Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1975-11-26
1988-03-29
Terapane, John F.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
20415721, 20415722, B01D 5934
Patent
active
047341777
ABSTRACT:
A process and apparatus for separating isotopes by selective excitation of isotopic species of a volatile compound by tuned laser light. A highly cooled gas of the volatile compound is produced in which the isotopic shift is sharpened and defined. Before substantial condensation occurs, the cooled gas is irradiated with laser light precisely tuned to a desired wavelength to selectively excite a particular isotopic species in the cooled gas. The laser light may impart sufficient energy to the excited species to cause it to undergo photolysis, photochemical reaction or even to photoionize. Alternatively, a two-photon irradiation may be applied to the cooled gas to induce photolysis, photochemical reaction or photoionization. The process is particularly applicable to the separation of isotopes of uranium.
REFERENCES:
patent: 3443087 (1969-05-01), Robieux et al.
patent: 3558877 (1971-01-01), Pressman
patent: 3937956 (1976-02-01), Lyon
patent: 4025790 (1977-05-01), Jetter et al.
Kataev et al., "Spectroscopy of Vapors of Low-Volatility Compounds Supercooled in a Supersonic Stream", Sov. Phys.-JETP, vol. 37, No. 5, (Nov. 1973), pp. 772-777, translation from Zh. Eksp. Teor. Fiz., 64, pp. 1527-1537.
Milne et al., "Molecular Beams in High Temperature Chemistry", In Eyring, Ed. Adv. High Temp. Chem. vol. 2, (1969), pp. 107-150.
Vallach et al., "Transverse Excitation Pulsed Laser in Gas Dynamically Cooled Mixtures", App. Phys. Lett., vol. 20, No. 10, (1972), pp. 395-398.
Farrar et al., "Photochemical Isotope Separation as Applied to Uranium", Report #K-L-3054, Rev. 1, Mar. 15, 1972.
Moore, C. B., "The Application of Lasers to Isotope Separation", in Accounts of Chem. Res., vol. 6, 1973, pp. 323-328.
Kilpin, D. "Isotope Separation Using Laser Excitation", WRE-TM-494, Oct. 1971, Director, Weapons Research Establishment, Box 1424H, G.P.O. Adelaide, S. Australia.
Hodgson, R. T. et al., Isotope Separation Using Laser Light", In IBM Technical Disclosure Bulletin, vol. 17, #11, pp. 3501-3502, Apr. 1975.
Hecht, J., Analog Science Fiction/Science Fact, Sep. 1976, pp. 53-68.
Hagena et al., "Untersuchung der Thermischen Relaxation . . . ", Z. Naturforsch., 15a, (1960), pp. 851-858.
Hartmanshenn et al., "Reduction of Uranium Hexafluoride", Chem. Abstracts, (vol. 75, 1971), Abs. #94217z.
Kidder, "Isotope Separation by Means of Selective Photoexcitation", Lawrence Livermore Labs., QD-7-2-98, (Nov. 1972).
Boyer Keith
Cotter Theodore P.
Greiner Norman R.
Jensen Reed J.
Robinson C. Paul
Caress Virginia B.
Freund Samuel M.
Hightower Judson R.
Terapane John F.
The United States of America as represented by the United States
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