Abstract

Aerosol particles produced from the ozone and 1,3-butadiene reaction are excited by ultraviolet radiation. Optical emissions from the photoexcited aerosol particles are observed in the 300–800-nm region. The emission intensities are measured at various gas concentrations and reaction times. The aerosol formation mechanisms and the sources responsible for optical emissions are investigated. It is suggested that the small radicals adsorbed on the surfaces of aerosol particles are simultaneously desorbed and excited by UV photons, and the excited radicals subsequently give optical emissions.

© 1983 Optical Society of America

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