Shock Initiation of Lead Azide with an Electron Beam

Shock Initiation of Lead Azide with an Electron Beam 

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. 

The RD1333 lead azide wafers were 1/4 in. (0.63 cm) diam and 0.040 in. (0.10 cm) thick, with a density of 4.0 g/ml. The wafers were bonded to aluminum overlays which were 3/4 in. (1.89 cm) diam and 1/8 in. (0.32 cm) thick. 

The results are in reasonable agreement with some small-scale gap tests, which gave threshold initiation levels of 4-6 kbar for lead azide [50] they are also consistent with an experiment performed by Roth [28], who observed an initiation in 95% lead azide-5% Teflon (p = 2.7 g/ml) subjected to an 8.5-10-kbar shock. 

The shock-initiation experiments perfonned on KDNBF pellets are given for comparison [49.51]. The minimum thickness or run-up distance for KDNBF for 

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