The discovery of an orange flame is reported that appears also at higher pressures of active nitrogen and oxygen without the presence of a metal catalyst unlike previous research in over 30 years. Enhancement of emissions of the first positive band system of nitrogen was observed from various vibrational levels of the N2(B 3Πg) state. Arguments to identify the species responsible and implications to previous research of this phenomenon of homogeneous excitation and collisional intersystem crossing into N2(B 3Πg) induced by excited O2 are presented. Its probing for lasing is suggested.

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