Diffusion Coefficient and Reaction Rate Constant of the SiH3 Radical in Silane Plasma

Abstract
By using infrared diode laser absorption spectroscopy, the rotational temperature and the number density of the SiH3(2A1) radical were measured in a pulsed SiH4/H2 discharge. The decay of the absorption intensity was also measured as a function of the filling gas pressure for the line Q(6, 6)(1- ← 0+) of the SiH3 ν2 fundamental band to determine the effective diffusion coefficients (D(SiH3 in H2) and D(SiH3 in SiH4)) and the reaction rate constant (k) of the SiH3 radical.