Elsevier

Nuclear Physics A

Volume 309, Issues 1–2, 16–23 October 1978, Pages 77-105
Nuclear Physics A

Radiative decays of unbound high spin states in 24Mg: (I). Positive parity states

https://doi.org/10.1016/0375-9474(78)90536-5Get rights and content

Abstract

The 20Ne(α, γ)24Mg reaction has been used to measure radiative decay rates for known high spin levels at 12.86(6+), 13.44(6+) and 14.15(8+) MeV in 24Mg, and for previously unidentified levels at 12.00, 13.04 and 14.08 MeV. Gamma-ray angular distributions indicate that the 12.00 and 14.08 MeV levels are probably 6+ levels, while the 13.04 MeV level is the lowest 0+ T = 1 state. A new level at 11.005 MeV, populated in the radiative decay of the 14.08 MeV level, is most likely the lowest 5+ T = 1 state in 24Mg. Alpha-particle widths have also been measured for several of these levels and for the known 6+ level at 13.85 MeV using the 20Ne(α, α′γ)20Ne reaction and previously determined branching ratios. The results for both radiative and particle decay widths are compared with recent shell-model calculations performed within a full (sd)8 basis.

References (25)

  • R.R. Whitehead

    Nucl. Phys.

    (1972)
  • T.T.S. Kuo

    Nucl. Phys.

    (1967)
  • T.T.S. Kuo et al.

    Nucl. Phys.

    (1966)
  • D. Branford et al.

    Nucl. Phys.

    (1975)
  • L.K. Fifield et al.

    Phys. Letts.

    (1977)
  • F. Watt et al.

    Nucl. Instr.

    (1978)
  • M.R. Wormald et al.

    Nucl. Instr.

    (1974)
  • P.D. Ingalls

    Nucl. Phys.

    (1976)
  • L.C. Northcliffe et al.

    Nucl. Data

    (1970)
  • P.M. Endt et al.

    Nucl. Phys.

    (1973)
  • P.M. Endt et al.

    Nucl. Data

    (1974)
  • J.L.C. Ford et al.

    Nucl. Phys.

    (1974)
  • Cited by (0)

    Present address: Lawrence Berkeley Laboratory, Berkeley, California 94720, USA.

    ††

    Present address: Department of Physics, University of edinburgh, edinburgh, Scotland.

    View full text