Study on JQMD and INCL models for α particle incident neutron production

An experiment of neutron production thick target yields from 7.2 MeV/u α incidence on ²⁰⁹Bi was performed. The measured data was compared with both Liege IntraNuclear Cascade (INCL) and JAERI Quantum Molecular Dynamics (JQMD) models. The comparison suggested that INCL agreed with the measured data better than JQMD. We investigated the reason that the prediction ability of both models came from. As a result of the study, the prediction ability of the INCL model seemed to be originated from the process of 'Local E procedure'. For the JQMD calculation, the modification of the mean-field approximation could be a key to improve the prediction capacity. (author)