TITLE

A pulse nuclear quadrupole resonance spectrometer

AUTHOR(S)
Brailovskii, V. V.
PUB. DATE
March 2010
SOURCE
Instruments & Experimental Techniques;Mar2010, Vol. 53 Issue 2, p284
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A pulse nuclear quadrupole resonance (NQR) spectrometer intended for studying the resonance signal spectra of nuclei of solid substances in a 1- to 30-MHz band is described. The pulse duration of excitation pulses is regulated from 10 to 100 �s at a 5- to 100-Hz pulse repetition rate. The spectrometer ensures a probing pulse power of up to 1.5 kW and is characterized by the availability of an NQR signal simulator, a low-noise preamplifier, and a phase detector with a dynamic range exceeding 100 dB. The efficiency of the spectrometer has been tested by studying the NQR spectrum of 14N nuclei in urotropine. The spectrometer ensured a possibility of detecting 0.2 g of urotropine.
ACCESSION #
49781445

 

Related Articles

  • Special features of remote observations of weak signals from 14N nuclear quadrupole resonance. Grechishkin, V. S.; Shpilevoi, A. A.; Dykin, V. A. // Russian Physics Journal;Aug2008, Vol. 51 Issue 8, p778 

    The case of excitation of nuclear quadrupole resonance (NQR) in nitrogen-containing compounds is examined for significant sample removal under conditions of strong dispersion of the registered signal. Principal limitations on the sensitivity of remote NQR observations are demonstrated. A method...

  • Slick operation. Wilks, Neil // Environmental Engineering;Feb2011, Vol. 24 Issue 1, p29 

    The article focuses on a nuclear magnetic resonance (NMR) spectrometer that can rapidly assess the condition of a patient's metabolism sample and provide accurate information to surgeons in about 20 minutes, installed at St Mary's Hospital in Paddington, England. A definition of metabolism is...

  • Detector for Nuclear Quadrupole Resonance Spectroscopy. Chytil, J.; Kubasek, R. // PIERS Proceedings;Aug2014, p1907 

    Nuclear quadrupole resonant spectroscopy is method similar to nuclear magnetic resonant spectroscopy also called zero field NMR [1, 2]. The response signal magnitude is very low and it is immersed in to the noise. There can be used some methods to harvest signal from noise it can be matched...

  • Cross-relaxation in multiple pulse NQR spin-locking. Beltjukov, P. A.; Kibrik, G. E.; Furman, G. B.; Goren, S. D. // Hyperfine Interactions;2007, Vol. 181 Issue 1-3, p115 

    The experimental and theoretical NQR multiple-pulse spin locking study of cross-relaxation process in solids containing nuclei of two different sorts I > 1/2 and S = 1/2 coupled by the dipole–dipole interactions and influenced by an external magnetic field. Two coupled equations for the...

  • Study of 14N NQR response to SORC pulse sequence. Konnai, A.; Odano, N.; Asaji, T. // Hyperfine Interactions;2007, Vol. 181 Issue 1-3, p93 

    The behavior of nuclear quadrupole resonance (NQR) signals between RF pulses of the strong off-resonance comb (SORC) as well as the spin-locking spin-echo (SLSE) pulse sequences was studied as for 14N NQR line ν + of dimethylnitramine (CH3)2NNO2 at 77 K. The periodic variation of the signal...

  • Calculation of properties of the ozone molecule by the multiconfigurational self-consistent field method. Minaev, B.; Khomenko, E. // Journal of Applied Spectroscopy;Nov2005, Vol. 72 Issue 6, p781 

    For the ground state of the ozone molecule, by using the multiconfigurational self-consistent field method, we calculated the electric and magnetic properties — quadrupole moment, polarizability, tensor of magnetic susceptibility, nuclear quadrupole interaction constant, and the...

  • Incommensurate helical magnetic order in LiCu2O2 and NaCu2O2 quasi-one-dimensional compounds. Gippius, A. A.; Moskvin, A. S.; Morozova, E. N.; Okhotnikov, K. S. // Journal of Experimental & Theoretical Physics;Aug2007, Vol. 105 Issue 1, p86 

    The results of the measurements of the 6, 7Li and 23Na nuclear magnetic resonance (NMR) and 63, 65Cu nuclear quadrupole resonance in LiCu2O2 and NaCu2O2 quasi-one-dimensional compounds with a spin chains in the paramagnetic and magnetically ordered states are presented. The shape of the NMR line...

  • Effect of the Nuclear Magnetization Diffusion on the Relaxation Time Distribution in Microcrystals. Sinyavsky, N. // Russian Physics Journal;Dec2014, Vol. 57 Issue 8, p1149 

    The article presents a study which investigates the effect of the nuclear magnetization diffusion on the character of the relaxation time distribution. It mentions that application of the inverse Laplace transformation to relaxometry of nuclear quadrupole resonance (NQR) offers significant...

  • A New Method to Obtain Frequency Offsets in NQR Multi-Pulse Sequences. Cerioni, Lucas M. C.; Pusiol, Daniel J. // Hyperfine Interactions;2004, Vol. 159 Issue 1-4, p389 

    A new method to improve the signal to noise ratios in multi-pulse nuclear quadrupole resonance (NQR) sequences was developed. In this method, called TONROF, the transmitter frequency is set on-resonance, while the receiver frequency is offset. Experimental results of using TONROF in conjunction...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics