Document Type
Article
Version
Author's Final Manuscript
Publication Title
Molecular Physics
Volume
34
Publication Date
1977
Abstract
The nuclear spin symmetry conversion transition, whereby a methyl group changes tunnelling state (A↔E) and total nuclear spin (ΔI = ± 1), is made resonant by the flip of an unpaired electron spin (Δms = ± 1). The coupling between an unpaired electron in a free radical and a methyl group in a nearby molecule is via the inter-molecular spin-spin interaction. The matrix elements and transition probabilities for this transition are calculated explicitly. The motivation behind the calculation is to aid in the interpretation of electron spin relaxation experiments in γ-irradiated 4-methyl-2,6-t-butylphenol where these resonant transitions have a profound effect. The results presented have also been useful in the interpretation of nuclear magnetic resonance experiments in the same substance.
Citation
Beckmann, Peter A. 1977. "The electron-methyl group spin-spin interaction." Molecular Physics 34.3: 665-680.
DOI
https://doi.org/10.1080/00268977700102031