Radiant energy – Ionic separation or analysis – Methods
Patent
1975-01-02
1977-08-23
Smith, Alfred E.
Radiant energy
Ionic separation or analysis
Methods
250423P, H01J 3934
Patent
active
040442527
ABSTRACT:
Isotopic separation is accomplished by (1) a second photon irradiation step for selective ionization of a first isotopic species and (2) selective precipitation of a generally immiscible liquid from the saturating vapor phase on the ionized species. The first photon corresponds with a sharply defined spectral portion of the irradiation which exclusively excites the first species to a vibrational level. The second photon further excites this species to its ionization level. Selective precipitation is by coulombic attraction between the ionized species and the vapor. The procedure is applicable to any vapor phase ionizable material.
REFERENCES:
patent: 3478204 (1969-11-01), Brubaker et al.
patent: 3624389 (1971-11-01), Cohen et al.
patent: 3772519 (1973-11-01), Levy et al.
patent: 3874858 (1975-04-01), Klugman et al.
"Selective Two-Step (STS) Photoionization of Atoms and Photodissociation of Molecules by Laser Radiation" Ambartzumian et al., Applied Optics, vol. 11 No. 2 Feb. 1972 pp. 354-358.
Anderson B. C.
Bell Telephone Laboratories Incorporated
Indig George S.
Smith Alfred E.
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