论文标题
来自Migdal效应的原子电离的精确预测和新见解
Precise predictions and new insights for atomic ionisation from the Migdal effect
论文作者
论文摘要
通过原子核散射中性颗粒可以通过称为Migdal效应的过程导致电子电离和激发。我们使用Dirac-Hartree-fock方法对Migdal效应的先前计算进行了重新访问和改进，以计算原子波函数。我们的方法不依赖于偶极近似的使用，从而使我们能够为比以前更高的核后坐力速度提出强大的结果。我们的计算为使用中子源对Migdal效应的未来测量提供了理论基础，并在直接检测实验中寻找暗物质。我们表明，在快速中子的实验中必须考虑多个电离，并得出了在定义的能量阈值以上的硬电子过程中的过程中的半包含概率。我们介绍了包括氙气以及碳，氟，硅和锗在内的贵族元素的结果。我们的计算中的过渡概率公开可用。
The scattering of neutral particles by an atomic nucleus can lead to electronic ionisation and excitation through a process known as the Migdal effect. We revisit and improve upon previous calculations of the Migdal effect, using the Dirac-Hartree-Fock method to calculate the atomic wavefunctions. Our methods do not rely on the use of the dipole approximation, allowing us to present robust results for higher nuclear recoil velocities than was previously possible. Our calculations provide the theoretical foundations for future measurements of the Migdal effect using neutron sources, and searches for dark matter in direct detection experiments. We show that multiple ionisation must be taken into account in experiments with fast neutrons, and derive the semi-inclusive probability for processes that yield a hard electron above a defined energy threshold. We present results for the noble elements up to and including xenon, as well as carbon, fluorine, silicon and germanium. The transition probabilities from our calculations are publicly available.
