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Level crossing in hyperfine interactions studied by perturbed γ-γ angular correlations

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Zeitschrift für Physik A Hadrons and nuclei

Abstract

The technique of differential γ-γ angular correlation measurements has been applied to an investigation of the hyperfine interactions in the 482 keV level of181Ta. The activity was embedded in the lattice of a hafnium single crystal. The investigation of the quadrupole interaction gave for the electric interaction frequencyω 0=(313±4) MHz. The electric field gradient was found to be axially symmetric, the asymmetry parameter beingη<0.1.

Furthermore the combined collinear magnetic dipole and electric quadrupole interaction was studied. The angular correlation was investigated as a function of the strength of the external magnetic field by integral as well as time differential measurements. The integral anisotropy as function of the magnetic field has the shape of a resonance curve. The maximum was observed at a magnetic field ofB res=(24.2±0.5)kG.

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Author notes

  1. R. M. Lieder

    Present address: Institut für Kernphysik, Kernforschungsanlage, Jülich, Germany

Authors and Affiliations

  1. Institut für Strahlen- und Kernphysik der Universität, Bonn, Germany

    R. M. Lieder, N. Buttler, K. Killig & K. Beck

Authors
  1. R. M. Lieder
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  2. N. Buttler
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  3. K. Killig
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  4. K. Beck
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Additional information

We want to express our gratitude to Prof. E. Bodenstedt for his continuous support of this work and for innumerable helpful discussions. We like to thank Prof. E. Jumpertz and Mr. P. Otten of the Mineralogisch-Petrologische Institut of the University of Bonn for the preparation of the hafnium single crystal and for the crystal structure analysis.

The numerical calculations were performed on the IBM 7090 computer of the Rheinisch-Westfälisches Institut für Instrumentelle Mathematik, Bonn. The financial support by the Bundesministerium für Wissenschaftliche Forschung and by the Landesamt für Forschung des Landes Nordrhein-Westfalen is gratefully acknowledged.

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Lieder, R.M., Buttler, N., Killig, K. et al. Level crossing in hyperfine interactions studied by perturbed γ-γ angular correlations. Z. Physik 237, 137–154 (1970). https://doi.org/10.1007/BF01404474

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  • DOI: https://doi.org/10.1007/BF01404474

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