Spectroscopic determination of the isotopic composition of boron trifluoride

Laser Ablation Molecular Isotopic Spectrometry

“…Doppler-free and other high-resolution laser techniques have been detailed in several books [21,22]. Previously, optical spectroscopic techniques for isotopic analysis of both organic and inorganic samples were developed for determination of the light elements, such as hydrogen, boron, carbon, nitrogen, and oxygen [23][24][25][26][27]. These techniques were based on plasma sputtering or pyrolysis of the samples to convert them into a gaseous form, and spectroscopic analysis using radio-frequency discharges as a source of molecular emission excitation.…”

“…Isotopic shifts can be orders of magnitude larger in molecular than atomic spectra [23][24][25][26][27]33] (Figs. 1 and 2).…”

Ferrous metallurgy

“…Spectrographic procedures applied to the determination of oxygen in steel included the use of high capacity discharges (1000 to 2000 microfarads) to enable lines in the visible and near-visible to be used (408), a d.c. arc discharge with a vacuum spectrometer and lines in the vacuum ultraviolet (180), a spectrometric method using an argon atmosphere (504), and hollow cathode discharge tubes (551, 570). GERMANIUM A 7-ray activation analysis procedure was described for determining 0.1 to 10% germanium in iron (2).…”

Emission spectrometry

“…Several papers have appeared in the U.S.S.R. journals on the isotopic method for determination of gases in metals. A review on this subject was written by Zaldel and Petrov (662), Zakorina et al (666) discussed equipment for this purpose, and Aleksandruk, Zhiglinskii, and Khlopina (4) considered the selection of optimum conditions to improve the precision of these determinations.…”