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5 papers
Interaction of laser radiation with matter
Efficient two-stage laser enrichment up to 99% of carbon-13 isotope by IR multiphoton dissociation of Freon molecules
V. B. Laptev,
S. V. Pigul'skii Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow
Abstract:
A new method for two-stage laser enrichment of carbon-13 (
13C) by isotope-selective IR multiphoton dissociation of Freon molecules is considered, which makes it possible to achieve a concentration of
13C up to 99% or higher with high productivity. At the first stage, as a result of the selective dissociation of CF
2HCl (Freon-22) molecules, it is expected to obtain a C
2F
4 dissociation product enriched in
13C up to 30 % – 50%. At the second stage, CF
2Br
2 (Freon-12B2) is proposed to be used as a working substance, which is synthesised from enriched C
2F
4, and the enrichment process is carried out by selective deep 'burning-out' of the
12C-containing component. Experiments on multiphoton dissociation of Freon-12B2 with an initial
13CF
2Br
2 concentration of 30% in a mixture with oxygen by pulsed CO
2 laser radiation are performed. It is shown that reaching a
13CF
2Br
2 concentration of no lower than 99% is possible at high values of the elementary separation act parameters: 15% – 18% dissociation yield and 40 – 75 selectivity for
12CF
2Br
2 molecules.
Keywords:
carbon-13, laser enrichment, 13C-enriched Freon-12B2, selective 'burning-out' of a 12C-containing component. Received: 29.11.2021
Accepted: 29.11.2021
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