Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1999-05-13
Phys.Rept. 323 (2000) 457-594; Phys.Rept. 323 (2000) 595
Physics
Nuclear Physics
Nuclear Theory
146 pages, 37 figures, submitted to Phys. Reports
Scientific paper
10.1016/S0370-1573(99)00041-1
The concept of Compton scattering by even-even nuclei from giant-resonance to nucleon-resonance energies and the status of experimental and theoretical researches in this field are outlined. Nuclear Compton scattering in the giant-resonance energy-region provides information on the dynamical properties of the in-medium mass of the nucleon. The electromagnetic polarizabilities of the nucleon in the nuclear medium can be extracted from nuclear Compton scattering data obtained in the quasi-deuteron energy-region. Recent results are presented for two-body effects due to the mesonic seagull amplitude and due to the excitation of nucleon internal degrees of freedom accompanied by meson exchanges. Due to these studies the in-medium electromagnetic polarizabilities are by now well understood, whereas the understanding of nuclear Compton scattering in the Delta-resonance range is only at the beginning. Phenomenological methods how to include retardation effects in the scattering amplitude are discussed and compared with model predictions.
Huett M.-Th.
L'vov A. I.
Milstein Alexander I.
Schumacher Martin
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