Abstract

The measurement of collisional quenching cross sections for the (4p)2 (5s)1 4 P 1/2 state of atomic arsenic is reported. The arsenic 4 P 1/2 state was prepared by excitation from the (4p)3 4 S 3/2 ground state with 197.2-nm laser radiation. The fluorescence signal from the (4p)2 (5s)1 4 P 1/2 → (4p)3 2 D 1/2 transition was monitored at 249.3 nm. Quenching cross sections were obtained for hydrogen, methane, nitrogen, carbon monoxide, and ethylene.

© 1998 Optical Society of America

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