Electronically induced multiphoton absorption

Details Electronically induced multiphoton absorption Electronically induced multiphoton absorption

1979-11-13

1982-09-21

Kyle, Deborah L.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

204158R, 423 3, B01D 5900

Patent

active

043505775

ABSTRACT:
Electronic excitation of polyatomic molecules followed by nonradiative decay provides states from which efficient multiphoton infrared excitation can be achieved. Initial (electronic) excitation can be molecule-specific or isotope-selective. Subsequent multiphoton excitation has a threshold which can be an order of magnitude or more lower than for multiphoton excitation from the ground state. By this method, laser-induced chemical reactions or isotope separation can be achieved with lower infrared laser fluence and/or higher concentration of polyatomic molecules than with prior art methods.

REFERENCES:
patent: 4233125 (1980-11-01), Schafer
Moore, C. B. "The Application of Lasers to Isotope Separation", Accts. Chem. Res. 6:323-8, 1973.
Ambartzumion, R. V. et al., "Selective Two-Step (STS) Photoionization of Atoms and Photodissociation of Molecules by Laser Radiation", App. Opt., 11 (2): 354-358, Feb. 1972.
Ronn, A. M., "Laser Chemistry", Sci. Am. May 1979, pp. 114-128.
Zare, R. N., "Laser Separation of Isotopes", Sci. Am. 236:86-98, Feb. 1977.

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