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Pulsed Nuclear Quadrupole Resonance Instrumentation And Study Of The 14n Spectrum And Relaxation In Sodium Nitrite
Download Pulsed Nuclear Quadrupole Resonance Instrumentation And Study Of The 14n Spectrum And Relaxation In Sodium Nitrite full books in PDF, epub, and Kindle. Read online Pulsed Nuclear Quadrupole Resonance Instrumentation And Study Of The 14n Spectrum And Relaxation In Sodium Nitrite ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Pulsed Nuclear Quadrupole Resonance Instrumentation and Study of the 14N Spectrum and Relaxation in Sodium Nitrite by : Gary LeMarr Petersen
Download or read book Pulsed Nuclear Quadrupole Resonance Instrumentation and Study of the 14N Spectrum and Relaxation in Sodium Nitrite written by Gary LeMarr Petersen and published by . This book was released on 1975 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Second International Symposium on Nuclear Quadrupole Resonance Spectroscopy by : A. Colligiani
Download or read book Proceedings of the Second International Symposium on Nuclear Quadrupole Resonance Spectroscopy written by A. Colligiani and published by . This book was released on 1975 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Zeitschrift Für Naturforschung written by and published by . This book was released on 2000 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Signal Processing and Analysis Techniques for Nuclear Quadrupole Resonance Spectroscopy by : Cristian Monea
Download or read book Signal Processing and Analysis Techniques for Nuclear Quadrupole Resonance Spectroscopy written by Cristian Monea and published by Springer Nature. This book was released on 2021-10-11 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is about improving prohibited substances detection using the nuclear quadrupole resonance (NQR) technique at security checkpoints. The book proposes multiple signal processing and analysis techniques for improving detection of dangerous or contraband substances, such as explosives, narcotics, or toxic substances. Also, several hardware solutions are described and implemented in a custom-designed NQR spectrometer. A new approach to NQR signal detection is introduced using artificial intelligence/deep learning techniques. The book will be useful for for researchers and practitioners in the areas of electrical engineering, signal processing and analysis, applied spectroscopy, as well as for security or laboratory equipment manufacturers.
Book Synopsis Magnetic Resonance Detection of Explosives and Illicit Materials by : Tomaž Apih
Download or read book Magnetic Resonance Detection of Explosives and Illicit Materials written by Tomaž Apih and published by Springer. This book was released on 2013-10-02 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detection of concealed explosives is a notoriously difficult problem, and many different approaches have been proposed to solve this problem. Nuclear quadrupole resonance (NQR) is unique in many ways. It operates in a safe AM radio frequency range, and it can remotely detect unique “fingerprint” (NQR spectrum) of many explosives, such as TNT or RDX. As such, the detection of target does not depend on the shape or material of the container, or the presence of metallic object such as triggers etc. Spectra of chemically similar compounds differ enough that their presence never causes interference or false alarms. Unfortunately, widespread use is prevented due to low sensitivity, radiofrequency interference from the noisy environment, and inability to detect liquid explosives. This book presents current state of the art of the attempts to overcome NQR sensitivity problem, either by increasing the strengths of signals generated, or by increasing the specificity of the technique through a better understanding of the factors that affect the quadrupolar parameters of specific explosives. The use of these specific quadrupolar parameters is demonstrated on signal processing techniques that can detect weak signals, which are hidden in a noisy background. The problem of differentiation of liquid explosives and benign liquids in closed containers is approached by measurements of different nuclear magnetic resonance (NMR) parameters. As shown, a couple of solutions has reached a prototype stage and could find their use in a near future.
