Photochemical Conversion of F Centers to M Centers in KCl, KBr, and CsBr

Date
1968-10-01
Authors
Brothers, A. D.
Lynch, David
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Research Projects
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Physics and Astronomy
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Abstract

The mechanism for the formation of M centers from F centers upon irradiation in the F band is discussed. The evidence favoring F2+ (or M+) centers as intermediate states is shown to be less convincing than formerly believed. Measurements of the activation energy of the reaction rate have been made for F-to-M photoconversion in additively colored KCl (0.35 eV), KBr (0.39 eV), and CsBr (∼0.1 eV). The "activation volumes" for F-to-M conversion in KCl and CsBr have been measured. They are much smaller than those estimated for free anion diffusion. The same mechanism for F-to-M conversion seems to obtain in these three salts.

Description

This article is from Physical Review 174 (1968): 958, doi:10.1103/PhysRev.174.958. Posted with permission.

Keywords
salts, free anion diffusion, Ames Laboratory
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