population inversion factor
Technical term used in laser physics and quantum electronics to quantify the degree of population inversion.
When determining the conditions for laser oscillation, it is necessary to calculate the population inversion factor.
反転分布 is the general concept of population inversion, while 反転分布係数 is a specific numerical factor derived from it.
Compound of 反転 (inversion), 分布 (distribution), and 係数 (coefficient/factor). A direct calque from English 'population inversion factor'.