Triplet-State Electron Spin Resonance of an H-Atom-Methyl-Radical Complex in a Solid Matrix
- 4 November 1966
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 151 (1), 207-210
- https://doi.org/10.1103/physrev.151.207
Abstract
The electron spin resonance of paramagnetic species produced by irradiation of solid methane at 4.2°K has been observed. In addition to the expected signals from individual H and C radicals, weaker signals from exchange-coupled H and C radicals were observed. The exchange interaction is isotropic, but there is an anisotropic dipole-dipole interaction between the aligned electron spin moments which gives rise to a splitting of 91 G. Analysis of this interaction indicates the separation of the coupled H and C to be 6.76 Å. The hyperfine splitting by the H is 255 G and that by each proton of the C group is 11.5 G, or one-half those for the isolated H and C. These features are shown to be in agreement with theoretical predictions. Similar effects were observed for C irradiated in a krypton matrix at 4.2°K.
Keywords
This publication has 13 references indexed in Scilit:
- Energy Migration and Isotopic Effects in Irradiated Solids at Low TemperaturePhysical Review B, 1964
- Electron Spin Resonance of Free Radicals Produced by Gamma Irradiation of Various Substances at 4.2°KPhysical Review B, 1962
- Exchange Effects in Spin Resonance of Impurity Atoms in SiliconPhysical Review B, 1955
- Spin Resonance of Impurity Atoms in SiliconPhysical Review B, 1955
- Hyperfine Splitting in Spin Resonance of Group V Donors in SiliconPhysical Review B, 1954
- Exchange Narrowing in Paramagnetic ResonanceReviews of Modern Physics, 1953
- Anomalous paramagnetism of copper acetateProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1952
- Paramagnetic Resonance Absorption of MicrowavesThe Journal of Chemical Physics, 1951
- The Theory of Magnetic Resonance-Line Widths in CrystalsProceedings of the Physical Society. Section A, 1950
- The Dipolar Broadening of Magnetic Resonance Lines in CrystalsPhysical Review B, 1948