A luminosity is produced over Ni maintained at approximately 20°C in a stream of O atoms. Spectroscopic investigation shows the strongly forbidden b 1Σg+ — X 3Σg— atmospheric system and A 3Σu+ — X 3Σg— Herzberg system of the O2 molecule plus four strong heads of the (0, 0) band of the OH A 2Σ+ — X 2Π interaction. Certain spectral features in the region of the (0, 0) atmospheric band could not be resolved for positive identification but are suggested to be the vibrational-rotational bands of OH. The Herzberg and atmospheric bands appear to be primary products of the surface catalysis while the OH molecule can be either a surface product or the result of chemical reactions of certain excited species present.
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Mannella et al. (1961) studied this question.
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