Elsevier

Nuclear Physics A

Volume 406, Issue 3, 26 September 1983, Pages 473-492
Nuclear Physics A

High-resolution (e, e') study of isovector M1 and M2 transitions in the oxygen isotopes: (I). 16O

https://doi.org/10.1016/0375-9474(83)90371-8Get rights and content

Abstract

The M1 and M2 transition strength distribution for 16O in the excitation energy range from 16 to 20 MeV has been measured in a high-resolution electron scattering experiment. The M1 strength is concentrated in three sharp states at Ex = 16.22, 17.14 and 18.79 MeV (± 0.01 MeV) with B(M1, k)↑ = 0.20 ± 0.02, 0.32 ± 0.03 and 0.13 ± 0.03 μN2, respectively. An additional strength of 0.35 ± 0.09 μN2, distributed over eight weakly excited states with excitation energies Ex = 17.4 to 18.0 MeV, brings the total measured M1 strength to B(M1, k)↑ = 1.0 ± 0.1 μN2. The experimental M2 strength is distributed over states at Ex = 16.82, 17.78, 18.50 and 19.0 MeV (± 0.01 MeV) with B(M2, k)↑ = 19 ± 2, 13 ± 2, 59 ± 7 and 341 ± 51 μN2 · fm2, respectively. Electric transitions were also measured to states at Ex = 16.45 MeV (2+, E2), 17.30 MeV (1+, E1) and 18.20 MeV (2+, E2). Calculations were performed using the modified surface delta interaction in a 2p-2h shell model for the M1 transitions and the random phase approximation for the M2 transitions. The results show the sensitivity of the M1 strength as a measure of ground-state correlations and compare well with results from the 15N(p, γ) reaction.

References (21)

  • A. Richter

    Nucl. Phys.

    (1982)
  • W. Gross et al.

    Phys. Lett.

    (1979)
  • R. Liljestrand et al.

    Nucl. Instr.

    (1976)
  • C.W. de Jager et al.

    Atom. Nucl. Data Tables

    (1974)
  • H. Theissen

    Springer Tracts in Modern Physics

    (1972)
  • P.J. Brussaard et al.

    Shell-model applications in nuclear spectroscopy

    (1977)
  • R. Saayman et al.

    Z. Phys.

    (1974)
  • G. Mairle et al.

    Z. Phys.

    (1973)
  • G. Strassner et al.

    Phys. Rev.

    (1979)
  • D. Meuer et al.

    Nucl. Phys.

    (1980)
There are more references available in the full text version of this article.

Cited by (41)

  • Energy levels of light nuclei A = 16-17

    1993, Nuclear Physics, Section A
  • The <sup>16</sup>O(p,p′) reaction at 35 MeV

    1990, Nuclear Physics, Section A
View all citing articles on Scopus

Supported by the Deutsche Forschungsgemeinschaft.

View full text