45Fe核双质子衰变的现象学特征评估
Evaluation of Phenomenological Characteristics of the Two-Proton Decay of the 45Fe Nucleus
浏览论文内容
中文总结 AI 辅助
本研究建立双质子衰变的格林函数形式理论，应用于45Fe双质子衰变，发现衰变特征依赖核势选择，该方法可复现实验数据并为双质子放射性解释提供新框架。
中文摘要 AI 辅助
基于单质子衰变的多粒子理论，发展了一种描述顺序和虚双质子（2p）放射性的格林函数形式理论。在该方法中，双质子发射被视为两个由中间核格林函数连接的连续单质子跃迁，从而可以一致地包含在壳和离壳中间态。推导了总双质子衰变宽度、分宽度以及发射质子角分布的解析表达式。将该形式理论应用于超流核模型中45Fe基态双质子衰变至43Cr基态的过程。计算表明，衰变特征对单粒子核势的选择有显著依赖。研究显示，壳势的恰当选择可以同时复现实验衰变宽度和测得的质子角分布。这些结果表明，所提出的格林函数方法能够一致地描述虚顺序双质子衰变，并为真实双质子放射性的解释提供了另一种框架。
英文摘要
A Green-function formalism describing sequential and virtual two-proton (2p) radi-oactivity is developed on the basis of the multiparticle theory of one-proton decay. In the proposed approach, two-proton emission is treated as two consecutive one-proton transitions connected by the Green's function of the intermediate nucleus, al-lowing both on-shell and off-shell intermediate states to be consistently included. Analytical expressions are derived for the total and partial 2p-decay widths as well as for the angular distribution of the emitted protons. The formalism is applied to the ground-state two-proton decay of 45Fe leading to the ground state of 43Cr within the superfluid nuclear model. Calculations demonstrate a pronounced dependence of the decay characteristics on the choice of the single-particle nuclear potential. It is shown that an appropriate choice of the shell potential allows the experimental decay width and the measured proton angular distribution to be reproduced simultaneously. These results indicate that the proposed Green-function approach provides a consistent description of virtual sequential two-proton decay and offers an alternative framework for the interpretation of true two-proton radioactivity.
