Influence of humidity on photochemical ozone generation with 172 nm xenon excimer lamps M. J. Salvermoser, U. Kogelschatz and D. E. Murnick Eur. Phys. J. Appl. Phys., 47 2 (2009) 22812 Published online: 17 April 2009 DOI: 10.1051/epjap/2009063