KINETIC-STUDY OF THE REACTION OF FE(A-D-5(J)) WITH N2O FROM 398-K TO 620-K

The gas phase reactivity of Fe(a(5)D(J)) with N2O in the temperature r ange 398-620 K is reported. Iron atoms were produced by the photodisso ciation of ferrocene and detected by laser-induced fluorescence. The r eaction rates of the a D-5(J) states are very slow and temperature dep endent. The bimolecular rate constant is described in Arrhenius form b y (1.41 +/- 0.29) x 10(-10) exp(-44.4 +/- 1.0 kJ/mol/RT) cm(3) s(-1) w here the uncertainties are +/- 2 sigma. The disappearance rates in the presence of N2O are independent of buffer gas identity (Ar or N-2) an d total pressure. The removal rate constants for the a 5D(J) states ar e independent of J.