Absorption spectra of e-beam-excited Ne, Ar, and Kr, pure and in binary mixtures
- Lebedev Physics Institute, Leninsky Prospect 53, Moscow 119991 (Russian Federation)
A technique using the broadband emission of a laser plume as probe radiation is applied to record UV-visible (190-510 nm) absorption spectra of Ne, Ar, and Kr, pure and in binary mixtures under moderate e-beam excitation up to 1 MW/cm{sup 3}. In all the rare gases and mixtures, the absorption spectra show continuum related to Rg{sub 2}{sup +} homonuclear ions [peaking at {lambda}{approx}285, 295, and 320 nm in Ne, Ar, and Kr(Ar/Kr), respectively] and a number of atomic lines related mainly to Rg*(ms) levels, where m is the lowest principal quantum number of the valence electron. In argon, a continuum related to Ar{sub 2}* ({lambda}{approx}325 nm) is also recorded. There are also trains of narrow bands corresponding to Rg{sub 2}{sup *}(np{pi} {sup 3}{Pi}{sub g})(leftarrow)Rg{sub 2}{sup *}(ms{sigma} {sup 3}{Sigma}{sub u}{sup +}) transitions. All the spectral features mentioned above were reported in literature but have never been observed simultaneously. Although charge transfer to a homonuclear ion of the heavier additive is commonly believed to dominate in binary rare-gas mixtures, it is found in this study that in Ne/Kr mixture, the charge is finally transferred from the buffer gas Ne{sub 2}{sup +} ion not to Kr{sub 2}{sup +} but to heteronuclear NeKr{sup +} ion.
- OSTI ID:
- 21559930
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 15 Vol. 133; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABSORPTION SPECTRA
ADDITIVES
ARGON
BEAMS
BINARY MIXTURES
CHARGED PARTICLES
DISPERSIONS
ELECTRON BEAMS
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY-LEVEL TRANSITIONS
EXCITATION
FERMIONS
FLUIDS
GASES
IONS
KRYPTON
LASERS
LEPTON BEAMS
LEPTONS
MIXTURES
NEON
NONMETALS
PARTICLE BEAMS
PLUMES
PROBES
RARE GASES
SPECTRA
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA