的情况下解释这种$E0$强度值的重要性。
英文摘要：
The selenium isotopes lie at the heart of a tumultuous region of the nuclear chart where shape coexistence effects grapple with neutron-proton pairing correlations, triaxiality, and the impending proton dripline. In this work a study of $^{72}$Se by internal conversion electron and $γ$-ray spectroscopy was undertaken with the SPICE and TIGRESS arrays. New measurements of the branching ratio and lifetime of the $0_2^+$ state were performed yielding a determination of $ρ^2(E0;0_2^+{\rightarrow}0_1^+)=29(3)$ milliunits. two state mixing calculations were performed that highlighted the importance of interpretation of such $E0$ strength values in the context of shape-coexistence.
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