https://doi.org/10.1007/s100530050529
Nuclear spin conversion in CH3F induced by an alternating electric field
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, France
Corresponding author: a chapovsk@lsh.univ-lille1.fr
Received:
23
July
1999
Revised:
7
September
1999
Published online: 15 April 2000
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
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
