Abstract
The excitation of electronic states of sodium by vibrationally excited nitrogen N2‡ has been demonstrated experimentally. The N2‡ was produced in the afterglow of a microwave discharge in flowing N2. Identification of N2‡ as the source of the sodium excitation was accomplished by the selective removal of N2‡ from the afterglow by deactivation with N2O and by observation of the concurrent disappearance of sodium line emission. It is concluded that the observed excitation is representative of a general phenomenon whereby the electronic states of atoms can be excited by the transfer of vibrational energy from diatomic molecules. The results verify the generally assumed mechanism for the quenching of sodium resonance radiation by nitrogen.
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