Analysis of decomposition process of BrCN with microwave discharge flow of Ar

作者：Wada Akira^*; Araki Hitoshi; Ito Haruhiko

来源：Journal of Physics D: Applied Physics , 2010, 43(4): 045201.

DOI：10.1088/0022-3727/43/4/045201

CN(X-2 Sigma(+)) radicals were produced from the dissociative excitation reaction of BrCN with the microwave discharge flow of Ar. This plasma reaction was studied by the combined analysis of the laser-induced fluorescence (LIF) and electrostatic-probe measurements. The Ar pressure, P-Ar, was in the range 0.2-0.5 Torr. The absolute densities of CN(X-2 Sigma(+)) radicals, n(CN(X)), and that of the metastable state of Ar atoms, n(M), were determined by observing the CN(A(2)Pi(i)-X-2 Sigma(+)) and Ar(P-3(1)-P-3(2)) transitions, respectively. The temperature, T-e, and the density, n(e), of free electrons were determined from the electrostatic-probe measurement. When a trace amount of H2O vapour was introduced into the reaction system, n(CN(X)), n(M), T-e and n(e) were varied. By comparing the decrements of n(CN(X)), n(M) and n(e) upon the addition of H2O vapour into the reaction system, the production process of CN(X-2 Sigma(+)) was found, predominantly, to be the energy transfer from the metastable state of Ar atoms.

• 出版日期2010-2-3