H-1-N-14 Cross-Relaxation In Trinitrotoluene - A Step Toward Improved Landmine Detection

Motivated by the lack of efficient detection techniques for metal-free trinitrotoluene (TNT) containing landmines, H-1-N-14 cross -relaxation experiments on TNT have been performed using field-cycling spectroscopy in an electronically switchable volume coil. Using H-1 NMR detection (indirect method), the N-14 quadrupole spectra in several small (about 0.5 g) TNT samples of different producers are determined. The experiment is considered as a step toward a double resonance TNT landmine detection scheme using surface coils.