Physics
Scientific paper
Jul 1960
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1960rspsa.256..514d&link_type=abstract
Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Volume 256, Issue 1287, pp. 514-527
Physics
1
Scientific paper
The photochemical decomposition of the ionic thallous azide to metallic thallium and nitrogen has been studied as a function of wavelength, temperature and light intensity. Two values have been obtained for the activation energies; 0.33 eV corresponding to the full output of a mercury lamp, and 0.14 eV for light in the wavelength region 3200 to 3800 A. The quantum efficiency at 3650 Å is 2 x 10-3. Two exciton bands at 3415 and 3348 Å have been observed in thallous azide by the method of low-temperature spectroscopy developed by Nikitine and Gross. Two narrow bands have been resolved in silver azide which is also an ionic azide, in the region previously studied by McLaren & Rogers. These bands occur at 3608 and 3590 Å. The refractive index of thallous azide has been measured by the Brewster angle method, and the electron energy levels have been estimated. The results of the photochemical decomposition of thallous azide have been related to the electron energy levels, and to measurements of photoconductivity made by Evans & Yoffe.
Deb Sudip K.
Yoffe A. D.
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