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Title: Photolytic separation of isotopes in cryogenic solution

Abstract

Separation of carbon isotopes by photolysis of CS/sub 2/ in cryogenic solutions of nitrogen, krypton and argon with 206 nm light from an iodine resonance lamp is reported. The spectral distributionn of the ultraviolet absorption depends on solvent. Thus, in liquid nitrogen the photolytic decomposition rate of /sup 13/CS/sub 2/ is greater than that of /sup 12/CS/sub 2/ (because the absorption of 206 nm radiation is greater for /sup 13/CS/sub 2/), whereas in liquid krypton and liquid argon the reverse is true. The shift in ultraviolet spectrum is a general phenomenon readily characterized as a function of solvent polarizability, and exhibits behavior similar to that for vibrational transitions occurring in the infrared.

Inventors:
; ; ;
OSTI Identifier:
5269929
Assignee:
TIC; ERA-05-029394; EDB-80-084844
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CARBON 12; ISOTOPE SEPARATION; CARBON 13; CARBON SULFIDES; PHOTOLYSIS; ARGON; KRYPTON; LOW TEMPERATURE; NITROGEN; CARBON COMPOUNDS; CARBON ISOTOPES; CHALCOGENIDES; CHEMICAL REACTIONS; CRYOGENIC FLUIDS; DECOMPOSITION; ELEMENTS; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; FLUIDS; ISOTOPES; LIGHT NUCLEI; NONMETALS; NUCLEI; PHOTOCHEMICAL REACTIONS; RARE GASES; SEPARATION PROCESSES; STABLE ISOTOPES; SULFIDES; SULFUR COMPOUNDS; 400203* - Isotope Exchange & Isotope Separation- (-1987); 400500 - Photochemistry

Citation Formats

Freund, S.M., Maier, W.B. II, Holland, R.F., and Battie, W.H. Photolytic separation of isotopes in cryogenic solution. United States: N. p., Web.
Freund, S.M., Maier, W.B. II, Holland, R.F., & Battie, W.H. Photolytic separation of isotopes in cryogenic solution. United States.
Freund, S.M., Maier, W.B. II, Holland, R.F., and Battie, W.H. . "Photolytic separation of isotopes in cryogenic solution". United States.
@article{osti_5269929,
title = {Photolytic separation of isotopes in cryogenic solution},
author = {Freund, S.M. and Maier, W.B. II and Holland, R.F. and Battie, W.H.},
abstractNote = {Separation of carbon isotopes by photolysis of CS/sub 2/ in cryogenic solutions of nitrogen, krypton and argon with 206 nm light from an iodine resonance lamp is reported. The spectral distributionn of the ultraviolet absorption depends on solvent. Thus, in liquid nitrogen the photolytic decomposition rate of /sup 13/CS/sub 2/ is greater than that of /sup 12/CS/sub 2/ (because the absorption of 206 nm radiation is greater for /sup 13/CS/sub 2/), whereas in liquid krypton and liquid argon the reverse is true. The shift in ultraviolet spectrum is a general phenomenon readily characterized as a function of solvent polarizability, and exhibits behavior similar to that for vibrational transitions occurring in the infrared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {},
month = {}
}