1996/07/03 by M. Effenberger, A. Hombach, S. Teis +1 · 2 citations
Physics and Astronomy · #Advanced Chemical Physics Studies #Atomic and Molecular Physics #Nuclear physics research studies #nucl-th
paper · pdf · doi:10.1016/s0375-9474(96)00408-3
published as Nucl.Phys. A613 (1997) 353-370 · 26 pages Latex including 9 postscript figures
arxiv created 1996/07/03 · openalex publication_date 1997/02/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 N R → N N, needed for the calculation of collision broadening, are obtained by detailed balance from a fit to N N → N N π cross sections. We show that a reasonable collision broadening is not able to explain the experimentally observed disappearance of the D13(1520)-resonance in the photoabsorption cross section on nuclei.