Molecular spectra and optical investigation of dissociation and ionization of simple gases by electron collisions

This paper reports investigations of the VUV emission spectra which are produced by electron impact of simple molecules. Some new features in the emission spectrum of the N₂ molecule are given. Furthermore, new measurements of the dissociative excitation of N₂ and H₂O are reported and the excitation mechanisms are discussed.     

Laser-Excited Fluorescence Spectra of Strontium Monoiodide

Fluorescence spectra of strontium monoiodide excited by Ar++ and Kr+ laser lines have been analyzed by Fourier transform spectrometry. Rotational levels have been populated either directly or after collisional relaxation: (i) in D2Sigma+ (v = 0, 1) by ultraviolet lines of Ar++, inducing numerous fluorescence transitions ending in the levels v = 0-3 of the strongly interacting A2Pi and B2Sigma+ states, (ii) in A2Pi3/2 (v = 0-4) by Kr+ line at 676.44 nm, de-exciting into transitions to X2Sigma+ (v = 0-6). Deperturbed constants for A2Pi and B2Sigma+ states and A approximately B interaction parameter are calculated from the numerical treatment of D2Sigma+ (v = 0, 1) --> A2Pi (v = 0-3) approximately B2Sigma+ (v = 0-3) transitions. Rotational constants for D2Sigma+ (v = 0, 1) are obtained for the first time. The wavenumbers of some 670 fluorescence lines are cataloged. Copyright 1999 Academic Press.     

Fourier spectroscopic investigations of 130Te2 infrared fluorescence and new optically pumped continuous laser lines

Laser-induced fluorescence of ¹³⁰Te₂, excited by Ar⁺ 4765-Å and 4579-Å lines, has been recorded in the infrared by Fourier transform spectrometry. Twelve fluorescence series have been identified and analyzed. A local perturbation has been observed using rotational relaxation lines. With a sealed-off cell of 7 cm leghth at a temperature around 650°C, continuous laser operation on 13 new lines in the range of 0.8 to 1.3 μm has been achieved. Typical threshold pump powers are about 100 mW. Pump and laser transitions are assigned using the obtained Fourier spectroscopic data.