Abstract
Infrared multiple-photon dissociation (IRMPD) of MoF6 has been investigated with a parallel beam of a para-H2 Raman laser newly developed by our group. MoF6 gas (2 Torr, natural abundance) was put into in a static cell cooled to −58℃ and was irradiated with the laser line at 728 cm−1. The critical fluence of 0.11 Jcm−2 for complete dissociation was determined by analysis with a Gaussian beam model. Irradiation at the lower frequency side (728 cm−1) of the MoF6 ν3 band enriched the lighter isotopes in the residue. A maximum value for selectivity of 1.1 was obtained.