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Properties of 152 Gd collective states

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Abstract.

The decays of 152Tb (T 1/2 = 17.5 h) and 152Gd excited states have been investigated by the analysis of \(\gamma\)-rays and \(\gamma\gamma\)-coincidences measured with the use of high-resolution HPGe detectors. The source of 152Tb was prepared by chromatographic isolation followed by electromagnetic separation from a tantalum target irradiated by an internal proton beam of the LNP JINR phasotron. New and more precise data on the \(\gamma\)-transitions and excited states of 152Gd are reported. Using previously published data on internal-conversion electrons many transition multipolarities are suggested, some of them with E0 admixture. The \({\rm EC}/\beta^ + \) ratio was found for a number of low-lying levels, for most of the levels their spins, parities, and \(\log ft\) are given. The excited levels of 152Gd were deduced from the analysis of \(\gamma\gamma\)-coincidences. The experimental level energies and reduced transition probabilities are compared with the calculations by phenomenological formulae as well as in the frameworks of theoretical models.

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Authors and Affiliations

  1. Joint Institute for Nuclear Research, Dubna, Russia

    J. Adam, V. G. Kalinnikov, V. S. Pronskikh, P. Čaloun, N. A. Lebedev, V. I. Stegailov & V. M. Tsoupko-Sitnikov

  2. Nuclear Physics Institute ASCR, CZ-25068, Řež, Czech Republic

    J. Dobeš, M. Honusek & J. Mrázek

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  1. J. Adam
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  2. J. Dobeš
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  3. M. Honusek
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  4. V. G. Kalinnikov
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  6. V. S. Pronskikh
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  7. P. Čaloun
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  8. N. A. Lebedev
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  9. V. I. Stegailov
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  10. V. M. Tsoupko-Sitnikov
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Correspondence to V. S. Pronskikh.

Additional information

Communicated by D. Schwalm

Received: 21 May 2002, Revised: 26 May 2003, Published online: 18 November 2003

PACS:

29.30.Kv X- and gamma-ray spectroscopy - 23.20.-g Electromagnetic transitions - 21.10.-k Properties of nuclei; nuclear energy levels - 21.60.-n Nuclear structure models and methods

J. Adam: On leave from Nuclear Physics Institute of ASCR, Řež, Czech Republic.

V.S. Pronskikh: On leave from Saint Petersburg State Institute of Technology, Russia

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Adam, J., Dobeš, J., Honusek, M. et al. Properties of 152 Gd collective states. Eur. Phys. J. A 18, 605–626 (2003). https://doi.org/10.1140/epja/i2002-10167-8

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