Kinetics of the Photolysis of Sodium Azide
1961; American Institute of Physics; Volume: 35; Issue: 5 Linguagem: Inglês
10.1063/1.1732150
ISSN1520-9032
Autores Tópico(s)Machine Learning in Materials Science
ResumoThe evolution of N2 from solid NaN3 during photolysis is shown to result from active sites located as deep as a few hundred lattice constants within the crystallites. These active sites diffuse to the free surface to produce N2, exhibiting a diffusion constant ∼10—15 cm2/sec. The absorption constant of NaN3 for 2537-A radiation is measured to be about 1.8×105/cm, and quantum efficiencies for photolysis are determined to be 0.040 for photolysis of the surface layer and 0.12 for equilibrium nitrogen evolution from a partially decomposed mass. The reaction is shown to be first order with respect to light intensity. A mechanism for photolysis is suggested based upon Thomas and Tompkins' exciton decomposition scheme.
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