Book Synopsis Nuclear Quadrupole Spin Dynamics by : David W. Prescott
Download or read book Nuclear Quadrupole Spin Dynamics written by David W. Prescott and published by . This book was released on 2010 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear quadrupole resonance (NQR) is a type of radio-frequency (rf) spectroscopy which can detect quadrupolar nuclei (I > 1=2), such as nitrogen, in crystalline solids. NQR spectroscopy is useful for the detection of the many types of explosives containing 14N, however it suffers from a low signal to noise ratio (SNR) particularly in samples with long spin-lattice relaxation times. To improve the SNR the nuclear quadrupole spin dynamics are exploited in two limiting cases: systems with long spin relaxation times and systems where the excitation power is limited. The former is addressed through double resonance effects and the latter through spin echoes created by weak rf pulses. The double resonance effect occurs in samples that also contain a second faster relaxing nuclear species, such as 1H in ammonium nitrate. In this sample an 1H-14N double resonance can be created between the species that improves the SNR. While the focus is on the common case of solids containing both nitrogen and hydrogen, the theory is generally applicable to solids containing spin-1 and spin-1/2 nuclei. A model of this system is developed that treats the motionally averaged secular dipolar Hamiltonian as a perturbation of the combined quadrupole and Zeeman Hamiltonians. This model reveals three types of double resonance conditions, involving static and rf fields, and predicts expressions for the cross-relaxation rate (Wd) between the two species. Using this cross-relaxation rate, in addition to the hydrogen and nitrogen autorelaxation rates, expressions governing the relaxation back to equilibrium in a spin-1/2 and spin-1 system are determined. The three different types of double resonance conditions are created experimentally; one of them for the first time in any system and another for the first time in a solid. Under these double resonance conditions, the increase in Wd and improvements in SNR are explored both theoretically and experimentally using ammonium nitrate. The second effect investigated is the NQR spin echo that forms after excitation of a powder sample by a single weak resonant radio-frequency pulse. This single- pulse echo is identified for the first time, and when applications are limited by a weak rf field, can be used effectively to increase the SNR over conventional detection techniques.
Book Synopsis Detection of Bulk Explosives Advanced Techniques against Terrorism by : Hiltmar Schubert
Download or read book Detection of Bulk Explosives Advanced Techniques against Terrorism written by Hiltmar Schubert and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detection of Bulk Explosives: Advanced Techniques against Terrorism contains reviews of: existing and emerging bulk explosives detection techniques; scientific and technical policy of the Federal Border Service of the Russian Federation; challenges in application and evaluation of EDS systems for aviation security; multi-sensor approach to explosives detection. There are also reports devoted to the following individual explosive detection techniques: X-ray systems in airports; neutron in, gamma out techniques; neutron and gamma backscattering; nuclear quadruple resonance, including remote NQR; sub-surface radars; microwave scanners; laser-induced burst spectroscopy (LIBS); acoustic sensors; nonlinear location (NUD); systems for localization and destruction of explosive objects.
Book Synopsis Spectroscopic Properties of Inorganic and Organometallic Compounds by : G Davidson
Download or read book Spectroscopic Properties of Inorganic and Organometallic Compounds written by G Davidson and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectroscopic Properties of Inorganic and Organometallic Compounds provides a unique source of information on an important area of chemistry. Divided into sections mainly according to the particular spectroscopic technique used, coverage in each volume includes: NMR (with reference to stereochemistry, dynamic systems, paramagnetic complexes, solid state NMR and Groups 13-18); nuclear quadrupole resonance spectroscopy; vibrational spectroscopy of main group and transition element compounds and coordinated ligands; and electron diffraction. Reflecting the growing volume of published work in this field, researchers will find this Specialist Periodical Report an invaluable source of information on current methods and applications. Specialist Periodical Reports provide systematic and detailed review coverage in major areas of chemical research. Compiled by teams of leading experts in their specialist fields, this series is designed to help the chemistry community keep current with the latest developments in their field. Each volume in the series is published either annually or biennially and is a superb reference point for researchers. www.rsc.org/spr
