| Based on the viewpoint of nucleus cluster structure, there are manytheoretical researches about the medium-energy proton-nucleus scattering inrecent years, the results are in good agreement with the experimental data.In this paper, the 12C transition density and P-12C inelastic scatteringdifferential cross section are studied on the basis ofα-particle model.In terms of the viewpoint ofα-particle, the P-12C inelastic scatteringdifferential is studied within the multi-scattering theory of K.M.T. Theα-particle transition density in the 12C nucleus is obtained by the wavefunctionof the ground state and excited state in theα-particle structuremodel. The wave-function can be separated into radial part and spherehumorouspart, and the radial part can be expanded according to the radialresonance wave-functions. The radial part of each excited state wave-functionis expanded in two or three term radial resonance wave-functions whoseparameters are decided by fitting to 12C transition-shape-factor electronscattering experimental data. In this way, the 12C transition densities aredifferent corresponding different excited state wave-functions. In addition,the P-12C optical potential is obtained within the multi-scattering theory ofK.M.T using the p-αamplitudes as the basic input and the form factordescribing theα-particle distribution in the 12C nucleus fitted withexperimental data on the base of independentα-particle model of nucleus. Atthe same time, the formula of P-12C inelastic scattering differential crosssection is deduced in the theory of K.M.T and the distorted wave impulseapproximation (DWIA). The P-12C inelastic scattering differential crosssection for the 2+ (4.43MeV) sate and 3- (9.64MeV) sate of 12C is calculatedin the incidence energy of TP=200,400,600,700,800,1040MeV by applying theoptical potential and transition density. Compared with the theory, the aboveresults show that the diffractive pattern of the P-12C inelastic scatteringdifferential cross section relates to the incidence energy of proton,... |
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