Nuclear Photoabsorption at Photon Energies between 300 and 850 Mev

Details Nuclear Photoabsorption at Photon Energies between 300 and 850 Mev Nuclear Photoabsorption at Photon Energies between 300 and 850 Mev

2001-12-28

arxiv.org/abs/nucl-th/0112079v2

Phys.Rev. C66 (2002) 014612

Physics

Nuclear Physics

Nuclear Theory

22pages,7figures,revtex4

Scientific paper

10.1103/PhysRevC.66.014612

We construct the formula for the photonuclear total absorption cross section using the projection method and the unitarity relation. Our treatment is very effective when interference effects in the absorption processes on a nucleon are strong. The disappearance of the peak around the position of the $D_{13}$ resonance in the nuclear photoabsorption can be explained with the cooperative effect of the interference in two-pion production processes,the Fermi motion, the collision broadenings of $\Delta$ and $N^*$, and the pion distortion in the nuclear medium. The change of the interference effect by the medium plays an important role.

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