The Raman electron spin-lattice relaxation process for diatomic molecules
| Autor: | C.H.M. Meyer, W. van Toledo, P. Box, J.C.M. Sprenkels, W.Th. Wenckebach, J.C. Voorhoeve, L. Korstanje, G.D.F. van Velzen |
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| Rok vydání: | 1987 |
| Předmět: |
chemistry.chemical_classification
Materials science Relaxation (NMR) General Engineering Spin–lattice relaxation Electron Molecular physics Diatomic molecule law.invention symbols.namesake Nuclear magnetic resonance chemistry law Vibrational energy relaxation symbols Electron paramagnetic resonance Raman spectroscopy Inorganic compound |
| Zdroj: | Physica B+C. 145:101-110 |
| ISSN: | 0378-4363 |
| DOI: | 10.1016/0378-4363(87)90071-4 |
| Popis: | In a previous paper we have calculated the theoretical temperature and angular dependence of the electron spin-lattice relaxation rate due to Raman processes for diatomic molecules. In this paper it is shown that these processes caused by normal lattice modes and resonance modes give a good explanation of the measured relaxation times of O−2 molecules in Ca(OH)2. For high temperatures (T > 6K) the relaxation is caused by the librational Raman process due to lattice modes with a T9 temperature dependence. The relaxation at lower temperatures is dominated by a Raman process due to resonance modes. The relaxation rate is then proportional to exp ( h ω r kT ) ( exp ( h ω r kT ) − 1) 2 and the frequency of the resonance mode ωr is approximately 2 K. |
| Databáze: | OpenAIRE |
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