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E2 transition probabilities in the decoupled band of the 129La nucleus

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Abstract

Lifetimes of the yrast levels with spins I π = 23/2− to 39/2− in 129La produced via the 120Sn(14N, 5n) reaction at a beam energy of 77MeV have been measured by the Doppler shift attenuation method. The properties of the studied levels belonging to the πh11/2 band were compared with the theoretical predictions obtained in the framework of the core quasi-particle coupling model. It is suggested that the rigid-rotor model used to describe the cores is too simplified as the even-even nuclei from the A ∼ 130 region are susceptible to shape deformation. Reasonable agreement was obtained with the phenomenological cores based on the experimental data of 128Ba.

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Authors and Affiliations

  1. Nuclear Physics Division, IEP, University of Warsaw, Hoża 69, 00-681, Warsaw, Poland

    I. Sankowska, Ch. Droste, E. Grodner, T. Morek & M. Kowalczyk

  2. Heavy Ion Laboratory, University of Warsaw, Pasteura 5a, 02-093, Warsaw, Poland

    J. Srebrny, J. Kownacki, P. Napiorkowski, M. Kowalczyk & M. Kisieliński

  3. Cyclotron Laboratory, A.F. Ioffe Physical Technical Institute, 194021, St.-Petersburg, Russia

    A. A. Pasternak

  4. Institute of Theoretical Physics, University of Warsaw, Hoża 69, 00-681, Warsaw, Poland

    S. G. Rohoziński

  5. The A. Sołtan Institute for Nuclear Studies, 05-400, Świerk, Poland

    M. Kisieliński, R. Kaczarowski & E. Ruchowska

Authors
  1. I. Sankowska
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  2. Ch. Droste
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  3. E. Grodner
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  4. T. Morek
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  5. J. Srebrny
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  6. A. A. Pasternak
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  7. J. Kownacki
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  8. P. Napiorkowski
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  9. S. G. Rohoziński
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  10. M. Kowalczyk
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  11. M. Kisieliński
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  12. R. Kaczarowski
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  13. E. Ruchowska
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Corresponding author

Correspondence to I. Sankowska.

Additional information

Communicated by J. Äystö

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Sankowska, I., Droste, C., Grodner, E. et al. E2 transition probabilities in the decoupled band of the 129La nucleus. Eur. Phys. J. A 37, 169–175 (2008). https://doi.org/10.1140/epja/i2008-10621-7

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  • DOI: https://doi.org/10.1140/epja/i2008-10621-7

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