The explosive decomposition of pentaerythritol tetranitrate (PETN) pressed pellets containing metal nanoparticles initiated by laser pulses was studied. The critical energy density values, which are the ones that make the sample to explode with 50% probability, were experimentally determined for PETN pellets containing nickel nanoparticles with three average radii initiated by the radiation of 1st harmonics of neodymium laser. It was shown that the critical energy density for PETN -Ni samples anti-correlates with the linear absorption coefficient determined with the optoacoustic approach. The dependence of the critical energy density of PET N samples containing aluminum nanoparticles on their weight percent concentration was measured using the influence of 1st and 2nd harmonics of the laser. It was determined that the minimum critical energy density for both wavelengths coincide while the minimum abscissae, providing almost equal linear absorption coefficient, values are different. The variation of dopants' nanoparticles' radius and concentration makes it possible to regulate the sensitivity of PETN to laser influence.
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