Absorption by XeCl* excimer molecules of their own emission of the В–Х transition (λ = 308 nm) in a dense Ar–Xe–CCl4 medium upon pumping by fast electrons and uranium-235 fission fragments

Abstract

Luminescence of dense Ar–Xe–CCl₄ gas mixtures with a low CCl₄ content upon pumping by fast electrons and uranium-235 fission fragments is studied by spectroscopic methods. It is found that, in a cell with a resonator tuned to the В–Х transition of the XeCl* molecule (λ = 308 nm), the D-state population of the XeCl* excimer molecule (the D–X transition, λ = 235 nm) depends on the B-state population and increases by many times with increasing B-state population of the XeCl* molecule. The stimulated absorption coefficient k = 1.2 × 10^–16 of В–Х transition emission of the XeCl* molecule (λ_max = 308 nm), which leads to population of the D-state of this molecule, and the coefficient of amplification μ = 2.5 × 10^–4 cm^–1 of В–Х transition emission of the ХеCl* molecule (λ = 308 nm) are measured upon pumping by uranium- 235 fission fragments with the specific energy input into the gas medium of ~60 mJ/cm³ and a specific power of energy input of about 240 W/cm³.