Isospin properties of electric dipole excitations in 48 Ca


Journal Article

Two different experimental approaches were combined to study the electric dipole strength in the doubly-magic nucleus 48Ca below the neutron threshold. Real-photon scattering experiments using bremsstrahlung up to 9.9 MeV and nearly mono-energetic linearly polarized photons with energies between 6.6 and 9.51 MeV provided strength distribution and parities, and an (α, α 'γ) experiment at Eα = 136 MeV gave cross sections for an isoscalar probe. The unexpected difference observed in the dipole response is compared to calculations using the first-order random-phase approximation and points to an energy-dependent isospin character. A strong isoscalar state at 7.6 MeV was identified for the first time supporting a recent theoretical prediction. © 2014 The Authors.

Full Text

Duke Authors

Cited Authors

  • Derya, V; Savran, D; Endres, J; Harakeh, MN; Hergert, H; Kelley, JH; Papakonstantinou, P; Pietralla, N; Ponomarev, VY; Roth, R; Rusev, G; Tonchev, AP; Tornow, W; Wörtche, HJ; Zilges, A

Published Date

  • March 7, 2014

Published In

Volume / Issue

  • 730 /

Start / End Page

  • 288 - 292

International Standard Serial Number (ISSN)

  • 0370-2693

Digital Object Identifier (DOI)

  • 10.1016/j.physletb.2014.01.050

Citation Source

  • Scopus