Emission spectra of XeBr, XeCl, XeF, and KrF

Abstract

The emission spectra of XeBr, XeCl, XeF, and KrF at high pressure are reported and discussed. The spectra were obtained by observing spontaneous emission from electron beam excited mixtures of argon containing lesser amounts of xenon with the halogens or krypton with fluorine. The emitting state in these species is best described as an ionic species Xe+X− or Kr+F−. The wavelengths of these emission bands are in good agreement with a theoretical model in which the ionic binding energy of the noble gas halide ion pair is roughly equal to that of the nearest alkali halide. Our high pressure spectra imply that the lowest potential energy curve for XeF is bound.

A Miniaturized XeCl Dielectric Barrier Discharge as a Source of Short Lived, Fast Decaying UV Radiation

“…The spectrum at 10 mbar is similar to those reported in [23,24] and pressure dependence of the spectra qualitativly agrees with the results in [9]. It is usually assumed [9,24,25] that the difference between the high and low pressure spectra is caused by the formation of the XeCl molecule in vibrationally and rotationally excited states. At low pressure the XeCl molecule emits from those vibrationally and rotationally excited www.cpp-journal.org states whereas at high pressures the XeCl molecule is vibrationally relaxed before emission.…”

Environmental Research Division technical progress report, January 1984-December 1985

“…The spectrum of Figure 5.8, however, does show subtle differences from some previously published spectra (Brau and Ewing 1975;Rohni and Jacob 1982).…”

Absolute Fluorescence Yields from Electron Irradiated Gases: XeBr*

“…36 To establish appropriate time scales for the photon integration measurements of the two formation processes, a series of kinetic measurements were first undertaken. These were determined at the peak 282 nm wavelength, using the fast response detection system.…”