Abstract
The intranuclear cascade model is used to study the energy deposit in the nucleon system by cascading pions issued from p- annihilation . The emphasis is put on the correlation between the participant nucleons (number, energy,…) and the parameters of the annihilation (location, number of pions,…). Annihilations both at rest and in flight (in the LEAR domain) are studied. The relation of the cascade output to the mass distribution of the residues is investigated and shown to be ambiguous. Simple procedures are used in the cases of 98Mo (at rest) and 20Ne and the results are compared with experimental data. It seems that not enough energy is transferred from the multipion system to the nucleon system in the cascade model. The relationship between the intranuclear cascade model and the current percolation models for nuclear fragmentation is discussed. It is suggested that p- annihilations on nuclei are suited to study these models and typical features like the critical percolation threshold and multifragmentation.
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