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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 distribution 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:
 [1];  [2];  [2];  [2]
  1. (Santa Fe, NM)
  2. (Los Alamos, NM)
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
865673
Patent Number(s):
4554060
Assignee:
United States of America as represented by United States (Washington, DC) LANL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
photolytic; separation; isotopes; cryogenic; solution; carbon; photolysis; cs; solutions; nitrogen; krypton; argon; 206; nm; light; iodine; resonance; lamp; reported; spectral; distribution; ultraviolet; absorption; depends; solvent; liquid; decomposition; rate; 13; 12; radiation; reverse; true; shift; spectrum; phenomenon; readily; characterized; function; polarizability; exhibits; behavior; similar; vibrational; transitions; occurring; infrared; spectral distribution; liquid nitrogen; nm radiation; nm light; ultraviolet absorption; liquid argon; /204/

Citation Formats

Freund, Samuel M., Maier, II, William B., Holland, Redus F., and Beattie, Willard H. Photolytic separation of isotopes in cryogenic solution. United States: N. p., 1985. Web.
Freund, Samuel M., Maier, II, William B., Holland, Redus F., & Beattie, Willard H. Photolytic separation of isotopes in cryogenic solution. United States.
Freund, Samuel M., Maier, II, William B., Holland, Redus F., and Beattie, Willard H. Tue . "Photolytic separation of isotopes in cryogenic solution". United States. https://www.osti.gov/servlets/purl/865673.
@article{osti_865673,
title = {Photolytic separation of isotopes in cryogenic solution},
author = {Freund, Samuel M. and Maier, II, William B. and Holland, Redus F. and Beattie, Willard 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 distribution 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 = {1985},
month = {1}
}

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