Photoabsorption on nuclei

Jul, 1996
26 pages
Published in:
  • Nucl.Phys.A 613 (1997) 353-370
e-Print:
Report number:
  • UGI-96-13

Citations per year

1996200320102017202302468
Abstract:
We calculate the total photoabsorption cross section on nuclei in the energy range from 300 MeV to 1 GeV within the framework of a semi-classical phase space model. Besides medium modifications like Fermi motion and Pauli blocking we focus on the collision broadening of the involved resonances. The resonance contributions to the elementary cross section are fixed by fits to partial wave amplitudes of pion photoproduction. The cross sections for NRNNN \, R \to N \, N, needed for the calculation of collision broadening, are obtained by detailed balance from a fit to NNNNπN \, N \to N \, N \, \pi cross sections. We show that a reasonable collision broadening is not able to explain the experimentally observed disappearance of the D13(1520)D_{13}(1520)-resonance in the photoabsorption cross section on nuclei.
Note:
  • 26 pages Latex including 9 postscript figures Report-no: UGI-96-13
  • 25.20.-x
  • Total photonuclear cross section
  • Collision broadening
  • photon nucleus: interaction
  • interaction: photon nucleus
  • photon nucleon: interaction
  • interaction: photon nucleon
  • photon: absorption
  • absorption: photon
  • cross section: energy dependence