Abstract
Emission from electronically excited ZnH molecules in the A 2Π 3/2,1/2 states could be observed when ground-state Zn was excited to the 4 3P 1 state in the presence of a small amount of H 2. Temporal profiles of the emission from Zn(4 3P 1) and ZnH (A 2Π 3/2,1/2) after pulsed excitations were measured. The temporal profiles were consistent with a reaction mechanism in which excited ZnH molecules are formed in the electronic energy transfer between Zn(4 3P J ) and ZnH(X 2Σ +). The ground-state ZnH molecules are the product of the Zn(4 3P J ) + H 2 reaction. Similar results were also obtained in the Zn(4 3P J )/D 2 system. The population-weighted averages of the cross sections for the quenching of Zn(4 3P J ) by H 2 and D 2 were determined to be 28×10 −16 and 20×10 −16 cm 2, respectively.
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