The anglar dependence of emitted NQR signal intensity from a polycrystalline hexamethylenetetramine has been investigated. Measurement from the radial direction reveals that the NQR signal from a long column sample showed a very inhomogeneous radiation pattern which has strong signal along the direction of the excitation and few along the perpendicular direction from the excitation axis. A series of measurement by a receiver set face to face to the sample at every 10° from 0° to 350° from the excitation direction revealed that the signal intensity measured has a trigonometric divergence. This is useful to design an antenna coil of a landmine detector to get strong NQR signal remotely.

Date Published: 27 April 2007
PDF: 6 pages
Proc. SPIE 6553, Detection and Remediation Technologies for Mines and Minelike Targets XII, 65531X (27 April 2007); doi: 10.1117/12.720160

Published in SPIE Proceedings Vol. 6553:
Detection and Remediation Technologies for Mines and Minelike Targets XII
Russell S. Harmon; J. Thomas Broach; John H. Holloway Jr., Editor(s)