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Nuclear spin conversion in CH \(\)F induced by an alternating electric field

  • J. Cosléou
  • F. Herlemont
  • M. Khelkhal
  • J. Legrand
  • P.L. Chapovsky

Abstract:

The nuclear spin conversion in CH3F molecules subjected to an alternating electric field was investigated experimentally. The conversion rate was found to be almost unaffected by low electric fields (\(\) V/cm) but sharply increased tenfold when the electric field amplitude exceeds the values (\(\) V/cm) sufficiently high to produce crossings of the ortho and para states of the molecule. A theoretical model for the molecular conversion in alternating electric field was developed. The results of the experiment were found to be in a good agreement with the theory.

PACS. 31.30.Gs Hyperfine interactions and isotope effects, Jahn-Teller effect - 32.80.Bx Level crossing and optical pumping - 34.30.+h Intramolecular energy transfer; intramolecular dynamics; dynamics of van der Waals molecules 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2000

Authors and Affiliations

  • J. Cosléou
    • 1
  • F. Herlemont
    • 1
  • M. Khelkhal
    • 1
  • J. Legrand
    • 1
  • P.L. Chapovsky
    • 1
  1. 1.Laboratoire de Physique des Lasers, Atomes et Molécules(UMR 8523 du CNRS), CERLA, Centre d'Études et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, FranceFR

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