标题： 使用后移Bethe公式的核态密度的直接局部参数化 显示英文标题

标题： Direct local parametrization of nuclear state densities using the back-shifted Bethe formula

摘要： 能级密度通常使用后移的贝特公式（BBF）来参数化，适用于具有实验测定的s波中子共振平均间距以及低激发能区完整离散能级序列的原子核。然而，这些参数化方法需要额外建模自旋截断参数随激发能的变化关系。在此，我们通过直接利用实验数据对态密度进行参数化，从而避免了对能级自旋分布建模的需求，因为对于BBF而言，它并不依赖于自旋截断参数。这种方法允许一种独立于自旋截断参数的局部态密度参数化方式。我们将这些参数以表格形式提供，用于核反应计算的应用以及测试微观态密度方法。 显示英文摘要

摘要： Level densities are often parametrized using the back-shifted Bethe formula (BBF) for nuclei that possess experimental data for s-wave neutron resonance average spacings and a complete discrete level sequence at low excitation energies. However, these parametrizations require the additional modeling of the dependence of the spin-cutoff parameter on excitation energy. Here we avoid the need to model the spin distribution of level densities by using the experimental data to parametrize directly the state densities, for which the BBF does not depend on the spin-cutoff parameter. This approach allows for a local parameterization of state densities that is independent of the spin-cutoff parameter. We provide these parameters in a tabulated form for applications in nuclear reaction calculations and for testing microscopic approaches to state densities.