Modern microcenter heat explosion model

Modernization and investigation of the microcenter heat explosion model of the energetic materials initiated by the pulse radiation was made in this paper. Absorptivity of aluminium nanoparticles in PETN-matrix was calculated and was taken into account. Dependences of the absorptivity on the particles' sizes and wave length of irradiation was also taken into account. It was shown that the particle's radius, which corresponds to the absorption maximum, and the peak value both depend on the irradiation wave length. For the first harmonic of the ND:YAG laser the absorption maximum corresponds to the nanoparticle's radius 100 nm, for the second harmonic to the radius it is 44 nm. The peak value increases from 0.2942 to 0.7064. Dependences of the critical initiation energy densities on the metal inclusions' radii were calculated for the energetic materials. It was concluded that the RDX – aluminium composite is the perspective material to use in optic detonator especially for the second harmonic of the ND:YAG laser