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  • 1
    ISSN: 1432-0649
    Keywords: 33
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Energy efficiency has been discussed in the multi-stage laser separation of13C in the ir laser photolysis of CF3I. The comparison has been made between the two methods, i.e., the photolysis of13C molecules (ordinary method) and the photolysis of12C molecules (elimination method). The former recycles the photolyzed product after the regeneration of feed molecules, while the latter recycles the residue after the elimination of the photolyzed product. The analysis of the energy consumption using theoretical models has shown that the elimination method consumes more energy, but the difference is far less than expected; the overall energy consumption may reach the same level at a lower pressure according to our estimation which includes the factors of the quantum efficiency for the dissociation, the energy difference between the laser lines and the material loss for the regeneration. It may imply that the elimination method is more favored in a practical application because it is free from the regeneration procedure.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 41 (1986), S. 43-48 
    ISSN: 1432-0649
    Keywords: 33
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A waveguide reactor for infrared multiphoton dissociation reactions has been presented and applied to laser isotope separation of13C. The reactor is a sealed vessel containing a hollow waveguide for a CO2 laser, and the laser beam is condensed in the waveguide. The waveguide is a pipe of total-reflection glass or metal-coated glass with a funnelled inlet; it is 50 cm long with a 3 mm inner diameter. The isotope separation of13C has been made by multiphoton dissociation of CHF2Cl using a TEA CO2 laser. The result has shown that the waveguide reactor increases the dissociation yield by four to ten times as much as that without the waveguide at the pulse rate of up to 150 Hz, while the separation factor remains on the same level. It is also found that an optical breakdown which is induced at the wall surface plays a significant role to reduce the isotope selectivity.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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