Abstract
The 18O-selective IR MPD of perfluorodimethyl ether (CF3)2O has been studied. The dissociation yields of (CF3)2 18O (β18) and (CF3)2 16O (β16) and the isotope selectivity α(18/16) have been measured as functions of TEA CO2-laser frequency, laser fluence and ether parent pressure. The (CF3)2O molecule has been found to provide highly efficient 18O separation. The MPD yield of the desired isotope 18O varies in the range 3–13%; the selectivity α(18/16) achieves a value of 95 at the laser line 10P22, at moderate fluence Ø=4 J/cm2 and at P (CF 3)2 O=0.5 Torr.
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