Reactions of germanium vapor with oxidizers: Photon yields and a new GeO band system

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Abstract
Germanium was reacted with N2O, O2, NO2, and NO in a flow system, which produced GeO. Chemiluminescence was observed from three electronic band systems of GeO: A 1Π→X 1Σ+ in the uv, a 3Σ+→X 1Σ+ in the blue, and b 3Π1→X 1Σ+ (a previously unreported system) in the near uv. Vibrational constants and Te values have been obtained for the a 3Σ+ and b 3Π1 states, and evidence is presented for a perturbation between the b 3Π (v=8) and A 1Π (v=0) states. Photon yields for each of the three GeO band systems were measured to be small (2 produced GeF (A 2Σ+→X 2Π) chemiluminescence with a measured photon yield of 6.8×10−4; the flames from Ge+Br2 and Ge+Cl2 were too weak to measure.