$^{58, 60, 62}$ Ni的$2^+_2 \rightarrow 2^+_1$跃迁中显著$E0$强度的鉴定
Identification of significant $E0$ strength in the $2^+_2 \rightarrow 2^+_1$ transitions of $^{58, 60, 62}$Ni
摘要：
在澳大利亚国立大学（ANU）和肯塔基大学（UK）的一系列测量之后，首次确定了$^{58,60,62}$ Ni的$2^+_2 \rightarrow 2^+_1$跃迁中的$E0$跃迁强度。CAESAR康普顿抑制HPGe阵列和ANU的Super-e螺线管被用来测量质子非弹性散射后每个跃迁的$δ(E2/M1)$混合比和内转换系数。水平半衰期，$δ(E2/M1)$混合比和$γ$ -射线分支比在英国测量后，非弹性中子散射。新的光谱信息用于确定$E0$的规格。这些是第一个$2^+ \rightarrow 2^+$ $E0$过渡强度测量核球形基态和$E0$组件被发现是出乎意料的大，事实上，这些是最大的$E0$过渡强度在中，重核的报告日期。
英文摘要：
The $E0$ transition strength in the $2^+_2 \rightarrow 2^+_1$ transitions of $^{58,60,62}$Ni have been determined for the first time following a series of measurements at the Australian National University (ANU) and the University of Kentucky (UK). The CAESAR Compton-suppressed HPGe array and the Super-e solenoid at ANU were used to measure the $δ(E2/M1)$ mixing ratio and internal conversion coefficient of each transition following inelastic proton scattering. Level half-lives, $δ(E2/M1)$ mixing ratios and $γ$-ray branching ratios were measured at UK following inelastic neutron scattering. The new spectroscopic information was used to determine the $E0$ strengths. These are the first $2^+ \rightarrow 2^+$ $E0$ transition strengths measured in nuclei with spherical ground states and the $E0$ component is found to be unexpectedly large; in fact, these are amongst the largest $E0$ transition strengths in medium and heavy nuclei reported to date.
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