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- Molecular_laser_isotope_separation abstract "Molecular laser isotope separation (MLIS) is a method of isotope separation, where specially tuned lasers are used to separate isotopes of uranium using selective ionization of hyperfine transitions of uranium hexafluoride molecules. It is similar to AVLIS. Its main advantage over AVLIS is low energy consumption and use of uranium hexafluoride instead of vaporized uranium.MLIS was conceived in 1971 at the Los Alamos National Laboratory.MLIS operates in cascade setup, like the gaseous diffusion process. Instead of vaporized uranium as in AVLIS the working medium of the MLIS is uranium hexafluoride which requires a much lower temperature to vaporize. The UF6 gas is mixed with a suitable carrier gas (a noble gas including some hydrogen) which allows the molecules to remain in the gaseous phase after being cooled by expansion through a supersonic Laval nozzle. A scavenger gas (e.g. methane) is also included in the mixture to bind with the fluorine atoms after they are dissociated from the UF6 and inhibit their recombination with the enriched UF5 product. In the first stage the expanded and cooled stream of UF6 is irradiated with an infrared laser operating at the wavelength of 16 µm. The mix is then irradiated with another laser, either infrared or ultraviolet, whose photons are selectively absorbed by the excited 235UF6, causing its photolysis to 235UF5 and fluorine. The resultant enriched UF5 forms a solid which is then separated from the gas by filtration or a cyclone separator. The precipitated UF5 is relatively enriched with 235UF5 and after conversion back to UF6 it is fed to the next stage of the cascade to be further enriched. The laser for the excitation is usually a carbon dioxide laser with output wavelength shifted from 10.6 µm to 16 µm; the photolysis laser may be a XeCl excimer laser operating at 308 nm, however infrared lasers are mostly used in existing implementations.The process is considerably complex in that many mixed complexes of UFx are formed contaminating the product, with many technical difficulties. United States, France, United Kingdom, Germany and South Africa reported termination of their MLIS programs, however Japan has a small scale program in operation.The Commonwealth Scientific and Industrial Research Organisation in Australia has developed the SILEX pulsed laser separation process. GE, Cameco and Hitachi are currently involved in developing it for commercial use. Silex information".
- Molecular_laser_isotope_separation wikiPageExternalLink lascience04.shtml.
- Molecular_laser_isotope_separation wikiPageExternalLink getfile?04-01.pdf.
- Molecular_laser_isotope_separation wikiPageExternalLink u-laser.htm.
- Molecular_laser_isotope_separation wikiPageExternalLink 21laser.html.
- Molecular_laser_isotope_separation wikiPageExternalLink AGM%20Presentation%20(ASX)%2024%20Nov%2009.pdf.
- Molecular_laser_isotope_separation wikiPageID "3098397".
- Molecular_laser_isotope_separation wikiPageRevisionID "594088028".
- Molecular_laser_isotope_separation hasPhotoCollection Molecular_laser_isotope_separation.
- Molecular_laser_isotope_separation subject Category:Chemical_processes.
- Molecular_laser_isotope_separation subject Category:Isotope_separation.
- Molecular_laser_isotope_separation subject Category:Uranium.
- Molecular_laser_isotope_separation type ChemicalProcess113446390.
- Molecular_laser_isotope_separation type ChemicalProcesses.
- Molecular_laser_isotope_separation type NaturalProcess113518963.
- Molecular_laser_isotope_separation type PhysicalEntity100001930.
- Molecular_laser_isotope_separation type Process100029677.
- Molecular_laser_isotope_separation comment "Molecular laser isotope separation (MLIS) is a method of isotope separation, where specially tuned lasers are used to separate isotopes of uranium using selective ionization of hyperfine transitions of uranium hexafluoride molecules. It is similar to AVLIS.".
- Molecular_laser_isotope_separation label "MLIS".
- Molecular_laser_isotope_separation label "Molecular laser isotope separation".
- Molecular_laser_isotope_separation sameAs MLIS.
- Molecular_laser_isotope_separation sameAs m.08r8_y.
- Molecular_laser_isotope_separation sameAs Q249979.
- Molecular_laser_isotope_separation sameAs Q249979.
- Molecular_laser_isotope_separation sameAs Molecular_laser_isotope_separation.
- Molecular_laser_isotope_separation wasDerivedFrom Molecular_laser_isotope_separation?oldid=594088028.
- Molecular_laser_isotope_separation isPrimaryTopicOf Molecular_laser_isotope_separation.