Spin-lattice relaxation of the O2 − molecule-ion in the potassium halides |
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Authors: | Prof. Dr. T. G. Castner Jr. |
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Affiliation: | (1) Department of Physics and Astronomy, University of Rochester, 14627 Rochester, New York, USA |
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Abstract: | An experimental and theoretical study of the spin-lattice relaxation (SLR) of the O2 ? molecule-ion in the potassium halides has been made. The SLR rate was measured by several methods between 1.32°K and 36°K with a 3 cm. ESR spectrometer. The results indicate a one phonon process with a large anisotropy dominates forT<2°K.T 1 is much longer for the magnetic field parallel to the molecular axis. Detailed theoretical calculations indicate a new SLR process, namely phonon-induced libration of the molecular axis, can probably explain the field parallel case. The Van Vleck SLR process can account for the field-perpendicular case. |
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