Amplification of λ ~147-nm radiation from discharge in heavy inert gases

Emission spectra of Xe-X (X = He, Ne, Ar and Kr) and of Kr-Y (Y = He, Ne and Ar) mixtures with low concentrations of the heavier gases (0.1-1%) and moderate total pressures (50-200 hPa) have been recorded near each of the two resonance lines of Xe and Kr in DC glow capillary discharges. The recorded intense emissions have narrow spectral profiles with FWHM of about 0.1 nm. The profiles are very similar in shape to profiles of known high resolution absorption spectra recorded at comparable gas pressures. A tentative identification of the emission structures is given, which involves transitions in heteronuclear molecules and quasimolecules between weakly-bound states.

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<title>The VUV dimer spectra excited in condensed krypton</title>

Gerasimov¹,

Krylov²,

Hallin

2004

SPIE Proceedings

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The vacuum ultraviolet (VUV) emission spectra of krypton homonuclear molecules (dimers) were observed in the wavelength range 120-200 nm. The krypton dimers were excited in a DC capillary discharge and the wall of tube could be cooled with liquid nitrogen. The homogeneous DC discharge was a straight channel in the middle of capillary tube. The gas krypton pressure in the discharge channel could be stabilized in the pressure range from 3 hPa to 1 000 hPa. The DC discharge current density and the electron concentration were -1 0 A/cm2 and '-2-4 1 0 14 cm3, respectively. The VUV krypton spectra excited in vicinity of solid krypton were compared with the spectra recorded without condensed krypton. The VUV spectral lines intensities were observed as nonlinear function of the discharge length. This nonlinear increase of intensity with the length ofthe tube has still to be explained.

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Amplification of λ ~147-nm radiation from discharge in heavy inert gases

Cited by 7 publications

References 5 publications

Optical spectra of binary rare-gas mixtures

Optical spectra of binary rare-gas mixtures

VUV emission spectra from binary rare gas mixtures near the resonance lines of Xe I and Kr I

<title>The VUV dimer spectra excited in condensed krypton</title>

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