Abstract
ABSTRACT The dependence of vibrational distributions (VDs) of N2(C, ν) state on argon fraction and filling pressure was investigated in terms of integrated band intensities of second positive system (C, ν′ → B, ν″) of N2. The vibrational temperature was determined from slope of the Boltzmann fit of these VDs and found to be strongly dependent on argon fraction in the discharge. The spectroscopic results suggested that collisional transfer of energy from Ar (3P2,0) metastable atoms to N2(X, ν) ground state is the main excitation pathway for population of N2(C, ν) state.
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