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Polarization enhancement technique for nuclear quadrupole resonance detection
Affiliation:1. Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, 22761 Hamburg, Germany;2. Technische Universität Dresden, Institut für Kern- und Teilchenphysik, Zellescher Weg 19, 01069 Dresden, Germany;3. Technische Universität Dortmund, Lehrstuhl für Experimentelle Physik IV, Otto-Hahn-Str 4, 44221 Dortmund, Germany;4. Universität Erlangen, Erwin-Rommel-Str. 1, 91058 Erlangen, Germany;5. Czech Technical University Prague, Horská 3a/22, 128 00 Praha 2, Czech Republic;1. CERN, Geneva 23, 1211 Geneva, Switzerland;2. AUTH, Department of Physics, 54124 Thessaloniki, Greece;3. Fondazione CNAO, Strada Campeggi 53, 27100 Pavia, Italy;4. LNF-INFN, Via Fermi 40, 00044 Frascati, Italy;5. AEC-LHEP, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland;1. Department of Energy Engineering and Physics, Amirkabir University of Technology (Tehran Polytechnic), P.O. Box 15875-4413, Hafez Avenue, Tehran, Iran;2. Department of Electrical Engineering, Amirkabir University of Technology (Tehran Polytechnic), P.O. Box 15875-4413, Hafez Avenue, Tehran, Iran;1. Department of Chemistry, Durham University, Science Site, South Road, Durham DH1 3LE, United Kingdom;2. Australian Nuclear Science and Technology Organisation, Lucas Heights 2234, NSW, Australia;3. Institut Laue-Langevin, Grenoble, France;4. Research School of Chemistry, Australian National University, Canberra, ACT, Australia
Abstract:We demonstrate a dramatic increase in the signal-to-noise ratio (SNR) of a nuclear quadrupole resonance (NQR) signal by using a polarization enhancement technique. By first applying a static magnetic field to pre-polarize one spin subsystem of a material, and then allowing that net polarization to be transferred to the quadrupole subsystem, we increased the SNR of a sample of ammonium nitrate by one-order of magnitude.
Keywords:Nuclear quadrupole resonance (NQR)  Nitrogen-14  Polarization enhancement NQR  Ammonium nitrate
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