TY - JOUR
T1 - Calculation of Differential Cross Sections for Electron Impact Excitation of $H$ and $He^+$
AU - Lai , Zhuo-Jin
AU - Chen , De-Feng
AU - Pan , Lin-Qing
AU - Jiang , Xiao-Han
AU - Xu , Yong-Liang
AU - Chen , Zhang-Jin
JO - Journal of Atomic and Molecular Sciences
VL - 4
SP - 311
EP - 323
PY - 2014
DA - 2014/05
SN - 5
DO - http://doi.org/10.4208/jams.022814.051414a
UR - https://global-sci.org/intro/article_detail/jams/8297.html
KW - electron impact excitation, distorted wave Born approximation, differential cross sections, total cross sections.
AB - <p style="text-align: justify;">We present the distorted wave Born approximation (DWBA) for electron
impact excitation and a method to calibrate the DWBA. With the calibrated DWBA, the
differential cross sections (DCS) for excitation of $H$ and $He^+$ from 1s to 2s and 2p are
calculated and the results are compared with the absolute experimental measurements
for $H$ at incident energies of 50 eV and 100 eV. It has been found that the theoretical
results are in very good agreement with the experiment, which confirms the validity
of the calibration procedure. This work prepares an efficient theoretical method for
numerical simulations of non-sequential double ionization of $He$ in strong laser pulse
in which laser-induced electron impact excitation of $He^+$ is involved.</p>