论文标题
$β$衰减的$^{132} $ in和$^{132} $ sn的光谱和$^{131} $ sb带有Griffin光谱仪
$β$ Decay of $^{132}$In and Spectroscopy of $^{132}$Sn and $^{131}$Sb with the GRIFFIN Spectrometer
论文作者
论文摘要
双重魔术$^{132} _ {50} $ sn $ _ {82} $的光谱与$^{132} _ {132} _ {49} $ in $ _ {83} $的$^$衰减之后，已使用Triumf-ISac的Griffin Spectrometer进行了。该分析允许在$^{132} $ sn中总共将70个过渡和29个激动的状态放置。详细的光谱也已在$^{131} $ sb上进行，这是由$^$^{131} $ sn产生的，它是由$β$ delayed的中子衰减产生的$^{132} $ in in in in in in $^{131} $ sb。 $^{131} $ sn和$^{131} $ sb的$γ$ -rays的测量导致了$β$ - 删除的中子排放概率的确定，$ p_ {n} $，从$^{132} $中。这是第一次使用$γ$光谱对该核测量$ p_ {n} $，新值12.3（4）％与最近的$β-N $计数实验一致。此外，$γ$ - $γ$ Angular相关性是在$^{132} $ sn中进行的，支持了几个激发态的旋转分配。提出了描述几个激发态的新型从头算计算，并将其与实验频谱进行了比较。
Spectroscopy of doubly magic $^{132}_{50}$Sn$_{82}$ has been performed with the GRIFFIN spectrometer at TRIUMF-ISAC following the $β$ decay of $^{132}_{49}$In$_{83}$. The analysis has allowed for the placement of a total of 70 transitions and 29 excited states in $^{132}$Sn. Detailed spectroscopy has also been performed on $^{131}$Sb, resulting from the $β$ decay of $^{131}$Sn, produced from the $β$-delayed neutron decay of $^{132}$In. Measurement of $γ$-rays in both $^{131}$Sn and $^{131}$Sb has led to the determination of the $β$-delayed neutron emission probability, $P_{n}$, from $^{132}$In. This is the first time the $P_{n}$ has been measured for this nucleus using $γ$ spectroscopy, and the new value of 12.3(4)% is consistent with the most recent $β-n$ counting experiment. Additionally, $γ$-$γ$ angular correlations have been performed in $^{132}$Sn, supporting the spin assignments of several excited states. Novel ab initio calculations are presented which describe several of the excited states, and these are compared to the experimental spectrum.
