Lead Azide by Pulsed Electrons

Table XVn. Initiation of Lead Azide by Pulsed Electrons [107]...

L. Avrami, F. G. Borgardt, C. F. Kooi, J. F. Riley, Initiation of Lead Azide by Pulsed Electron Beam, Proceedings of International Conference on Research in Primary Explosives, March 17-19, 1975, eds. J. M. Jenkins, J. R. White, Vol. 1-3, Proc. Exec, Ministry of Defence, Expl. Res. and Dev. Est., Waltham Abbey, Essex, England (AD B013628-30). 

Shock initiation of lead azide by an electron beam has been compared with that of potassium dinitrobenzofuroxan (KDNBF), lead styphnate, and lead mononitroresorcinate (LMNR) [49], An aluminum slab was heated rapidly by electron deposition, generating a pressure pulse that propagated through the slab and was transmitted to a specimen bonded to its rear. The mean energy of the electrons was in the range of 900 keV and produced a stress pulse in the aluminum with a duration of approximately 0.2 psec. 

In peptides and proteins, oxidation of tryptophan is followed by tryptophanyl radical reduction by tyrosine, leading to tyrosinyl radical. This reaction was shown first by Prutz and co-workers (120). Azide radicals are very convenient for this study. This process is easily visualized by pulse radiolysis since both free radicals absorb at different wavelengths (table 3) and the time scale for this reaction goes to microsecond for small peptides to millisecond for proteins. This reaction may occur by intramolecular step and thus it constitutes an excellent model to investigate long range intramolecular electron transfer. These results will be discussed further (see 5.1). 

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