Open AccessProduction of high-enriched carbon-13 by two-stage laser method
Author(s) -
V. B. Laptev,
S. V. Pigulsky,
V S Mezhevov
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1696/1/012016
Subject(s) - chemistry , dissociation (chemistry) , laser , yield (engineering) , analytical chemistry (journal) , selectivity , freon , isotope , isotope separation , radiochemistry , chromatography , materials science , organic chemistry , physics , quantum mechanics , optics , metallurgy , catalysis
A variant of a two-stage laser process for production highly enriched carbon-13 ( 13 C) with a concentration of more than 99% is being investigated. The first laser stage provides effective enrichment of 13 C up to 30-50% based on the isotopically selective multiphoton dissociation of freon-22 (CF 2 HCl) by pulsed radiation of a CO 2 laser. Then the product of the first stage tetrafluoroethylene, enriched in 13 C, is converted into the working substance of the second stage, freon-12B2 (CF 2 Br 2 ). At the second stage of enrichment, a component with an undesirable isotope 12 C undergoes to selective dissociation, until its concentration in the residual gas decreases to 1% and the concentration of the 13 C isotope is increased to 99%. In preliminary experiments, high parameters of the elementary act of separation were achieved - the dissociation yield of the 12 CF 2 Br 2 up to 20% and selectivity (for 12 C) up to 100. A productivity of the second enrichment stage for a reactor of ideal displacement is estimated, that is 0.6 and 1.2 g 13 C/h for initial concentrations of 13 CF 2 Br 2 30 and 50%, respectively.