Temperature-dependent studies of the reaction of W(a 5DJ, a 7S3) with O2
Abstract
The gas-phase reactivities of W(a 5DJ, a 7S3) with O2 in the temperature range 298–573 K are reported. Tungsten atoms were produced by the photodissociation of W(CO)6 and detected by laser-induced fluorescence. The disappearance rate constant of the s1d5 a 7S3 state is of the order of the gas kinetic rate constant. The removal rate constants for the s2d4 a 5DJ states are J dependent. The a 5DJ states are not as reactive as the s1d5 a 7S3 state and are found to be temperature dependent. The disappearance rates of all states in the presence of O2 are found to be pressure independent with buffer gas. Physical quenching rate constants for the excited states in the presence of Ar, He, N2 and SF6 are also reported. Results are discussed in terms of the different electron configurations of the states.
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