Elsevier

Nuclear Physics A

Volume 179, Issue 2, 31 January 1972, Pages 417-447
Nuclear Physics A

The decay of 129Ba

https://doi.org/10.1016/0375-9474(72)90381-8Get rights and content

Abstract

The decay of 129Ba has been investigated with Ge(Li) and scintillation detectors used in both singles and coincidence modes. A total of 118 γ-rays are assigned to the decay of this isotope. Precise energies and intensities have been determined and are compared with internal conversion measurements. A decay scheme incorporating 100 γ-transitions is proposed on the basis of coincidence experiments and energy sums. The multipolarities of low-energy transitions up to 221 keV are calculated from a knowledge of the K- and L-con version electron intensities and our γ-ray intensities. Spins for the first few levels in 129Cs are suggested on the basis of gB-decay characteristics and the multipolarities of the low-energy transitions. The low spin state of 129Ba decays to the 12+ ground state and to the 135 and 221 keV levels of 129Cs with a large positon branching, whereas no positon decay has been observed from the high-spin state of 129Ba.

References (15)

  • D. Strominger et al.

    Rev. Mod. Phys.

    (1958)
  • C.C. Thomas et al.

    J. Am. Chem. Soc.

    (1950)
  • R.W. Fink et al.

    J. Am. Chem. Soc.

    (1950)
  • R.W. Fink et al.

    Phys. Rev.

    (1953)
  • W. Henkes

    Phys. Rev.

    (1959)
  • E. Arbmann et al.

    Nucl. Phys.

    (1961)
  • A.C. Li et al.

    Phys. Rev.

    (1966)
There are more references available in the full text version of this article.

Cited by (15)

  • Nuclear Data Sheets for A = 129

    2014, Nuclear Data Sheets
  • Nuclear data sheets for A=129

    1996, Nuclear Data Sheets
  • Nuclear Data Sheets for A = 129

    1983, Nuclear Data Sheets
View all citing articles on Scopus
View full text