Spectroscopy of He-Ne afterglow plasma

摘要

The afterglow of pulsed low-current discharge in a He-Ne mixture is spectroscopically studied under conditions of competition between the processes of Ne-2 (+) and HeNe+ dissociative recombination with electrons, which are the sources of population of excited levels of neon atoms. The behavior of neon spectral lines in the wavelength range of 350-850 nm corresponding to the transitions from the levels of neon atoms of the 2p (5)3p, 2p (5)3d, 2p (5)4p, 2p (5)4d, 2p5(5) s, 2p (5)5d, 2p5(6) s configurations are studied by the multichannel photoncounting method at electron density n (e) < 10(11) cm(-3) and helium and neon pressures P (He) = 38 Torr and P (Ne) ae 10(-5) p (He) Distributions of recombination fluxes and population over excited states of the neon atom formed in the afterglow by homo- and heteronuclear ions are found. The data obtained show that vibrationally excited molecular ions make no noticeable contribution to the spectrum of decaying He-Ne plasma.