Accession Number : AD0683733

Title :   KINETICS OF THE PHOTOCHEMICAL DECOMPOSITION OF OZONE IN 3130 A ULTRAVIOLET LIGHT.

Descriptive Note : Final technical rept. 1 Aug 65-1 Oct 68,

Corporate Author : INSTITUTO SUPERIOR DE INVESTIGACIONES BUENOS AIRES (ARGENTINA) FACULTAD DE QUIMICA Y FARMACIA

Personal Author(s) : Castellano,E. ; Schumacher,H. J.

Report Date : FEB 1969

Pagination or Media Count : 37

Abstract : To better define its stability, the following selected routes of ozone decomposition were investigated: (a) the photochemical decomposition of ozone by the use of an Hg-line 3130A light source; (b) the behavior of O ('D) atoms as species possibly capable of initiating ozone decomposition; and (c) the kinetics of the O ('D) + O3 to 2 O2 reaction in the presence of oxygen and inert gases. Results demonstrate that the maximum quantum efficiency is 6 for pure ozone and not influenced by pressure, temperature and light intensity. Addition of foreign gases decreases the quantum efficiency to a limiting value of 4 in an oxygen-free system. Water vapor increases the reaction rate very markedly. A mechanism for the photodecomposition of O3 is presented and shown to be consistent with the data selected. (Author)

Descriptors :   (*OZONE, *PHOTOLYSIS), DECOMPOSITION, REACTION KINETICS, ULTRAVIOLET RADIATION, MOLECULAR ENERGY LEVELS, ARGENTINA

Subject Categories : Atmospheric Physics
      Radiation and Nuclear Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE