Spectral-kinetic Characteristics of the Glow of RDX-Fe Composites During Explosive Decomposition Initiated by Neodymium Laser Pulses

Abstract

This work provides the results of measurements of spectral and kinetic characteristics of a luminescence at the explosive decomposition of RDX with the inclusions of ultradispersed particles of iron with the sizes of 75 nm in a maximum of distribution and a mass fraction of 0.4%. YAG:Nd3+ laser ($\lambda=1064\ \mathrm{nm},\ \tau_{\mathrm{i}}=14\ \mathrm{ns}$) was used as a source of initiation. The basic elements of the data-acquisition equipment were a polychromator and a streak camera. They were used for a luminescence spectrum scanning in time. Under the influence of a laser impulse, one was recorded the luminescence with its intensity falling down in time of ∼ 60 ns. The state of a maximum of the luminescence spectrum scanning depends on the energy density of a laser radiation $H$. At increasing $H$, the state of a maximum migrates from the visible to the ultraviolet area up to the value $\lambda=420\ \mathrm{nm}$. This luminescence is connected with the NO2. radicals which are formed during the influence of a laser impulse and variously excited. The luminescence of products of an explosion is observed in a microsecond time interval and has the thermal nature. The luminescence temperature is $T=3500\ \mathrm{K}$.