@Article{JAMS-8-1,
author = {Mingqing, Liu and Zheng, Shu and Li, Bobin and Shilin, Hu and Jing, Chen},
title = {Coulomb Divergence in S-Matrix Expansion of Above-Threshold Ionization},
journal = {Journal of Atomic and Molecular Sciences},
year = {2017},
volume = {8},
number = {1},
pages = {5--9},
abstract = {<p style="text-align: justify;">Photoelectron spectrum of above-threshold ionization (ATI) is calculated using the first two orders of 
Coulomb-Volkov S-matrix series (Faisal, Phys. Rev. A 94, 031401 (2016)). Calculation shows that Coulomb 
divergence, due to singularity of forward scattering, still exists in the first two order terms for an 
unscreened Coulomb potential. This divergence can be removed by adding a decay factor into the phase of 
the S-matrix element which comes from depletion of the atomic ground state. We show that by using an 
example of hydrogen atom, the Coulomb-Volkov S-matrix series can successfully describe the energy spectrum 
of ATI and high-order ATI with the introduction of a deplete rate of the ground state.</p>},
issn = {2079-7346},
doi = {https://doi.org/10.4208/jams.050517.072017a},
url = {https://global-sci.com/article/74197/coulomb-divergence-in-s-matrix-expansion-of-above-threshold-ionization}
}