Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1983-09-15
1987-09-01
Terapane, John F.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
20415722, B01D 5934
Patent
active
046907424
ABSTRACT:
A method and apparatus for laser isotope separation of atoms or molecules. The method for laser isotope separation comprises the irradiation of an atom or molecule to produce an adiabatic population inversion, terminating the radiation sufficiently abruptly to trap the atom or molecule in an excited state, and further radiating the atom or molecule for causing transitions out of the previously excited state for dissociating the molecule or for causing a chemical reaction to effect isotopic separation. The method comprises slowly increasing the intensity of the initial radiation from zero to a value sufficiently high to produce an adiabatic population inversion when the frequency is tuned near a single narrow resonance which includes the overlapping multiphoton resonances originating from either the rotational energy levels of the vibrational ground state of the molecule or the different hyperfine levels of the ground state of the atom for providing the adiabatic population inversion. The apparatus for laser isotope separation comprising a first irradiation means that provides a slowly increasing continuum of intensity from zero to a sufficiently high value to produce an adiabatic population inversion when the frequency is tuned near a single narrow resonance associated with the atom or molecule, a second irradiation that produces radiation having an appropriate wave length, an intensity sufficient to cause transitions out of the previously excited state and a smooth, shorter pulse shape than required for the first irradiation means, and a Raman shifting cell, utilized with the first and second irradiation means for shifting the wave length of the radiation as needed.
REFERENCES:
patent: Re30898 (1982-04-01), Cantrell et al.
patent: 4049515 (1977-09-01), Robinson et al.
patent: 4256962 (1981-03-01), Horton et al.
patent: 4288691 (1981-09-01), Horton
patent: 4302805 (1981-11-01), Marez et al.
patent: 4334883 (1982-06-01), Robinson et al.
Peterson et al. "Adiabatic Excitation of Multilevel Band Systems", Optics Communications, vol. 43, No. 2, pp. 123-127, Sep. 1982.
Cantrell et al. "Two-Photon Excitation of SF.sub.6 " Chemical Physics Letters, vol. 93, No. 2, pp. 267-272, Dec. 1982.
Steel et al. "Two-Photon Coherent-Transient Measurement of the Nonradiative Collisionless Dephasing Rate of SF.sub.6 Via Doppler-Free Degenerate Four-Wave Mixing", Physical Review Letters, vol. 43, No. 21, pp. 1588-1591, Nov. 1982.
Flushberg et al. "Probing Adiabatic States", Physical Review A, vol. 14, No. 2, pp. 813-815, Aug. 1976.
Grischkowsky "Gocherent Excitation, Incoherent Excitation and Adiabatic States", Physical Review A, vol. 14, No. 2, pp. 802-812, Aug. 1976.
Grischkowsky et al. "Adiabatic Following Model for Two-Photon Transitions: Nonlinear Mixing and Pulse Propagation", Physical Review A, vol. 12, No. 6, pp. 2514-2533, Dec. 1975.
Grischkowsky et al. "Self-Induced Adiabatic Rapid Passage", Physical Review, A, vol. 12, No. 3, pp. 1117-1120, Sep. 1975.
Cantrell, III C. D.
Peterson G. L.
Board of Regents , The University of Texas System
Caress Virginia B.
Terapane John F.
LandOfFree
Method and apparatus for laser isotope separation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for laser isotope separation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for laser isotope separation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1263723