Effective Collision Strengths for Allowed Transitions Among the $n \le$ 5 Degenerate Levels of Atomic Hydrogen

TL;DR

This paper provides detailed calculations of collision strengths and effective collision strengths for allowed transitions in atomic hydrogen up to the n=5 level, covering a wide energy and temperature range for plasma applications.

Contribution

It presents new comprehensive data for collision processes in hydrogen and deuterium, using close-coupling and Born approximations, useful for plasma modeling.

Findings

Data covers energies up to 50 Ryd and temperatures up to 10^7 K.

Results are applicable to various plasma environments, including fusion.

Deuterium results are nearly identical to hydrogen.

Abstract

We report calculations of collision strengths and effective collision strengths for 26 allowed transitions among the $n \le$ 5 degenerate levels of atomic hydrogen for which the close-coupling (CC) and Born approximations have been used. Results are listed over a wide range of energies (up to 50~Ryd) and temperatures (up to 10$^7$~K), sufficient for applications over a variety of plasmas, including fusion. Similar results have also been calculated for deuterium, but they negligibly differ with those of hydrogen.