Enrichment of nuclear spin isomers by molecular coherent control
نویسنده
چکیده
Nuclear spin isomers were discovered in the late 1920s when ortho and para H2 were separated by deep cooling of hydrogen gas. This technique was successful because of extremely large gap between the ortho and para states in H2. Investigations of heavier isomers were not possible to perform until recently because of the lack of appropriate enrichment methods. First separation of heavy molecules (CH3F) was achieved using the Light-Induce Drift effect. Later, the isomers of H2O, 3) H2CO, 4) Li2, 5) and C2H4 6) were enriched. A few practical applications of spin isomer are already known. For example, isomers can affect chemical reactions, 8) can significantly enhance NMR signals, 10) or can be used as spin labels in NMR based techniques.
منابع مشابه
Coherent control of enrichment and conversion of molecular spin isomers
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