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UFN, Forthcoming paper (Mi ufn6334)  

REVIEWS OF TOPICAL PROBLEMS

Current state of the spin exchange theory in dilute solutions of paramagnetic particles

K. M. Salikhov

Zavoisky Physical Technical Institute, Kazan Scientific Center of the Russian Academy of Sciences

Abstract: The kinetic equations for single-particle spin density matrices with Heisenberg exchange interaction in bimolecular collisions of particles and dipole-dipole spin-spin interaction between particles are presented. The results of calculations of the effective spin exchange radius for a number of model situations are summarized. The characteristic manifestations of spin exchange and dipole-dipole spin-spin interaction in the form of electron paramagnetic resonance (EPR) spectra are described. A modern approach to determining the rate of the bimolecular spin exchange process from the analysis of EPR spectra is presented. Set forth a new interpretation of the effect of exchange narrowing of ESR spectra .

DOI: https://doi.org/10.3367/UFNr.2018.08.038421


English version:
Physics–Uspekhi, 2019, 62

Document Type: Article
Received: June 28, 2018
Revised: August 17, 2018
Accepted: August 31, 2018

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