| 书目名称 | Explosives Detection using Magnetic and Nuclear Resonance Techniques | | 编辑 | Jacques Fraissard,Olga Lapina | | 视频video | | | 概述 | Comprehensive theoretical and technical coverage of NQR for explosives detection.Latest developments from leading experts in the field.Vastly more information in one book than can be found by mining t | | 丛书名称 | NATO Science for Peace and Security Series B: Physics and Biophysics | | 图书封面 |  | | 描述 | .Nuclear quadrupole resonance (NQR) a highly promising new technique for bulk explosives detection: relatively inexpensive, more compact than NMR, but with considerable selectivity. Since the NQR frequency is insensitive to long-range variations in composition, mixing explosives with other materials, such as the plasticizers in plastic explosives, makes no difference. The NQR signal strength varies linearly with the amount of explosive, and is independent of its distribution within the volume monitored. NQR spots explosive types in configurations missed by the X-ray imaging method...But if NQR is so good, why it is not used everywhere? Its main limitation is the low signal-to-noise ratio, particularly with the radio-frequency interference that exists in a field environment, NQR polarization being much weaker than that from an external magnetic field. The distinctive signatures are there, but are difficult to extract from the noise. In addition, the high selectivity is partly a disadvantage, as it is hard to build a multichannel system necessary to cover a wide range of target substances. Moreover, substances fully screened by metallic enclosures, etc. are difficult to detect. A wor | | 出版日期 | Conference proceedings 2009 | | 关键词 | Biophysics; Mobile NMR; NATO; NMR; NQR Explosives Detection; Nuclear Quadrupole Resonance (NQR) Technique | | 版次 | 1 | | doi | https://doi.org/10.1007/978-90-481-3062-7 | | isbn_softcover | 978-90-481-3061-0 | | isbn_ebook | 978-90-481-3062-7Series ISSN 1874-6500 Series E-ISSN 1874-6535 | | issn_series | 1874-6500 | | copyright | Springer Science+Business Media B.V. 2009 |
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发表于 2025-3-21 16:29:46
