ISSN:
1432-2153
Keywords:
Expansion of detonation products
;
Lead azide
;
Supersonic nozzle
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
,
Technology
Notes:
Abstract The cloud of products formed following the detonation of lead azide (LA) contains gaseous species and solid particles. The dynamics of the detonation products expanding freely or through a supersonic nozzle into vacuum is unraveled via the temporal profiles of the pressure, the emission from Pb atoms and the attenuation of a He-Ne beam. The velocity of the fastest gaseous species is found from the onset of the pressure rise and the emission at a given distance from the LA sample, and the velocity of the fastest solid particles from the attenuation. In the free expansion, the respective velocities are 4.5±0.1 and 3.8±0.2 km/s and in the nozzle expansion 5.1±0.2 and 1.4±0.2 km/s. The expansion into atmospheric pressure air is also monitored and found to be much slower than that into vacuum. The utilization of nozzles as a means for obtaining a particle free, transparent medium of detonation products is stressed in the context of exploiting explosives for achieving chemical lasers in the visible wavelength region.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01414627
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