Measured Oscillator Strengths for the Allowed2p−3sTransitions from the Ground State in Oxygen and Nitrogen

Abstract

Oscillator strengths for the $2p^4{}_{}{}^3{}_{}{}^{}P_{2,1,0}^{}{}_{}{}^{}-3s{}_{}{}^3{}_{}{}^{}S_1^{}{}_{}{}^{}$ transitions in oxygen and the $2p^3{}_{}{}^4{}_{}{}^{}S_{\frac{3}{2}}^{}{}_{}{}^{}-3s{}_{}{}^4{}_{}{}^{}P_{\frac{5}{2},\frac{3}{2},\frac{1}{2}}^{}{}_{}{}^{}$ transitions in nitrogen were obtained from measurements of the absorption of resonance radiation by O and N atoms in their ground states. The N atoms were produced in a flowing nitrogen afterglow; calibrated titration of this afterglow with NO was used to produce O atoms and to measure concentrations of both N and O. The measured oscillator strengths for the individual multiplet transitions are in the expected ratios and the values of $\Sigma \mathrm{gf}$ are 0.30±0.08 and 0.39±0.12 for the Oi and Ni transitions, respectively; these are both in good agreement with recent calculations.