Nitrogen-14 NQR Study of Energetic Materials
Abstract
The complete Nitrogen-14 NQR Spectrum of TNT was obtained for both the stable Phase (monoclinic) and the unstable (orthorhombic) phase. It was established that quadrupole coupling data are very sensitive to and can yield a measure of the angle of twist of the plane of the NO2 group away from the plane of the benzene ring about the CN bond. For the high explosive 1,3,5,7- tetranitro-1,3,5,7-tetraazacyclooctane (HMX), an analysis of the Nitrogen-14 NQR Spectrum and its temperature dependence yield details of the motion of the molecule in the solid. The Nitrogen-14 NQR Spectrum of RDX at 77 K was also reported. Finally, two instrumentation advances were made. A New pulse sequence, labelled SORC for Strong-Off-Resonant Comb of RF pulses, was introduced and some of its properties were studied. In addition, moved by a desire to display as much as possible of the crowded NQR spectrum of TNT as possible, Fourier transform techniques were extended to obtain close to an order-of-magnitude increase in the breadth of the spectrum displayed in a single Fourier transform.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1982
- Accession Number
- ADA119844
Entities
People
- Lawrence Leonard
- Raymond F. Connors
- Robert A. Marino