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Estimation of the Influence of Lattice Resonant Modes on the Nuclear Quadrupole Spin–Lattice Relaxation

✍ Scribed by E. Mühle

Publisher
John Wiley and Sons
Year
1972
Tongue
English
Weight
455 KB
Volume
51
Category
Article
ISSN
0370-1972

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✦ Synopsis

Abstract

The influence of nonparamagnetic point and line defects in the crystal lattice on the nuclear quadrupole spin‐lattice relaxation is studied. Under the assumption of simple models for defects in a cubic lattice it is shown that lattice resonant modes cause at low temperature an increase of the local relaxation rate around the defects. The efficiency of spin diffusion is estimated. Measurable effects are expected only with relatively high concentrations of defects.

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✍ J. Seliger; V. Žagar; T. Asaji 📂 Article 📅 2009 🏛 Elsevier Science 🌐 English ⚖ 775 KB

The temperature dependence of the 14 N nuclear quadrupole resonance frequencies in pyridazine perchlorate has been measured by double resonance. The results show that in the low temperature phase the pyridazinium ions are static, while in the high temperature phase the ions reorient around the norma