title: Measurement of quenching cross sections for laser-induced fluorescence of atomic arsenic.
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.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.forename: Y
authors.initials: Y
authors.lastname: Yoon
authors.forename: P B
authors.initials: PB
authors.lastname: Kelly
authors.forename: I M
authors.initials: IM
authors.lastname: Kennedy