Photoexcitation of NO molecules by ArF laser

Abstract

In this work, we study the process of laser photolysis of NO2 molecules followed by fluorescence of NO radicals when interacting with broadband radiation from an ArF laser. It was shown that in the presence of nitrogen dioxide in the cuvette with a pressure of 1 mbar, the spectral distribution of fluorescence includes high-intensity spectral bands that correspond to optical transitions NO C2Π (v' = 0) → NO X2Π (v'' = 0-4). When helium with the ratio He / NO2 = 1000/1 mbar was added to the cuvette, intense fluorescence was observed at optical transitions from the electron-vibrational levels of NO C2Π (v' = 0) and A2∑+ (v' = 3) to the ground state X2Π (v'').