No abstract

No abstract

Articles you may be interested inA molecular dynamics study of ion bombardment induced ejection of C2H4 from Ni (111): Relationships of the angle distributions of the translational and rotational angular momentum of ejected C2H4 to surface structure J. Chem. Phys. 93, 6041 (1990); 10.1063/1.459491 Crossed molecular beam study of the reaction O(3 P)+C2H4 J. Chem. Phys. 91, 6926 (1989); 10.1063/1.457309 Herzberg band fluorescence from UV excitation of O2 adsorbed on aerosol surfaces J. Chem. Phys. 84, 4673 (1986); 10.1063/1.449994 Flash photolysis resonance fluorescence study of the addition of O(3 P) atoms to C2H4 and C2D4 at 298°KThe fluorescence spectra produced from ArF laser (193 nm) excitation of O 2 and C 2 H 4 either in the gas phase or adsorbed on aerosol surfaces were observed. The aerosols were produced from the reaction of 0 3 + C 2 H 4 or 0 3 + C 2 H 4 + S02 in O 2 in a high pressure flow tube. The fluorescence spectra of the adsorbed molecules were identified from their gas phase spectra. It was observed that the aerosol surface greatly enhanced the molecular fluorescence cross section.

The fluorescence spectra produced from KrF laser (248.5 nm) excitation of O2 adsorbed on aerosol surfaces were observed. The aerosols were produced from the reaction of O3+C2H4 or O3+C2H4+SO2 in O2 or N2 in a gas-flow reactor. The fluorescence spectra were identified as the O2 (A 3∑+u, A′ 3Δu, and c 1∑−u→X 3∑−g) Herzberg systems. The molecular fluorescence intensity was greatly enhanced by the aerosol surface. The possible mechanisms for the enhancement of the observed fluorescence by surface are discussed.