Filter for isotopic alteration of mercury vapor

Details Filter for isotopic alteration of mercury vapor Filter for isotopic alteration of mercury vapor

1986-12-29

1989-01-24

Fields, Carolyn E.

Radiant energy

Radiation controlling means

250436, 422186, 2041572, 350 15, G01N 2100

Patent

active

048002844

ABSTRACT:
A filter for enriching the .sup.196 Hg content of mercury, including a reactor, a low pressure electric discharge lamp containing a fill of mercury and an inert gas. A filter is arranged concentrically around the lamp. The reactor is arranged around said filter, whereby radiation from said lamp passes through the filter and into said reactor. The lamp, the filter and the reactor are formed of quartz, and are transparent to ultraviolet light. The .sup.196 Hg concentration in the mercury fill is less than that which is present in naturally occurring mercury, that is less than about 0.146 atomic weight percent. Hydrogen is also included in the fill and serves as a quenching gas in the filter, the hydrogen also serving to prevent disposition of a dark coating on the interior of the filter.

REFERENCES:
patent: 3983019 (1976-09-01), Botter
Grossman & Maya, "Photochemical Enrichment of .sup.196 Hg", 13th International Quantum Electronics Conference (Jun. 1984).
McDowell et al., "Photochemical Separation of Mercury Isotopes", Can. J. Chem., vol. 37, 1432 (1959).
Webster & Zare, "Photochemical Isotope Separation of .sup.196 Hg by Reaction with Hydrogen Halides", J. Phys. Chem., vol. 85, 1302 (1981).
Deech et al., "Quenching and Depolarization of Mercury Resonance Radiation", Can. J. Phys., vol. 49, 1978-1981 (1971).
Zemansky, "Absorption and Collision Broadening of the Mercury Resonance Line", Phys. Rev., vol. 36, 219 (1930).

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