ATOMIC DENSITY MEASUREMENTS IN NITROGEN, OXYGEN, AND HYDROGEN AFTERGLOW PLASMAS

摘要

Densities of ground-state N, 0 and H atoms, formed by dissociation of the parent molecular gases in dc and of discharges, have been measured over the range 1010 to 1016 cm Sensitive and unambiguous measurements that did not disturb the system under study were made by electron spin resonance (ESR) and atomic resonance absorption spectroscopy (RAS).nSteady-state atomic densities of 1012 to 1016 cm were determined by the BSR method with an absolute accuracy of 20 percent. Quantitative measurements were made by calibration of the atomic ESR resonance lines against an 02 ESR resonance line standard. Densities determined by ESR and by gas titration agreed within 20 per cent.