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Decay of 129Ce to low-lying positive-parity states in 129La

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Zeitschrift für Physik A Hadrons and Nuclei

Abstract

Low-lying levels of the 129La isotope have been investigated through the β+/EC decay of 129Ce. The radioactive nuclei were produced in the 94Mo+40Ca reaction at a bombarding energy of 255 MeV and transported with a He-jet system. On-line mass separation was used to select the 129Ce beta-decay γ-γ-t, X- γ- t, e−-γ -t coincidence measurements as well as time multi-analysis were performed. Internal conversion electrons were recorded with a magnetic selector and multipolarities deduced. The level scheme of 129La is discussed and compared with the calculations made in the frame of the neutron-proton Interacting Boson-Fermion Model (IBFM-2).

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Author information

Author notes

  1. B. Weiss

    Present address: Laboratoire de Radiochimie, Université de Nice, F-06108, Nice Cedex, France

  2. T. von Egidy

    Present address: Physik Department, Technische Universität München, D-85748, Garching, Germany

Authors and Affiliations

  1. Institut des Sciences Nucléaires, IN2P3-CNRS/Université Joseph Fourier, F-38026, Grenoble-Cedex, France

    A. Gizon, J. Genevey, B. Weiss, Gh. Căta-Danil, J. Gizon, D. Barnéoud, D. Bucurescu & T. von Egidy

  2. Institute of Atomic Physics, P.O.Box MG-6, RO-76900, Bucharest, Romania

    Gh. Căta-Danil & D. Bucurescu

  3. Institut de Physique Nucléaire, IN2P3-CNRS/Université Claude Bernard, F-69621, Villeurbanne-Cedex, France

    R. Béraud & A. Emsallem

  4. CSNSM, IN2P3-CNRS, Bt.104, F-91405, Campus-Orsay, France

    C. F. Liang & P. Paris

  5. Institute for Nuclear Research and Nuclear Energy, BG-1784, Sofia, Bulgaria

    I. Penev

  6. Institute of Experimental Physics, P-00-681, Warsaw, Poland

    A. Plochocki

Authors
  1. A. Gizon
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  2. J. Genevey
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  4. Gh. Căta-Danil
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  5. J. Gizon
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  6. D. Barnéoud
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  8. D. Bucurescu
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  9. T. von Egidy
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  10. A. Emsallem
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  11. C. F. Liang
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Gizon, A., Genevey, J., Weiss, B. et al. Decay of 129Ce to low-lying positive-parity states in 129La. Z Phys A - Particles and Fields 359, 11–17 (1997). https://doi.org/10.1007/s002180050360

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  • DOI: https://doi.org/10.1007/s002180050360

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