Radiative lifetimes of OH(A 2Σ) and Einstein coefficients for the A-X system of OH and OD

Abstract

Radiative lifetimes of individual rotational states of OH( A 2Σ) were observed using a delayed coincidence technique. The values obtained were scaled to a theoretical functional form to give τ rad( A 2Σ, v = 0, N = 1, J = 3 2 = 686 ± 14 ns. Einstein A and B coefficients for the A- X system of OH and OD were computed, using numerical integrals of a transition moment of the form Re( r) = 3.75 × 10 -30 (1-0.75 r) C … m and vibrational wavefunctions obtained from numerical solutions of the radial Schrödinger equations (including centrifugal terms) for RKR potentials for the two electronic states. Matrix elements in Hund's case b were transformed to intermediate coupling for the X state to yield proper oscillator strengths for computation of the Einstein coefficients. Tables of the A and B coefficients for the 0-0 vibrational transitions are included. Extended tables are available on microfiche or microfilm from the authors.