Wie genau kann man heute in der EPR-Spektroskopie g-Faktoren messen?
Open Access
- 1 November 1967
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung A
- Vol. 22 (11) , 1704-1710
- https://doi.org/10.1515/zna-1967-1107
Abstract
In the past few years theoretical aspects of the g-factors of aromatic hydrocarbon radicals have been developed. Since the g-factor variation of these radicals is only of the order of 10-4 precise measurements of these quantities are clearly called for. Absolute g-factor measurements are performed according to the equation g=C ω/ωp. A survey of the different determinations of the conversion factor C=2 γp′ m c/e is given and a value of C=3.0419890 × 10-3± 0.5 ppm is proposed for a well defined proton NMR probe. The most important effects are discussed which may shift the measured EPR and NMR frequencies ω and ωp.Keywords
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