Abstract
Isotope-selective multiphoton dissociation of CTF3 in the presence of CDF3 by TEA CO2 laser is studied. The highest T/D selectivity of 58 was observed at a sample pressure of 2 Torr in the presence of 20 Torr of argon on excitation by the 9P(24) CO2 laser line. The effect of multiple-frequency irradiation on selectivity is studied in the P and Q branches of the v 2 absorption band of CTF3. No improvement in the selectivity is noticed on going from single- to multiple-frequency irradiation. These results are compared with previous multiple-frequency work on the CTF3/CHF3 system, and explained in terms of strong spectroscopic interference from 13CDF3 in the present case.
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