Triple Resonance Enhanced Nuclear Quadropole Resonance Detection of TNT and Other Explosives
| Publication Number: |
SI21715A |
| Application Date: |
12. 1. 2004 |
| Assignee/Applicant: |
Jožef Stefan Institute [SI] |
| Inventor: |
Tomaž Apih, Robert Blinc, Gojmir Lahajnar, Janez Seliger |
| Title: |
Trojnoresonančna ojačena jedrska kvadrupolna resonančna detekcija TNT in drugih eksplozivov [SL], Triple Resonance Enhanced Nuclear Quadropole Resonance Detection of TNT and Other Explosives [EN] |
| Description: |
The subject of the invention is a new triple-resonance polarization-enhanced NQR method for the detection of trinitrotoluene (TNT) and other explosives as well as narcotics and drugs containing low-frequency NQR nuclei, such as 14N nuclei, in addition to high-frequency nuclei such as chlorine, bromine, 17 O. The invention based on the use of high-frequency nuclei, such as chlorine, bromine, or 17 O, to polarize protons through level crossing or „solid effect“ and to detect a low-frequency NQR (e.g., 14 N) signal by pulsed NQR at a distance. Compared to the previously proposed quadrupole-quadrupole polarization amplified technique, the new method avoids the problem of slow spin diffusion during polarization in a 14 N quadrupole system by replacing double resonance with a triple resonance scheme. In this way, the spin diffusion of the polarization gain takes place in the proton system and not in the 14 N system. |
| Drawings: |
 |
| Category: |
Physical Sciences |
| Technology application codes: |
Physical and exact sciences, Protecting man and environment |
| Market application codes: |
Industrial products, Other |
| www: |
https://worldwide.espacenet.com/patent/search/family/034882412/publication/SI21715A?q=si21715 |
| Patent offices: |
UIL RS |
