Radiative Lifetime Measuements of Some Excited States of N2+ and CH

Abstract

Time-sampling technique has been applied to radiative lifetime measurements. The time resolution of the apparatus was about 10 nsec. The excited molecules were produced by electron bombardment of N₂ and CH₄. The measured lifetimes of N₂⁺(B²Σ_u⁺), CH(A²Δ) and CH(B²Σ⁻) are (6.5±0.5)×10⁻⁸ sec, (4.3±0.2)×10⁻⁷ sec and (7.6±0.4)×10⁻⁷ sec, respectively. Band oscillator strengths have been computed on the assumption that the electronic transition moment is constant in the range in which the transition takes place.