Abstract
The effect of the initial temperature of the sample on the efficiency of laser initiation and on the duration of the preexplosion stage (induction period) of PETN is studied. An analysis of the results leads to the conclusion that, in the initiation of PETN with the first harmonic of a neodymium laser (1060 nm), a new selective resonant mode of photoinitiation is realized, through the formation of active radicals providing the development of a chain reaction of explosive decomposition at the preexplosion (solid-phase) stage of the process. For this mode, the threshold volume density of energy absorbed is much lower than that typical of the traditional non-selective mechanisms of initiation. The mode of resonant photoinitiation is, however, difficult to realize because of a low value of the absorption coefficient in the actual band. This difficulty can be easily overcome by introducing light-scattering additives, a modification that opens prospects for practical use of resonant photoinitiation.
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Original Russian Text © E.D. Aluker, N.L. Aluker, A.G. Krechetov, A.Yu. Mitrofanov, D.R. Nurmukhametov, V.N. Shvaiko, 2011, published in Khimicheskaya Fizika, 2011, Vol. 30, No. 1, pp. 48–55.
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Aluker, E.D., Aluker, N.L., Krechetov, A.G. et al. Laser initiation of PETN in the mode of resonance photoinitiation. Russ. J. Phys. Chem. B 5, 67–74 (2011). https://doi.org/10.1134/S1990793111010027
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DOI: https://doi.org/10.1134/S1990793111010027