MANY-BODY CASCADE CALCULATION FOR PHOTONUCLEAR REACTIONS

In the present work we show some results for the pion multiplicity in photon-nucleus reactions at the high energy range (0.5-1.5 GeV). We ha ve noticed that many-body cascade approach introduced here provides a strong change in the pion multiplicity and in the excitation energy of the residual nuclei, as compared with the conventional one-body casca de results for photonuclear reactions. These are the relevant ingredie nts to the initial configuration of the compound nucleus in the evapor ation phase of the reaction. We expect that future experimental data u sing monochromatic beams in the high energy range will be able to disc ern the most appropriate model to treat the rapid phase of the photonu clear reaction. (C) 1997 Published by Elsevier Science B.V.