Abstract
Fluorescence (phosphorescence) excitation spectra as well as luminescence spectra and decay times were investigated for NO in N2 and mixed N2/Kr matrices. All Rydberg states rapidly relax to the ground state in mixed matrices with the N2 molar fraction exceeding xN2=0.35. This dependence on the N2 concentration is attributed to the complete fluorescence quenching of all NO molecules with at least one N2 nearest neighbor. The vibrational levels of the B 2Π valence states strongly coupled to the Rydberg state are also depopulated. The general picture of relaxation channels is discussed.
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