用γ射线独立测量12 B的Hoyle态$β$
Independent measurement of the Hoyle state $β$ feeding from 12B using Gammasphere
摘要：
使用高纯度康普顿抑制锗探测器阵列，我们进行了一个独立的测量$β$ -衰变分支比从$^{12}\mathrm{B}$的第二个激发态（霍伊尔）在$^{12}\mathrm{C}$。我们的结果是$0.64(11)\%$，这是一个因子$\sim 2$小于以前建立的文献值，但与另一个最近的测量结果一致。这可能表明霍伊尔态比以前认为的更聚集。首次测量了Hoyle态$γ$级联的角关联。这与理论预测是一致的。
英文摘要：
Using an array of high-purity Compton-suppressed germanium detectors, we performed an independent measurement of the $β$-decay branching ratio from $^{12}\mathrm{B}$ to the second-excited (Hoyle) state in $^{12}\mathrm{C}$. Our result is $0.64(11)\%$, which is a factor $\sim 2$ smaller than the previously established literature value, but is in agreement with another recent measurement. This could indicate that the Hoyle state is more clustered than previously believed. The angular correlation of the Hoyle state $γ$ cascade has also been measured for the first time. It is consistent with theoretical predictions.
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