Accession Number : AD0782245

Title :   Electronic Properties and the Thermal and Photo Decomposition of Potassium Azide.

Descriptive Note : Technical rept.,

Corporate Author : PRINCETON UNIV N J SOLID STATE AND MATERIALS LAB

Personal Author(s) : DE Panafieu,Arnaud

Report Date : JAN 1974

Pagination or Media Count : 164

Abstract : The role of charge carriers (electrons, holes, ions) in the thermal and photo decomposition of potassium azide is studied experimentally. The experiments are conducted in an ultra-high vacuum system where very small decomposition rates can be measured and where contamination of the sample surface is negligible. The thermal decomposition of KN3 is found to be temperature activated with activation energies which compare well to the activation energies for ionic conductivity. The thermal decomposition of KN3 involves a surface reaction consecutive to the arrival of ions, by diffusion, at the sample surface. One mechanism leading to the photo decomposition of KN3 is found to result from the arrival of holes at the surface of the material, decomposition being enhanced when more holes drift to the surface. A model for photolysis is presented in which an electron is first excited and then transferred to a potassium colloid. (Modified author abstract)

Descriptors :   *Azides, *Pyrolysis, *Photolysis, *Charge carriers, Surface reactions, Excitons, Activation energy, Temperature, Ions, Charge transfer, Mobility, Reaction kinetics, Interfaces, Molecular energy levels, Transport properties, Photoelectric emission, Excitation, Crystals, Theses

Subject Categories : Inorganic Chemistry
      Radiation and Nuclear Chemistry
      Atomic and Molecular Physics and Spectroscopy
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE