Superradiation of a System of Nuclear Spins

D. S. Bulyanitsa, A. V. Druzhin, and E. D. Trifonov*

St. Petersburg State Pedagogical University, St. Petersburg, 191186 Russia
*e-mail: trifonov@ET1023.spb.edu

Received November 24, 1999

Abstract—The superradiation of a system of nuclear spins is investigated taking into account the broadening
of the NMR spectrum due to the stochasticity of the local magnetic field. The effect of the local field generated
by nuclear spins randomly distributed in space is investigated. In this case it is possible to achieve better agree-
ment with the experimentally observed characteristics of this phenomenon. Specifically, the possibility of a
monopulse regime with a high initial inversion of the spin polarization is explained. © 2000 MAIK
“Nauka/Interperiodica”.

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