Optical Extinction and N2 Gas Evolution on Photodecomposition of Pb(N3) 2
Abstract
The slow decomposition of lead azide single crystals was studied by measurement of changes in optical extinction and N2 gas evolution due to visible, ultraviolet, and x-ray irradiation. Direct comparisons of total N2 evolved and changes in optical density as a function of irradiation time for a given sample allow a simple interpretation of the decomposition processes in terms of simultaneous colloidal lead and N2 formation. Kinetic studies, as a function of wavelength and intensity, further indicate that the rate of decomposition is simply related to the rate of energy absorption and the amount of decomposition . For weakly absorbed radiation, a monomolecular decomposition process is indicated. The colloidal Pb was found to be, in some cases, highly reactive with air and evidence for Pb metal production was found for irradiation in high vacuum. Evidence for N2 trapping was also observed. Decomposition efficiencies were studied as a function of wavelength and temperature; the thermal stability of the disorder was investigated; and optical bleaching effects were observed. Polarized light measurements of the optical extinction indicate that it is primarily due to absorption by Pb colloids. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1979
- Accession Number
- ADA077110
Entities
People
- Donald A. Wiegand
- Wayne Garrett
Organizations
- United States Army Armament Research, Development and Engineering Center