Density dependence of resonance broadening and shadowing effects in nuclear photoabsorption


Medium effects as a function of the mass number AA are studied in the total photonuclear cross section from the Δ\Delta-resonance region up to the region where shadowing effects are known to exist. A consistent picture is obtained by simply assuming a density dependence of the different mechanisms of resonance broadening and shadowing. The Δ\Delta-mass shift is found to increase with AA.Comment: 7 pages, LaTeX, 2 figures available from the author

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