Collisionhyphen;induced emission from S(1S) by He, Ar, N2, H2, Kr, and Xe

摘要

Collisionhyphen;induced emission from S(1S) has been studied for collisions with He, Ar, N2, H2, Kr, and Xe. The S(1S) was made by OCS photodissociation at 1610 Aring;. The emitted intensity increased linearly with the added gas pressure. This behavior can be described by rate coefficients for induced emission on the1Srarr;1Dtransition of (5.6plusmn;0.9) times;10minus;20cm3moleculeminus;1sdot;secminus;1for helium, (4.2plusmn;0.3) times;10minus;18for argon, (3.3plusmn;0.2) times;10minus;18for nitrogen, (1.73plusmn;0.15) times;10minus;18for hydrogen, (1.5plusmn;0.1) times;10minus;17for krypton, and (1.1plusmn;0.05) times;10minus;16for xenon. Xenon was also found to enhance the1Srarr;3Pemission intensity with a rate coefficient of (5.5plusmn;1.0) times;10minus;19cm3moleculeminus;1sdot;secminus;1. Induced emission is a major (and possibly exclusive) path for deactivation of S(1S) by all these gases except hydrogen.