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Theory of coherent quasi-steady states in NQR multipulse experiments

✍ Scribed by V. L. Ermakov; D. Ya. Osokin

Publisher
John Wiley and Sons
Year
1983
Tongue
English
Weight
580 KB
Volume
116
Category
Article
ISSN
0370-1972

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✦ Synopsis

Abstract

On the basis of the average Hamiltonian theory the influence of the pulse sequence t β€” (Ο„ β€” t β€” 2Ο„ β€” t β€” Ο„)n on a system of two dipolar coupled equivalent spin‐1 nuclei each subject to local electric field gradients is studied. Using a fictitious spin‐1/2 formalism a general method is developed for solving the Liouville equation for such spin systems, leading to results which reproduce the experimentally observed quasi‐steady state of magnetization in nitrogen‐14 pulse experiments. Expressions for the density matrix of the system in terms of the effective time __n__4Ο„ and the parameters characterizing the quadrupolar and dipolar interactions are obtained.

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