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The European Physical Journal A

, Volume 31, Issue 1, pp 15–22 | Cite as

Do we understand the electric quadrupole strength distributions in magic nuclei?

  • J. EndersEmail author
  • O. Karg
  • P. von Neumann-Cosel
  • V. Yu. Ponomarev
Regular Article - Nuclear Structure and Reactions

Abstract.

A comparison between the electric quadrupole (E2) strength distributions in 40, 48Ca with new results from 52Cr is presented. The deduced E2 strength distributions and the exhaustion of the isoscalar energy-weighted E2 sum rule are very different. Microscopic approaches fail to reproduce these differences. A survey of the available data shows that the exhaustion of the energy-weighted isoscalar E2 sum rule in doubly magic nuclei below the isoscalar giant quadrupole resonance is typically more than two times larger than in semi-magic nuclei. On the other hand, the E2 strength in this energy region exhausts about 50% of the total E2 strength, independent from shell closures.

PACS.

21.10.-k Properties of nuclei; nuclear energy levels 21.60.-n Nuclear structure models and methods 25.20.Dc Photon absorption and scattering 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  • J. Enders
    • 1
    Email author
  • O. Karg
    • 1
  • P. von Neumann-Cosel
    • 1
  • V. Yu. Ponomarev
    • 1
  1. 1.Institut für KernphysikTechnische Universität DarmstadtDarmstadtGermany

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