Nuclear spin conversion in CH3F induced by an alternating electric field J. Cosléou, F. Herlemont, M. Khelkhal, J. Legrand and P. L. Chapovsky Eur. Phys. J. D, 10 1 (2000) 99-104 Published online: 15 April 2000 DOI: 10.1007/s100530050529