Accession Number : AD0288573

Title :   PHOTOCHEMICAL REACTIONS IN THE ALKALI HALIDES

Corporate Author : IMPERIAL COLL OF SCIENCE AND TECHNOLOGY LONDON (ENGLAND)

Personal Author(s) : JACOBS,P.W.M. ; BEN-DOR,LINA

Report Date : OCT 1962

Pagination or Media Count : 1

Abstract : The rates of gas evolution from KCl in the form of fine crystals, ground powder and single crystals of varying purity were measured and the quantum yields evaluated. Comparative experiments using AgCl showed that the gaseous products from two substances are identical but that,ALTHOUGH CONTAINING Cl, they consist largely of H. A mechanism involving the exchange of Cl with H in the OH - groups of the hydrated silica forming the interior surface of the glass walls is proposed to account for this. Measurements of the rates of gas evolution with and without a water filter confirmed that a substantial amount of the reaction is caused by the 2537 Angstroms Hg resonance line. Possible mechanisms for the photolysi are discussed. (Author)

Descriptors :   *ALKALI METALS, *CHLORIDES, *HALIDES, *POTASSIUM COMPOUNDS, *SILVER COMPOUNDS, CHEMICAL REACTIONS, CHLORINE, CRYSTALS, DECOMPOSITION, GASES, HYDROGEN, HYDROXIDES, MERCURY, OXIDES, PHOTOCHEMICAL REACTIONS, SILICON COMPOUNDS, SINGLE CRYSTALS, THEORY

Distribution Statement : APPROVED FOR PUBLIC RELEASE