Abstract

Absolute emission cross sections have been determined for electron impact on CO, NO and N 2. For the CO(A 1ΠX 1Σ +) and N 2(a 1ΠX 1Σ g) radiation our data is in good agreement with that of other groups. For CO + (B 2Σ +X 2Σ +) the values of the emission cross sections are different from those measured previously. This discrepancy is explained in terms of an inadequate straylight correction in the former experiments. For the NO(A 2Σ +X 2Π) emission no previous σ em values are known to the authors. Furthermore the electronic transition moments of the NO(A 2Σ +X 2Π) and CO +(B 2ΣX 2Σ +) systems have been measured and are found to be independent of the internuclear distance.

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