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Half-life,g-factor and relaxation of the nuclear orientation of the isomeric 11/2− state in139Pr

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

By time-differential observation of the perturbed angular distribution in an external magnetic field, the g-factor of the 11/2− isomeric state in139Pr has been measured, g = +1.20 ± 0.09. The angular distribution also shows an attenuation with relaxation time, τ R = 19 ± 6 ns. This relaxation is due to paramagnetic interaction of the nucleus with the 4f-electrons. Our determination of the isomeric half-life,T 1/2= 45.5 ±0.9 ns does not agree with previous measurements.

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Authors and Affiliations

  1. Natuurkundig Laboratorium van de Vrije Universiteit, Amsterdam

    T. J. Ketel, E. A. Z. M. Vervaet & H. Verheul

  2. CERN, 1211, Geneva 23, Switzerland

    T. J. Ketel

Authors
  1. T. J. Ketel
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  2. E. A. Z. M. Vervaet
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  3. H. Verheul
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Additional information

The authors wish to thank Dr. J. Rethmeier, Drs. C. Hoekstra and the operators of the cyclotron for their assistance, and J. Bouma for the realization of the target with molten Cerium.

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Ketel, T.J., Vervaet, E.A.Z.M. & Verheul, H. Half-life,g-factor and relaxation of the nuclear orientation of the isomeric 11/2− state in139Pr. Z Physik A 291, 319–322 (1979). https://doi.org/10.1007/BF01408380

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  • DOI: https://doi.org/10.1007/BF01408380

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