论文标题
同时测定中子诱导的裂变和辐射捕获横截面，该截面是从替代反应获得的衰减概率
Simultaneous determination of neutron-induced fission and radiative-capture cross sections from decay probabilities obtained with a surrogate reaction
论文作者
论文摘要
不稳定核的可靠中子诱导的反应横截面对于核天体物理学和应用至关重要，但是它们的直接测量通常是不可能的。替代反应方法是访问这些横截面的最有希望的替代方法之一。在这项工作中，我们成功地应用了替代反应方法来首次推断中子诱导的裂变和辐射捕获横截面，以一致的方式从单个测量中以一致的方式推断为239PU。这是通过将240PU（4HE，4HE'）替代反应的同时测量的裂变和γ发射概率与角度摩托的计算和在本反应中填充的Angular Momentum和奇偶分布的计算来实现的。尽管其他实验衡量了某些选定的γ射线跃迁的概率，但我们测量了γ发射概率。这扩大了替代反应方法的适用性。
Reliable neutron-induced reaction cross sections of unstable nuclei are essential for nuclear astrophysics and applications but their direct measurement is often impossible. The surrogate-reaction method is one of the most promising alternatives to access these cross sections. In this work, we successfully applied the surrogate-reaction method to infer for the first time both the neutron-induced fission and radiative-capture cross sections of 239Pu in a consistent manner from a single measurement. This was achieved by combining simultaneously-measured fission and gamma-emission probabilities for the 240Pu(4He,4He') surrogate reaction with a calculation of the angular-momentum and parity distributions populated in this reaction. While other experiments measure the probabilities for some selected gamma-ray transitions, we measure the gamma-emission probability. This enlarges the applicability of the surrogate-reaction method.
