论文标题
美元
$^{57}$Zn $β$-delayed proton emission establishes the $^{56}$Ni $rp$-process waiting point bypass
论文作者
论文摘要
我们测量了国家超导回旋体实验室的$^{57} $ Zn $β$删除质子（$β$ P）和$γ$排放。我们发现$^{57} $ Zn半寿命为43.6 $ \ pm $ 0.2毫秒，$β$ p分支比为（84.7 $ \ pm $ 1.4）％，并确定与外来$β$ - $β$ - $γ$ - $ p $ decay模式相对应的四个过渡，第二个此类标识，是$ f p $ f p $ -sshell in $ f p $ -shell。 $ p/γ$比率用于校正isospin混合，同时通过同质多数质量方程确定$^{57} $ Zn质量。以前，不确定RP过程是否可以绕过教科书等待点$^{56} $ ni，用于与类型I X射线爆发有关的天体物理条件。我们的结果明确地确定了$^{56} $ ni旁路的存在，其中14-17％的$ rp $ - 过程流动了这条路线。
We measured the $^{57}$Zn $β$-delayed proton ($β$p) and $γ$ emission at the National Superconducting Cyclotron Laboratory. We find a $^{57}$Zn half-life of 43.6 $\pm$ 0.2 ms, $β$p branching ratio of (84.7 $\pm$ 1.4)%, and identify four transitions corresponding to the exotic $β$-$γ$-$p$ decay mode, the second such identification in the $f p$-shell. The $p/γ$ ratio was used to correct for isospin mixing while determining the $^{57}$Zn mass via the isobaric multiplet mass equation. Previously, it was uncertain as to whether the rp-process flow could bypass the textbook waiting point $^{56}$Ni for astrophysical conditions relevant to Type-I X-ray bursts. Our results definitively establish the existence of the $^{56}$Ni bypass, with 14-17% of the $rp$-process flow taking this route.
