Elsevier

Nuclear Physics A

Volume 220, Issue 2, 25 February 1974, Pages 317-334
Nuclear Physics A

Investigation of 38Ar levels by 37Cl+p reactions: (II). Lifetimes, spins, parities and theory

https://doi.org/10.1016/0375-9474(74)90722-2Get rights and content

Abstract

The mean lives of 16 bound states of 38Ar have been determined from DSA measurements at 14 selected 37Cl(p, γ)38 Ar resonances in the range Ep = 0.9–1.5 MeV. Spins and parities of 20 (p, γ) resonances have been determined from a precision comparison with corresponding 37Cl(p, α0)34S resonances. Gamma-ray transition strengths combined with γ-ray angular distribution measurements at two resonances determine (or limit) the spins of 15 bound states of 38Ar.

The experimental data on 38Ar are compared with the results from shell-model calculations. The negative-parity states, especially those with high spin, can be very well described in terms of a model with five active nucleons in the 1d32 shell and one in either the 1f72 or 2p32 shell. For the positive-parity states, the new data underline the importance of two-particle four-hole excitations.

References (24)

  • C. Alderliesten et al.

    Nucl. Phys.

    (1974)
  • B. Bošnjakovic et al.

    Nucl. Phys.

    (1967)
  • G.A.P. Engelbertink et al.

    Nucl. Phys.

    (1969)
  • W.S. Gray

    Nucl. Phys.

    (1970)
  • L.D. Skouras

    Phys. Lett.

    (1970)
  • A.E. Blaugrund

    Nucl. Phys.

    (1966)
  • G.A.P. Engelbertink et al.

    Nucl. Phys.

    (1969)
  • G.A.P. Engelbertink et al.

    Nucl. Phys.

    (1968)
  • A.N. James

    Nucl. Phys.

    (1971)
  • K.P. Lieb

    Nucl. Phys.

    (1968)
  • M.A. Moinester et al.

    Nucl. Phys.

    (1970)
  • R.J. de Meijer et al.

    Nucl. Phys.

    (1970)
  • Cited by (10)

    • Nuclear Data Sheets for A = 38

      2008, Nuclear Data Sheets
    • Energy levels of A = 21-44 nuclei (VII)

      1990, Nuclear Physics, Section A
    • Short lifetimes in <sup>38</sup>Ar

      1984, Nuclear Physics, Section A
    • Level densities for 23 ≦ A ≦ 40

      1977, Nuclear Physics, Section A
    View all citing articles on Scopus
    View full text