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Structure of 231Ac: Measurements of level half-lives

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Abstract.

There is lack of knowledge of the structure of the 231Ac nucleus located in the upper border of the island of octupole deformation centered around A = 225. We have populated the excited states in 231Ac by beta-decay from the parent 231Ra produced at ISOLDE, CERN. The low-energy structure of 231Ac has been investigated by means of γ, conversion electrons, γ-γ and γ-e- spectroscopy. We report here in the precise determination in 231Ac of the half-life of the most intensively populated states by the Advanced Time Delayed ββγ(t) technique.

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Authors and Affiliations

  1. Instituto de Estructura de la Materia, CSIC, Serrano 113 bis, 28006, Madrid, Spain

    R. Boutami, M. J.G. Borge, L. M. Fraile & O. Tengblad

  2. Dept. of Radiation Sciences, ISV, Ångström laboratory, Lägerhyddsvagen 1, P.O. Box 535, 751 21, Uppsala, Sweden

    H. Mach

  3. EP Division, CERN, 1211, Geneva 23, Switzerland

    L. M. Fraile

  4. Dept. of Physics, University of Warsaw, 00 681, Warsaw, Poland

    K. Gulda & W. Kurcewicz

  5. Dept. of Chemistry and Physics, University of Oslo, P.O. Box 1033, 0315, Oslo, Norway

    A. J. Aas, E. Hagebø & G. Løvhøiden

  6. Instituto de Física Corpuscular, CSIC-University of Valencia, 46100, Burjassot, Spain

    L. M. García-Raffi, T. Martínez, B. Rubio & J. L. Taín

Authors
  1. R. Boutami
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  2. M. J.G. Borge
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  3. H. Mach
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  4. L. M. Fraile
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  5. K. Gulda
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  6. A. J. Aas
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  7. L. M. García-Raffi
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  8. E. Hagebø
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  9. W. Kurcewicz
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  10. G. Løvhøiden
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  11. T. Martínez
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  12. B. Rubio
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  13. J. L. Taín
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  14. O. Tengblad
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Boutami, R., Borge, M., Mach, H. et al. Structure of 231Ac: Measurements of level half-lives. Eur. Phys. J. Spec. Top. 150, 87–88 (2007). https://doi.org/10.1140/epjst/e2007-00273-9

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  • DOI: https://doi.org/10.1140/epjst/e2007-00273-9

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