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Influence of molecular motions on NQR echoes

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Abstract

The influence of thermal molecular motions on spin echo decay in pure nuclear quadrupole resonance (NQR) is considered. Our calculations show that the Hahn echo decay is caused by dipole-dipole interaction of the nuclear spins and is strongly affected by molecular mobility that can lead to the shortening of the echo decay with increased temperature. Slow molecular motion yields an exponential τ3 time dependence, while fast motion yields an exponential decay. The outlined theory allows us to explain an unusual shortening of the35Cl NQR echo decay on heating in thiourea-C2Cl6 inclusion compound.

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Authors and Affiliations

  1. Institute of Physics, University of Szczecin, 70-451, Szczecin, Poland

    N. A. Sergeev & M. Olszewski

  2. Department of Physics, Ben-Gurion University of the Negev, Beer Sheva, Israel

    A. M. Panich

Authors
  1. N. A. Sergeev
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  2. A. M. Panich
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  3. M. Olszewski
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Correspondence to N. A. Sergeev.

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Sergeev, N.A., Panich, A.M. & Olszewski, M. Influence of molecular motions on NQR echoes. Appl. Magn. Reson. 27, 41–57 (2004). https://doi.org/10.1007/BF03166300

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  • DOI: https://doi.org/10.1007/BF03166300

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