Abstract
With CO2 laser pulses, SF6 in Kr matrix on a ca. 50K Ge substrate is irradiated at a rate of 1 pulse/2 min, and the released gas is analysed with a quadrupole mass spectrometer. The amounts of 32SF6 and 34SF6 in the released gas decrease rapidly with laser shots, and the semilogarithmic plots of these amounts lie on straight lines for the first several shots. The rate constant on releasing 32SF6 (k32) is smaller than that on.34SF6 (k 34).when 32SF6 v3 vibration is excited with 10-μmP (30) pulses, whereas k32 islarger than k34, when 34SF6 v3 is excited with 10-μm P (48) pulses. These experimentalresults likely lead us to a conclusion that laser-spattering for the nonexcited isotopeis ready to be released when one isotope in a matrix is excited with infrared laserpulses.
