The ratio of \begin{document}$\gamma$\end{document} transition-intensities from the initial capture state to low-lying states may represent the model-independent \begin{document}$\gamma$\end{document} -strength function, which reflects the effects of different neutron-capture reaction mechanisms. The extraordinary quenching of the \begin{document}$\gamma_{0}$\end{document} transition from the p-wave neutron radiative capture in \begin{document}$^{57}$\end{document} Fe is observed, for the first time, from the pronounced enhancement of the \begin{document}$\gamma$\end{document} -strength function ratios \begin{document}$f_{\gamma_{1}}/f_{\gamma_{0}}$\end{document} and \begin{document}$f_{\gamma_{2}}/f_{\gamma_{0}}$\end{document} . The 2p-1h doorway excitation leads to suppression of the \begin{document}$\gamma_{0}$\end{document} transition to the ground state and the enhancement of the \begin{document}$\gamma_{1}$\end{document} and \begin{document}$\gamma_{2}$\end{document} transitions to the first and second excited states, respectively. The \begin{document}$fp$\end{document} sub-shells supply the exact number of spaces required for the 2p-1h configuration, which features the neutron capture mechanism in the vicinity of A = 55.

中文翻译：

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γ 跃迁淬火由 p 波中子激发引起的 2p-1h 门道机制

\begin{document}$\gamma$\end{document} 从初始捕获状态到低洼状态的转换强度的比率可能代表与模型无关的 \begin{document}$\gamma$\end{document} -强度函数，反映不同中子俘获反应机制的影响。来自 \begin{document}$^{57}$\end{document} Fe 中 p 波中子辐射捕获的 \begin{document}$\gamma_{0}$\end{document} 跃迁的非凡猝灭是首次观察到 \begin{document}$\gamma$\end{document} -strength 函数比率 \begin{document}$f_{\gamma_{1}}/f_{\gamma_ {0}}$\end{document} 和 \begin{document}$f_{\gamma_{2}}/f_{\gamma_{0}}$\end{document} 。2p-1h 门口激发导致\begin{document}$\gamma_{0}$\end{document} 向基态转变的抑制和\begin{document}$\gamma_{1}$ 的增强\end{document} 和 \begin{document}$\gamma_{2}$\end{document} 分别转换到第一和第二激发态。\begin{document}$fp$\end{document} 子壳提供 2p-1h 配置所需的确切数量的空间，该配置在 A = 55 附近具有中子捕获机制。