Abstract

The effects of the particle size, density and octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) content on 1,3,5-trinitroperhydro-1,3,5-triazine (RDX) nuclear quadrupole resonance (NQR) line have been studied at 5, 10, 15 and 20 °C. The RDX line at 3.41 MHz has been measured in 17 different quality lots. The RDX line was not modified in this temperature range but was strongly altered in some lots. No significant correlation was found between line characteristics and particle sizes or particle bulk densities. Correlation coefficients were computed between the HMX content measured using high-performance liquid chromatography and the NQR line intensity and NQR line width. Significant correlations were found. They were based on the study of 11 RDX lots which exhibited 4 different HMX contents from 0 to about 9 percent in weight. Further studies are needed to precise the HMX effect in relation with the HMX location. HMX can be located inside or outside the RDX crystal. Further studies are also needed to determine the line broadening mechanism.

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