Collision-free lifetimes and quenching of the A 2Σ+ state of HS and DS radicals

Abstract
The collision‐free lifetime of the v=0 level of the A 2Σ+ state of DS has been measured to be 189 ns, and that of HS has been estimated to be ∼0.5 to 2 ns. Absolute quenching rate constants of DS ( A state) by various gases have also been determined.