Spectroscopic investigation of energetic atoms in a DC hydrogen glow discharge
- 14 September 1990
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 23 (9) , 1168-1174
- https://doi.org/10.1088/0022-3727/23/9/006
Abstract
The analysis of the Doppler profile of the Balmer Halpha line in the cathode sheath and negative glow of a hydrogen glow discharge shows an important concentration of anisotropic energetic atoms. This translational energy is regarded as mainly resulting from reactions including ions accelerated by the cathode sheath electric field. The mechanisms involved are gas-phase charge-exchange collisions producing fast atoms moving toward the cathode and simultaneous neutralisation and backscattering of the ions at the cathode surface leading to energetic atoms moving in the other direction. Quantitative analysis shows that most of the emission of the fast atoms results from excitation directly produced by these ion impact reactions.Keywords
This publication has 21 references indexed in Scilit:
- Electronic and ionic processes and ionic bombardment of the cathode in a DC hydrogen glow dischargeJournal of Physics D: Applied Physics, 1989
- Doppler-broadened Hα line shapes in a rf low-pressure H2 dischargeJournal of Applied Physics, 1987
- Doppler-broadened line shapes of atomic hydrogen in a parallel-plate radio frequency dischargePlasma Chemistry and Plasma Processing, 1985
- Charge transfer into excited states of hydrogen atoms reflected on metal surfacesPhysical Review B, 1984
- Line shapes of atomic hydrogen in hollow-cathode dischargesOptics Letters, 1984
- Positive charge fractions of H, D, and He backscattered from solid surfacesSurface Science, 1980
- Reflection of hydrogen from stainless steel and NbJournal of Nuclear Materials, 1976
- Dissociative excitation of H2: Spectral line shapes and electron impact cross sections of the Balmer linesThe Journal of Chemical Physics, 1976
- Experimental Evidence for New Dissociation Channels in Electron-Impact Ionization ofPhysical Review Letters, 1973
- Ion Energies at the Cathode of a Glow DischargePhysical Review B, 1963