Elsevier

Nuclear Physics A

Volume 97, Issue 2, 25 April 1967, Pages 425-443
Nuclear Physics A

64Ga spin from β-γ(CP) correlation data and decay to 64Zn levels

https://doi.org/10.1016/0375-9474(67)90497-6Get rights and content

Abstract

The decay of 2.6 min 64Ga produced by the reaction 64Zn(p, n)64Ga has been studied by Ge(Li) γ-ray spectroscopy, NaI(TI) crystals both singly and in coincidence, and β-γ(CP) correlation measurements. A transmission type of polarimeter was used in the correlation measurements to give good discrimination against lower energy γ-rays. The decay was found to populate excited states in 64Zn at 991.3, 1799.2, 1909.8, 2608.5, 3186.2, 3261.7, 3365.9 3425.0, 3795.0, 4453.5 keV, and possibly 3623 keV. The decay properties of these states were generally found to agree well with the (p, p′γ) work of Van Patter and co-workers. Beta-gamma (CP) correlation measurements were made on β rays in coincidence with strong ground state γ-ray transitions from the states at 3365.9 and 3425.0 keV. The combined asymmetry parameter of −1.00±0.05 strongly favours a spin of 0 for the 64Ga ground state; a spin of 1 would be possible only if the mixing into the 64Ga ground state involves a very large Coulomb matrix element of ⪸ 344 keV. Possible explanations of the unusualy large Coulomb matrix element (35 keV) between the analogue of the 64Zn ground state and the 64Ga ground state are discussed.

References (24)

  • A.K. Sen Gupta et al.

    Nuclear Physics

    (1964)
  • W.P. Alford et al.

    Phys. Rev. Lett.

    (1961)
  • K. Glenn Tirsell et al.

    Nuclear Physics

    (1967)
  • D.C. Camp
  • R.B. Chesler

    Nucl. Instr.

    (1965)
  • M.H. Brennan et al.

    Phys. Rev.

    (1960)
  • A.F.R. de Toledo-Piza et al.

    Nuclear Physics

    (1966)
  • A.M. Lane et al.

    Nuclear Physics

    (1962)
  • J. Konijn et al.

    Nuclear Physics

    (1967)
  • B.L. Cohen

    Phys. Rev.

    (1953)
  • T.H. Jacobi et al.

    Phys. Rev.

    (1960)
  • C.E. Weller et al.

    Phys. Rev.

    (1955)
  • Cited by (17)

    • Nuclear Data Sheets for A=64

      2021, Nuclear Data Sheets
    • Nuclear Data Sheets for A = 64

      2007, Nuclear Data Sheets
    • Nuclear Data Sheets for A = 64

      1996, Nuclear Data Sheets
    • Nuclear data sheets for A = 64

      1979, Nuclear Data Sheets
    View all citing articles on Scopus

    Work performed under the auspices of the U.S. Atomic Energy Commission.

    View full text