标题： 核态密度的奇偶性依赖性在天体物理反应率预测中的重要性 显示英文标题

标题： The Importance of Parity-Dependence of the Nuclear Level Density in the Prediction of Astrophysical Reaction Rates

摘要： 最近推导出了一种简单的描述方法，用于获得pf + g9/2壳层中核能级的宇称分布作为激发能的函数。 我们在此全局核能级密度模型中实现了这一方法。 在统计模型的框架下，计算了铁区的截面和天体物理反应速率，并与基于宇称等分布假设得到的速率进行了比较。 我们发现存在显著差异，尤其是在涉及末态通道中粒子的反应中。 显示英文摘要

摘要： A simple description for obtaining the parity distribution of nuclear levels in the pf + g9/2 shell as a function of excitation energy was recently derived. We implement this in a global nuclear level density model. In the framework of the statistical model, cross sections and astrophysical reaction rates are calculated in the Fe region and compared to rates obtained with the common assumption of an equal distribution of parities. We find considerable differences, especially for reactions involving particles in the exit channel.