The experimental realization of the two-frequency ¹⁴N nuclear quadrupole resonance (NQR) technique with use of the gradiometer radiofrequency (RF) probe for applications in the remote detection of explosives and other substances has been proposed. The planar two-frequency gradiometer has been designed, modeled and manufactured. The regions, where the RF magnetic fields are nearly orthogonal to each other, have been determined by finite-element modeling studies. The two-frequency experiments have been carried out for the detection of hexahydro-1,3,5-trinitro-s-triazine C₃H₆N₆O₆ (RDX). The possibility of the combined use of the two-frequency ¹⁴N NQR technique and the gradiometer RF probe in practice for detection of explosives hidden under clothes or underground has been also discussed.

已经提出了使用梯度计射频 (RF) 探头的双频¹⁴ N 核四极共振 (NQR) 技术的实验实现，用于远程检测爆炸物和其他物质。平面两频梯度计已经设计、建模和制造。RF 磁场几乎彼此正交的区域已通过有限元建模研究确定。用于检测的两个频率的实验已经进行了六氢-1,3,5- trinitro-小号嗪Ç ₃ ħ ₆ Ñ ₆ ø ₆（RDX）。双频组合使用的可能性¹⁴还讨论了 N NQR 技术和梯度计 RF 探头在实践中用于检测隐藏在衣服下或地下的爆炸物。