Reaction dynamics of V(a F-4(J))+NO - VO(X (4)Sigma(-))+N studied by a crossed-beam laser-induced fluorescence technique - art. no. 204316

摘要

The dynamics of the reaction, V(a F-4(J))+NO -> VO(X (4)Sigma(-))+N was studied by using a crossed-beam technique at 16.4 kJ/mol of collision energy. The V atomic beam was generated by laser vaporization and crossed with the O-2 beam at a right angle. The laser-induced fluorescence (LIF) for the transition of VO(B (4)Pi-X (4)Sigma) was used to determine the rotational state distribution of the reaction product in the vibrational ground state. Almost pure V(a F-4(J)) beam was obtained by using the mixture of NH3 with N-2 as a carrier gas. Comparing the LIF spectra of VO measured for two carrier gases, i.e., NH3/N-2 and pure N-2, it was concluded that the vibrational ground state of VO(X (4)Sigma(-)) is formed almost entirely from the reaction of V(a F-4(J)) and the contribution of the metastable V(a D-6(J)) is negligible. The observed rotational distribution was similar to a statistical prior prediction, and suggested that the title reaction proceeds via a long-lived intermediate, which is consistent with an electron transfer mechanism. (c) 2006 American Institute of Physics.