Book Synopsis Pulsed Nuclear Quadrupole Resonance Spectroscopy by : Cedric John Gabriel
Download or read book Pulsed Nuclear Quadrupole Resonance Spectroscopy written by Cedric John Gabriel and published by . This book was released on 1964 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Analytical Method for Estimating the 14N Nuclear Quadrupole Resonance Parameters of Organic Compounds with Complex Free Induction Decays for Radiation Effects Studies by :
Download or read book An Analytical Method for Estimating the 14N Nuclear Quadrupole Resonance Parameters of Organic Compounds with Complex Free Induction Decays for Radiation Effects Studies written by and published by . This book was released on 1992 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of 14N nuclear quadrupole resonance (NQR) as a radiation dosimetry tool has only recently been explored. An analytical method for analyzing 14N NQR complex free induction decays is presented with the background necessary to conduct pulsed NQR experiments. The 14N NQR energy levels and possible transitions are derived in step-by-step detail. The components of a pulsed NQR spectrometer are discussed along with the experimental techniques for conducting radiation effects experiments using the spectrometer. Three data analysis techniques -- the power spectral density Fourier transform, state space singular value decomposition (HSVD), and nonlinear curve fitting (using the downhill simplex method of global optimization and the Levenberg-Marquart method) -- are explained. These three techniques are integrated into an analytical method which uses these numerical techniques in this order to determine the physical NQR parameters. Sample data sets of urea and guanidine sulfate data are used to demonstrate how these methods can be employed to analyze both simple and complex free induction decays. By determining baseline values for biologically significant organics, radiation effects on the NQR parameters can be studied to provide a link between current radiation dosimetry techniques and the biological effects of radiation.
Book Synopsis 14N Pulsed Nuclear Quadrupole Resonance by : Daniel Canet
Download or read book 14N Pulsed Nuclear Quadrupole Resonance written by Daniel Canet and published by . This book was released on 2006 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 14N Pulsed Nuclear Quadrupole Resonance by :
Download or read book 14N Pulsed Nuclear Quadrupole Resonance written by and published by . This book was released on 2005 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pulse Studies in Pure Nuclear Quadrupole Resonance Spectroscopy by : Robert Arthur Caldwell
Download or read book Pulse Studies in Pure Nuclear Quadrupole Resonance Spectroscopy written by Robert Arthur Caldwell and published by . This book was released on 1970 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bibliography of Titles of Articles in the Field of Nuclear Quadrupole Resonance Spectroscopy of Solids by : Richard G. Barnes
Download or read book Bibliography of Titles of Articles in the Field of Nuclear Quadrupole Resonance Spectroscopy of Solids written by Richard G. Barnes and published by . This book was released on 1958 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nuclear Quadrupole Resonance Spectroscopy Data by : H. Chihara
Download or read book Nuclear Quadrupole Resonance Spectroscopy Data written by H. Chihara and published by Springer. This book was released on 1997-11-25 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume III/39 continues the compilation of nuclear quadrupole resonance spectroscopy data of solid substances which started in with volumes III/20 and III/31. The literature from the beginning of nuclear quadrupole resonance spectroscopy in 1951 to 1996 is covered. Included are the data for substances studied for the first time, as well as data for substances already present in the previous volumes if the data published there could be completed or improved by new studies. In total there are more than 10.000 substances in the volumes, showing the scope and significance of nuclear quadrupole resonance spectroscopy up to recent times. A few, minor modifications are explained in the introduction (chapter 1). Volume III/39 can be consulted without recourse to its predecessor because the complete introduction and general tables are repeated from III/20 and III/31.
Book Synopsis Pulse and Double Resonance Methods in Nuclear Quadrupole Resonance Spectroscopy by : Patrick Stephen Ireland
Download or read book Pulse and Double Resonance Methods in Nuclear Quadrupole Resonance Spectroscopy written by Patrick Stephen Ireland and published by . This book was released on 1975 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Nuclear Quadrupole Resonance by : John Alec Sydney Smith
Download or read book Advances in Nuclear Quadrupole Resonance written by John Alec Sydney Smith and published by John Wiley & Sons. This book was released on 1983-09 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
