Abstract
Using a gaseous H2 75Se source at low pressure the perturbed directional correlation of the 121–279 keVγγ cascade of75As was measured as a function of an external magnetic field. The anisotropy shows a pronounced resonance behaviour around zero field. This effect may be understood as being due to the hyperfine interaction of the nucleus with the electronic shell of the highly charged ion formed after electron capture. The charge distribution of the As ions was estimated and the spin distribution derived from it. Then a comparison with the theory of Leisi was possible giving a qualitative agreement between theory and experiment.
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The authors wish to express their gratitude to Prof. Dr. A. Flammersfeld for his encouraging support of this investigation. They thank Prof. Dr. H. Langhoff for fruitful discussions in an early state of this work. They are indebted to Dr. L. Ziegeler for his help in the chemical preparation of the sources.
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Borchert, I., Schumacher, M. & Smend, F. Resonance behaviour of a perturbed gamma gamma directional correlation in a magnetic field. Z Physik A 272, 197–202 (1975). https://doi.org/10.1007/BF01408147
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DOI: https://doi.org/10.1007/BF01408147