Some features in 4-level generation in LIPLs
Plasma Physics
2025-06-10 v1
Abstract
This paper shows that in Laser-Induced Plasma Lasers (LIPL), the collisionally assisted transitions that lead to the inversion population on an upper-generation level E<sub>up</sub> may be partly forbidden. The spin-orbit coupling may increase the oscillator strength of such transitions. It also demonstrates that collisions between electrons and excited atoms can strongly increase the atoms' energy, creating a population inversion at the E<sub>up</sub> level, which may lie about 1 eV above the pumped level E<sub>pump</sub>. Examples of oscillator strengths and collisional transition rate estimates are provided using linear-response time-dependent density functional theory (TDDFT) in the Casida formalism.
Cite
@article{arxiv.2506.07220,
title = {Some features in 4-level generation in LIPLs},
author = {Lev Nagli and Kirill Kulikov and Dima Cheskis},
journal= {arXiv preprint arXiv:2506.07220},
year = {2025}
}