Influence of nitrogen oxides NO and NO 2 additives on singlet oxygen production in pulsed electron-beam sustained discharge

A A Ionin,I V Kochetov,N P Vagin,A P Napartovich,N N Yuryshev,Yu M Klimachev,A A Kotkov,D V Sinitsyn,A Yu Kozlov,L V Seleznev,O A Rulev,Claude R Phipps

doi:10.1117/12.782481

Abstract

Influence of nitrogen oxides NO and NO2 on specific input energy (SIE) and time behavior of singlet delta oxygen (SDO) luminescence excited by pulsed e-beam sustained discharge in oxygen was experimentally and theoretically studied. NO and NO2 addition into oxygen results in small increase and decrease of SIE, respectively, the latter being connected with large energy of electron affinity to NO2. The addition of 0.1-0.3% nitrogen oxides was experimentally and theoretically demonstrated to result in notable enhancement of SDO lifetime, which is related to a decrease of atomic oxygen concentration in afterglow. There was experimentally demonstrated that for getting high SDO concentration at gas pressure 30-60 Torr for the time interval less than ~0.5 s one needs to add not less than 0.2% nitrogen oxides into oxygen. Temperature dependence of relaxation constant for SDO quenching by unexcited oxygen was estimated by using experimental data on time behavior of SDO luminescence.

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