Polarization enhancement of NQR signals for explosive detection

摘要

This paper presents first experiments on using Zeeman polarization-enhanced nuclear quadrupole resonance (NQR) method in detecting explosive substance pentaerythritoltetranitrate (PETN). The NQR signals were detected oil nitrogen nuclei at room temperature using a multipulse spin-locking sequence after the sample was kept in a very inhomogeneous magnetic field. The dependence of enhancement factor on the time of protons polarization in the magnetic field was studied. (c) 2006 Elsevier Ltd. All rights reserved.