Abstract
The cross sections for the quenching of the translationally hot and thermalized NH(c 1Π, ν=0) radicals by simple molecules were determined by using a pulsed laser technique. The cross sections for the hot NH(c) radicals were found to be much smaller than those for the thermalized ones. The experimentally obtained cross sections could be correlated with the cross sections for the complex formation calculated on the basis of multipole attractive forces with a repulsive centrifugal barrier. These results suggest that long-range attractive forces are important in the collisional quenching. No rotational level dependence was observed in the quenching of the translationally hot NH(c) radicals.
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