论文标题
多光子使用R-Matrix方法高于多电子原子和分子的阈值电离
Multi-photon above threshold ionization of multi-electron atoms and molecules using the R-matrix approach
论文作者
论文摘要
我们根据多电子分子R-Matrix形式主义制定了一种计算有效的时间独立的方法。该方法用于计算在扰动场的影响下原子和分子多光子电离的过渡矩阵元素。该方法依赖于空间的分区，这使我们能够在外部区域分析地分析无限范围的无限无偶极子积分，而不是初始边界波函数的范围。这种方法对于任意秩序有效，即在频谱的结合和连续部分中吸收的任何数量的光子（低于和高于阈值电离）。我们计算了不同系统（H，HE，H2，CO2）的广义多光子横截面和角度分布，并通过与文献数据进行比较来验证我们的方法。
We formulate a computationally efficient time-independent method based on the multi-electron molecular R-matrix formalism. This method is used to calculate transition matrix elements for the multi-photon ionization of atoms and molecules under the influence of a perturbative field. The method relies on the partitioning of space which allows us to calculate the infinite-range free-free dipole integrals analytically in the outer region, beyond the range of the initial bound wave function. This approach is valid for an arbitrary order, that is, any number of photons absorbed both in the bound and the continuum part of the spectrum (below- and above-threshold ionization). We calculate generalized multi-photon cross sections and angular distributions of different systems (H, He, H2, CO2) and validate our approach by comparison with data from the literature.
