Electron-beam pumping conversion into spontaneous emission at the Lyman-alpha line (lambda=121.6 nm) in Ne/H-2 He/H-2 mixtures

摘要

Detailed nonstationary kinetic models for the sources of spontaneous Lyman-alpha radiation (lambda = 121.6 nm) of a hydrogen atom in HeH2, and Ne/H-2 Mixtures are created. The mechanisms of the electron-beam pump energy conversion into the spontaneous radiation are investigated. It is demonstrated that, in Ne/H-2 mixtures, the main excitation mechanism of H (n = 2) involves the reaction of the excitation transfer from the metastable and resonance neon atoms Ne(P-3(0-2), P-1(1)) followed by dissociation of the H-2 molecule. The decrease in the efficiency with increasing hydrogen partial pressure is related to the association of hydrogen atoms in the working state with two H-2 molecules and the subsequent dissociation of the complex into five hydrogen atoms. In the He/H-2 mixture, the key role in H (n = 2) pumping is played by the dissociative recombination of heteronuclear and highly excited homonuclear molecular ions, whose concentration sharply decreases with increasing hydrogen partial [References: 23]