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Hybridized bands and parity splitting in the odd-odd nucleus220Ac

  • Nuclear Structure and Reactions
  • Published:
Zeitschrift für Physik A Hadrons and Nuclei

Abstract

The high spin state structure of the nucleus220Ac was investigated by means of the209Bi(14C, 3n) reaction. In beamγ ray spectroscopy was carried out using the Château de Cristal multidetector array. Gamma ray multipolarities were established by extracting directional correlation ratios from the Ge—Ge coincidence data and by intensity balance considerations. The level scheme, established up to 18 ħ above the lowest observed state, consists of three alternating parity bands. The data are interpreted in terms of the reflection asymmetric shapes of the nucleus. The analysis of the parity doublet candidates does not show the decrease of the parity splitting predicted for an odd-odd nucleus.

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Author information

Authors and Affiliations

  1. Centre de Recherches Nucléaires, IN2P3-CNRS/Université Louis Pasteur, B.P. 20, F-67037, Strasbourg, France

    N. Schulz, V. R. Vanin, A. J. Kreiner, M. Aïche, A. Chevallier, J. Chevallier & J. C. Sens

  2. Institute de Fisica da Universidade de Sao Paulo, Brazil

    V. R. Vanin

  3. Departemento de Fisica Comision Nacional de Energia Atomica, Buenos Aires, Argentina

    A. J. Kreiner & M. E. Debray

  4. Institute of Experimental Physics, Warsaw University, Poland

    E. Ruchowska

  5. Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, Orsay, France

    E. Ruchowska & Ch. Briançon

Authors
  1. N. Schulz
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  2. V. R. Vanin
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  3. A. J. Kreiner
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  4. E. Ruchowska
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  5. M. Aïche
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  6. Ch. Briançon
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  7. A. Chevallier
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  8. J. Chevallier
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  9. M. E. Debray
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  10. J. C. Sens
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Additional information

The authors thank J. Dudek for discussions about the theoretical aspect concerning this work. They gratefully acknowledge the crew of the Strasbourg M.P. tandem for providing a good quality14C beam and the Château de Cristal group for excellent operation conditions. This work was partially supported by Fundacao de Amparo e Pesquisa do Estado de Sao Paulo (FAPESP), Brazil, by the French (IN2P3)-Polish Laboratories collaboration agreement, by the Polish Ministry of National Education under the contract No CPBP 01.06.13.01. and by the French and Argentinian Foreign Offices.

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Schulz, N., Vanin, V.R., Kreiner, A.J. et al. Hybridized bands and parity splitting in the odd-odd nucleus220Ac. Z. Physik A - Hadrons and Nuclei 339, 325–334 (1991). https://doi.org/10.1007/BF01560633

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  • DOI: https://doi.org/10.1007/BF01560633

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