Abstract
The dependence of the chemiluminescence channels on incident spin-orbit state has been determined by utilizing optical pumping state selection for the reactions of metastable Ba(6s5d 3DJ) with Cl2, Br2, CCl4, N2O, and NO2. The cross sections for the neighboring metastable 1D level were related to those for the 3DJ multiplet by optical pumping on an intercombination line. For the halogen-containing reagents, the spin-orbit dependence of the reactivity was substantial for BaX B–X emission and was in the order J=3>J=2>J=1. The differences in reactivity were somewhat less for the C–X chemiluminescence channel in the Cl2 and Br2 reactions. Essentially no spin-orbit dependence was observed in the N2O and NO2 reactions.
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