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Beta decay of 125Sb and level structures in 125Te

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Abstract

The decay of 2.76y 125Sb to levels of 125Te has been studied using an HPGe detector for gamma-ray and a mini orange electron spectrometer for conversion electron measurements. We identify 38 transitions in this decay, including 13 gamma rays and 4 conversion electron lines being reported for the first time. New results also include E1 multipolarity assignments to 3 newly observed transitions and M-shell conversion coefficient for the 109 keV M4 transition. A revised 125Te level scheme is constructed using Ritz combination principle. While confirming the existence of 10 well established levels below 700 keV excitation, we introduce 3 other levels at 402.0, 538.6 and 652.9 keV. Interpretation of the observed levels in terms of various theoretical approaches is briefly discussed. The newly introduced 538.6 keV (1/2+) and 652.9 keV (3/2+) levels are seen as the two missing members of the (s 1/2 ⊗ 2+) and (d 3/2 ⊗ 2+) sextuplet in the quasiparticle-phonon coupling scheme.

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Authors and Affiliations

  1. Department of Physics, Sri Sathya Sai Institute of Higher Learning, 515 134, Prashanthinilayam, India

    M Sainath, K Venkataramaniah & P C Sood

  2. Department of Physics, Banaras Hindu University, 221 005, Varanasi, India

    P C Sood

Authors
  1. M Sainath
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  2. K Venkataramaniah
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  3. P C Sood
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Sainath, M., Venkataramaniah, K. & Sood, P.C. Beta decay of 125Sb and level structures in 125Te. Pramana - J Phys 53, 289–305 (1999). https://doi.org/10.1007/s12043-999-0129-1

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  • DOI: https://doi.org/10.1007/s12043-999-0129-1

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