THE EFFECT OF ELECTRIC AND MAGNETIC FIELDS ON THE 7F0↔5D0 TRANSITION OF BaClF : Sm2+ USING PHOTON-GATED HOLEBURNING R.M. Macfarlane, R.M. Shelby and A. Winnacker J. Phys. Colloques, 46 C7 (1985) C7-537-C7-542 DOI: 10.1051/jphyscol:1985796