Atomic vapor laser isotope separation of lead-210 isotope

Details Atomic vapor laser isotope separation of lead-210 isotope Atomic vapor laser isotope separation of lead-210 isotope

1997-05-27

1999-08-31

Gorgos, Kathryn

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

20415721, 20415722, 2041573, B01D 500

Patent

active

059456493

ABSTRACT:
An isotopically selective laser process and apparatus for removal of Pb-210 from natural lead that involves a one-photon near-resonant, two-photon resonant excitation of one or more Rydberg levels, followed by field ionization and then electrostatic extraction. The wavelength to the near-resonant intermediate state is counter propagated with respect to the second wavelength required to populate the final Rydberg state. This scheme takes advantage of the large first excited state cross section, and only modest laser fluences are required. The non-resonant process helps to avoid two problems: first, stimulated Raman Gain due to the nearby F=3/2 hyperfine component of Pb-207 and, second, direct absorption of the first transition process light by Pb-207.

REFERENCES:
patent: 4734177 (1988-03-01), Robinson et al.
patent: 5088820 (1992-02-01), Winefordner et al.
patent: 5110562 (1992-05-01), Sasao et al.

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