Precise measurement of hyperfine coupling in (CH3F)-C-13 based on nuclear spin conversion

Authors
Chapovsky, PL Cosleou, J Herlemont, F Khelkhal, M Legrand, J
Citation
Pl. Chapovsky et al., Precise measurement of hyperfine coupling in (CH3F)-C-13 based on nuclear spin conversion, EUR PHY J D, 12(2), 2000, pp. 297-301
Citations number
16
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL D
ISSN journal
14346060 → ACNP
Volume
12
Issue
2
Year of publication
2000
Pages
297 - 301
Database
ISI
SICI code
1434-6060(200011)12:2<297:PMOHCI>2.0.ZU;2-G
Abstract
A new method is proposed for the experimental determination of the hyperfin e coupling in molecules. The method is based on the level-crossing effect i n the spin isomer conversion in alternating electric fields. An experiment performed with the (CH3F)-C-13 molecules has revealed the strength of the o ff-diagonal in K (DeltaK = 2) nuclear spin-spin coupling 69.6 +/- 1 kHz, wh ich is only by 0.4 +/- 1 kHz larger than the theoretical value calculated o n the basis of the molecular structure.