Elsevier

Nuclear Physics A

Volume 208, Issue 2, 2 July 1973, Pages 417-428
Nuclear Physics A

Isomeric E1 and M1 transitions in 177Ta and in neighbouring odd-A Lu and Ta isotopes

https://doi.org/10.1016/0375-9474(73)90385-0Get rights and content

Abstract

Delayed γ-ray spectra as well as time distributions have been measured applying the r.f.-γ method and the method of delayed γ-γ coincidences. Using the reaction 175Lu(α, 2n)177Ta, the half-lives of the levels at 70.6 and 73.6 keV in 177Ta have been determined as T12 = 80±10 ns and T12 = 370±50 ns, respectively. In further experiments, upper limits for the lifetimes of the 92 [514] and 52+ [402] states in 171Lu and 173Lu were estimated. Comparisons of the experimental half-lives to Weisskopf and Nilsson model predictions are performed taking into account pairing correlations. For the calculations, a modified Nilsson Hamiltonian has been used. The hindrance factors obtained are summarized together with those deduced for corresponding transitions in neighbouring odd-proton nuclei. From the experimental results in 177Ta, conclusions have been drawn on the possible value of the constant k2 occurring in the magnetic dipole operator.

References (34)

  • E. Nadjakov et al.

    Compt. Rend. Acad. Bulg. Sci.

    (1969)
  • K.E.G. Löbner et al.

    Nucl. Phys.

    (1966)
  • S. Wahlborn et al.

    Nucl. Phys.

    (1969)
  • W. Andrejtscheff et al.

    Nucl. Phys.

    (1972)
  • P. Kemnitz et al.

    Annual report

    (1971)
  • H. Rotter et al.

    Annual report

    (1971)
    H. Rotter et al.

    Nucl. Instr.

    (1972)
  • F. Gabriel

    report

    (1972)
  • P. Kemnitz et al.

    Annual report

    (1971)
  • P. Kemnitz, private communication,...
  • G. Winter

    Annual report

    (1971)
  • C. Gustafson et al.

    Ark. Fys.

    (1967)
  • K.E.G. Löbner

    Phys. Lett.

    (1968)
  • K.H. Johansen et al.

    Nucl. Phys.

    (1969)
  • P. Manfrass et al.

    Nucl. Phys.

    (1972)
  • P. Manfrass et al.

    Annual report

    (1972)
  • J. Konijn et al.

    Nucl. Phys.

    (1969)
  • B. L. Ader and N. N. Perrin, preprint,...B.L. Ader

    Nucl. Phys.

    (1972)
    B. Ader et al.

    Compt. Rend.

    (1972)
  • Cited by (23)

    • Nuclear data sheets for A = 177

      2003, Nuclear Data Sheets
    • Nuclear data sheets for A = 171

      2002, Nuclear Data Sheets
    • Nuclear data sheets for A = 173

      1988, Nuclear Data Sheets
    • Nuclear Data Sheets for A=171

      1984, Nuclear Data Sheets
    View all citing articles on Scopus

    Preliminary results presented in the Annual report ZfK-223 (1971) 59 and at the Symposium on High-Spin Nuclear States and Related Phenomena, Stockholm, May 1972.

    View full text