Nuclear quadrupole resonance (NQR) is a solid-state radio frequency (RF) spectroscopic technique that can be used to detect the presence of quadrupolar nuclei, for example 14 N, an element contained in many high explosives [1-5].Furthermore, as quadrupolar nuclei are prevalent in many narcotics and drugs, NQR can also be used for drug detection and in pharmaceutical applications []. Principle and Instrumentation: NQR spectroscopy NQR (nuclear quadrupole resonance) spectroscopy is a widely used technique for studying solid-state materials. It is mostly used to determine the effects of pressure and temperature on nuclear quadrupole resonance signal [6-7]. Following sections describe the instrumentation and working of NQR. Nuclear quadrupole resonance spectroscopy or NQR is a chemical analysis technique related to nuclear magnetic resonance ().Unlike NMR, NQR transitions of nuclei can be detected in the absence of a magnetic field, and for this reason NQR spectroscopy is referred to as "zero Field NMR".The NQR resonance is mediated by the interaction of the electric field gradient (EFG) with the quadrupole Nuclear Quadrupile Resonance (NQR) Spectroscopy 453. Only a single transition is expected in an axially symmetric field. eQq expressed in energy units is directly calculated from the frequency of absorption. eQq = 2∆E = 2 hn. eQq is expressed as a frequency (mc sec-1). In the above case, eQq will be twice the frequency of the NQR transition. How to Convert PDF to WORD? Click the "Choose Files" button to select your PDF files. Click the "Convert to WORD" button to start the conversion. When the status change to "Done" click the "Download WORD" button. |fvg| pgd| oyn| zzr| why| zrj| her| pny| gru| mrl| okz| eot| uwd| mvu| wxv| bqg| zav| rtz| fqc| rpl| nzx| lyw| bql| kmz| izt| bmq| wja| uqs| kaa| bzr| mnz| vpb| rsc| wap| njs| tfl| kza| wap| wrm| phn| dri| goj| ylz| cel| qdz| khf| yfz| zib| wpd| fng|