Abstract
Emission from a wide range of vibrational levels (27 ⩾ ν′ ⩾ O) of the 3Π(0 + g) state of Br 2 has been observed during the interaction of singlet oxygen ( 1Δ g, 1Σ + g) with dissociated bromine at 300°K. The mechanism involves excitation by singlet O 2 either of: (I) a ground state 2P 3 2 to an excited state 2P 1 2 Br atom, followed by recombination, Br 2P 3 2 + Br 2P 1 2 + M → Br 2 B 3Π(0 + u) + M: or (II), a 3Π(1 u) excited Br 2 molecule (formed by recombination of Br 2P sol3 2 + Br 2P 3 2 + M according to the bromine afterglow reaction mechanism). Br 2 3Π(1 u) + O 2 ( 1Δ g, 1Σ + g) → Br 2 B 3Π(0 + u + O 2 X 3Σ − g.
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