Abstract
Time differential perturbed angular distributions of nanosecond-levels of some rare earth nuclei embedded in a ferromagnetic host lattice have been measured. Coulomb excitation with 4–10 MeV α-particles and recoil implantation technique have been used. Some evidences have been found for anomalous hyperfine fields acting on the nucleus in a time period which cannot be resolved. On a time scale starting at about 1 nsec where details can be resolved, the hypothesis of a static hyperfine field parallel to the external polarizing field seems to be justified.
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Work supported by Bundesministerium für wissenschaftliche Forschung.
The authors are indebted to Dr. L.Lehmann, Mr. R.Brenn and Mr. H.Wolf for their assistance during the course of the experiment. The cooperation of Dr. G.Busch and the operating staff of theVan de Graaff is acknowledged. We have also to thank Miss G.Born for preparing part of the targets. The calculations were done on the IBM 7040 computer of the Rechenzentrum der Universität Freiburg.
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Klepper, O., Spehl, H. & Wertz, N. Anomalous hyperfine fields detected with the differential angular correlation method. Z. Physik 217, 425–437 (1968). https://doi.org/10.1007/BF01394183
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DOI: https://doi.org/10.1007/BF01394183