发表机构
Beihang University; Pusan National University; Institute for Basic Science（北京航空航天大学; 釜山国立大学; 基础科学研究院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过DRHBc和RCHB理论结合WKB近似计算71≤Z≤83奇Z核的质子发射半衰期，发现形状共存会显著影响半衰期，且半衰期由受形变影响的谱因子而非共存极小值总能量差决定。
AI 中文摘要
单质子发射是质子滴线附近核结构的直接探针，在理解奇特衰变模式与核合成过程中发挥关键作用。本研究采用连续谱下的形变相对论哈特利-福克-博戈留波夫理论（DRHBc）得到的核势，结合WKB近似，计算71 ≤ Z ≤ 83奇Z核的单质子发射体半衰期，并与相对论连续谱哈特利-福克-博戈留波夫理论（RCHB）的结果对比。我们首先将计算得到的半衰期与现有实验数据对比，发现通过DRHBc引入的四极形变几乎未改善形变核的半衰期预测。研究的所有核素基态的|β₂,DRHBc|均小于0.15，在该有限形变范围内，谱因子对半衰期的贡献远大于衰变宽度，是主导因素。特别地，对于DRHBc中存在形状共存的核素（如¹⁷⁰Au），其半衰期会因四极形变对谱因子的影响而显著变化，我们推测形状共存会对半衰期的变化产生重要影响。最后，我们结合形状共存讨论了半衰期，结果表明计算得到的半衰期并非由共存极小值之间的总能量差决定，而是由受形变影响的谱因子决定。
英文摘要
One-proton emission is a direct probe of nuclear structure near the proton drip line and plays a critical role in understanding exotic decay modes and nucleosynthesis processes. In this study, we investigate the half-lives of one-proton emitters for $71 \leq Z \leq 83$ odd-$Z$ nuclei by employing the WKB approximation with nuclear potentials obtained from the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) and, for comparison, the relativistic continuum Hartree-Bogoliubov theory (RCHB). We first compare the calculated half-lives with available experimental data. The inclusion of quadrupole deformation via the DRHBc hardly contributes to improving the predictions of half-lives for the deformed nuclei. We find that all the studied nuclei exhibit ground states with $|β_{2,{\rm DRHBc}}| < 0.15$, and within this limited deformation range the spectroscopic factor provides the dominant contribution to the half-life, compared to the decay width. In particular, for nuclei exhibiting shape coexistence in DRHBc, such as $^{170}$Au, where the half-life varies significantly with the quadrupole deformation through its effect on the spectroscopic factor, we expect shape coexistence to exert a substantial influence on the variation of half-lives. Finally, we discuss the half-lives in consideration of shape coexistence. Our results indicate that the calculated half-life is governed not by the total-energy difference between coexisting minima but rather by the spectroscopic factor influenced by the deformation.
