Origin of the Green Bands in the Boron‐Oxygen System

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Abstract
A study has been made of the effect of oxygen on the intensity of absorption in the green or ``fluctuation'' bands by the gas phase in equilibrium with B2O3(l). The reaction which forms the substance responsible for the bands from B2O3(l) in the presence of oxygen was found to be 70 kcal/mole endothermic, in the range 1660–1950°K, in agreement with other work. At constant temperature the absorptivity was found to depend on the ¼ power of the oxygen pressure. This is interpreted as evidence that the absorbing species is BO2. The oscillator strength of the transition is estimated as 0.003.
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