Dipole Resonances of $^{76}$Ge

ORAL

Abstract

Dipole resonances in $^{76}$Ge have been studied using the method of Nuclear Resonance Fluorescence (NRF). The experiment was performed using the Free Electron Laser facility at HI$\gamma$S/TUNL, which produced linearly polarised quasi-monoenergetic photons in the 4-9 MeV energy range. Photon strength, in particular dipole strength, is an important ingredient in nuclear reaction calculations, and recent interest in its study has been stimulated by observations of a pygmy dipole resonance near the neutron separation energy $S_n$ of certain nuclei. Furthermore, $^{76}$Ge is a candidate for $0\nu2\beta$-decay. The results are complimentary to a relevant experiment done at TU Darmstadt using Bremsstrahlung beams. Single-resonance parities and a preliminary estimate of the total photo-excitation cross section will be presented.

*This work was supported by the U.S. DOE under grant no. DE-FG02-91ER40609.

Authors

  • R.S. Ilieva

    • Yale University, University of Surrey
  • N. Cooper

    • Yale University
  • V. Werner

    • Yale University
  • G. Rusev

    • TUNL, Los Alamos National Laboratory
  • N. Pietralla

    • TU Darmstadt
  • J.H. Kelly

    • TUNL
  • W. Tornow

    • TUNL
  • S.W. Yates

    • University of Kentucky
  • B.P. Crider

    • University of Kentucky
  • E. Peters

    • University of Kentucky