OAM-RC

Abstract

In some previously published papers we reported the possibility of obtaining nearly monochrome radiation spectra using A.C. /D.C. discharges in electronegative-electropositive gas mixtures at pressures bigger than 20 Torr. We called this effect the M-effect. In order to characterize the effect we introduced the M parameter defined as the ratio of the relative intensities of the radiation of two wavelengths of recorded spectra. One spectral line is called dominant line, having a spectacular growing at the addition of the electronegative gas and the other one is a common spectral line arbitrary chosen from the spectrum, which is considered the reference line. Using this parameter, various recorded spectra can be compared and thus, the M value can be considered a qualitative measure of the M-effect “intensity”. The main mechanism proposed by us which determines the appearance of M-effect is a resonant three-body collision reaction. This type of reaction has one of the largest cross-section known, about 10-12 cm2. According to the magnitude order of the defect energy reaction it can explain the appearance of one dominant spectral line, e.g. (Ne+H2) gas mixture, or at least two dominant spectral lines, e.g. (He+O2/Cl2) or (Ar+H2) gas mixtures.

Keywords

M-effect, Three body reaction, Resonant polar recombination, Defect energy reaction.

Citation

G. MUSA, L. C. CIOBOTARU, New considerations on mechanisms involved in M-effect in electropositive-electronegative gas mixtures, Optoelectronics and Advanced Materials - Rapid Communications, 1, 3, March 2007, pp.137-142 (2007).

Submitted at: Jan. 1, 2007

Accepted at: Feb. 14, 2007