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Particle plus octupoleM2/E3 isomers and high-spin particle-hole states in147Tb and148Tb

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

The level structures of theN=82 andN=83 nuclei147Tb and148Tb have been studied by means of (α, 8n) and (α,7n) reactions induced by 68 to 110 MeVα particle bombardments of151Eu targets. In-beam conversion electron measurements have established that isomers withT 1/2=4.8(6)ns in147Tb andT 1/2=22(1)ns in148Tb decay byM2+E3 transitions to the ground states. The measuredB(E3) values show that the isomeric states arise from the coupling of the valence nucleon(s) to the146Gd core octupole. Particlephonon coupling in these nuclei and in the one-neutron nucleus147Gd is discussed and compared with well known cases involving the208Pb core. The higher lying yrast states in the two Tb nuclei are described as shell-model particle-hole excitations using empirical single particle energies and nucleon-nucleon interactions.

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Authors and Affiliations

  1. Institut für Kernphysik, Kernforschungsanlage Jülich, Jülich, F.R. Germany

    R. Broda, M. Behar, P. Kleinheinz & P. J. Daly

  2. Chemistry Department, Purdue University, W. Lafayette, Ind., USA

    P. J. Daly

  3. Research Institute of Physics, Stockholm, Sweden

    J. Blomqvist

Authors
  1. R. Broda
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  2. M. Behar
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  3. P. Kleinheinz
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  4. P. J. Daly
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  5. J. Blomqvist
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Additional information

On leave from Institute of Nuclear Physics, Cracow, Poland

Alexander von Humboldt fellow 1978, on leave from Universidade Federal do Rio Grande do Sul, Porto Allegre, Brazil

We thank D. Haenni and H. Beuscher for their expert assistance in the conversion electron measurements, and M. Ogawa, S. Lunardi and P. Wieder who also contributed appreciably to this study. We warmly acknowledge valuable and productive discussions with S. Harris and O. Schult.

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Broda, R., Behar, M., Kleinheinz, P. et al. Particle plus octupoleM2/E3 isomers and high-spin particle-hole states in147Tb and148Tb. Z Physik A 293, 135–149 (1979). https://doi.org/10.1007/BF01559755

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  • DOI: https://doi.org/10.1007/BF01559755

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