Electron spin relaxation and tunnelling methyl groups
- 14 October 1978
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 11 (19) , 4055-4067
- https://doi.org/10.1088/0022-3719/11/19/016
Abstract
The energy transfer has been studied between free radicals and nearby tunnelling methyl groups near the resonant condition that the electron Larmor frequency and the methyl tunnelling frequency are equal. The measurements were made in a gamma -irradiated single crystal of 4-methyl-2,6-ditertiarybutylphenol (MDBP) at 4.2K and consisted of saturating the ESR signal and observing its return to equilibrium. This has been done at eleven ESR frequencies in the range 8.97< nu st and that the only coupling between the electrons and the methyl groups is the intermolecular dipole-dipole interaction.Keywords
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