Abstract
Molecular beam infrared photodissociation spectra of (SF/sub 6/)/sub 2/ and SF/sub 6/Ar have been obtained by using line tunable CO/sub 2/ and N/sub 2/O lasers and bolometric beam detection. By comparing spectra at different dilution and source pressure, the authors show that the (SF/sub 6/)/sub 2/ spectra are inhomogeneously broadened. However, saturation experiments show a signal vs. laser power behavior of pure exponential type. Clearly, more work is needed with continuously tunable lasers or with time-resolved techniques before the authors can claim to know the photodissociation lifetime of this dimer. The angular distribution of the fragments in the photodissociation of (SF/sub 6/)/sub 2/, (SF/sub 6/)/sub 3/, and (C/sub 2/H/sub 4/)/sub 2/ has also been measured with an angular resolution better than 0.8/sup 0/. Only in the case of (SF/sub 6/)/sub 2/ do the authors find that angular distribution has a maximum, this being located at 1.5/sup 0/. The implications of these results for the dynamics of the dissociation process are discussed.
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