Multi-step Direct Nuclear Reactions Semiclassical Distorted Wave Model

Making use of the Wigner transform of the one-body density matrix, the coherent density fluctuation model(CDFM) is introduced into semiclassical distorted wave(SCDW) model. The new model is applied to the analyses of multistep direct processes of (p,p'x) reactions to continuum. The calculated double differential cross section of the new model is compared with experimental data and previous SCDW calculations with single particle model. The calculated cross sections are larger than those given by previous calculations at backword and forward angles and smaller than those given by previous calculations near the quasi-elastic scattering(QES) angle. The agreement with experimental data is much improved. The study of the effect of the momentun distribution of target nucleons on the SCDW calculation is performed, which shows that the larger nucleon momentum compenents affect the double differential cross sections at backward and forward angles, while smaller nucleon momentum compenents affect the cross sections near the QES angle. The invesgation on applicability of new model to wider ranges of target mass number and incident energy is also carried out.