Micro Data Of The Protons And ~ (181) Ta Nuclear Reaction Theory Calculation

There still exists some problom in the nuclear system for commercial use which cumbered the progress of the practical applications of the fisson energy,such as the problem of final disposal of the long-life,high radioactive nuclear waste materials.The thesis is one part of the physical and technological researches of Accelerator Driven clean nuclear power System (ADS) supported by China Ministry of Science and Technology under contract G1999022603. The contract is divided into three subcontracts. This work belongs to No.03, which is mainly about the study of theory and the calculation of microscope reaction data for neutron and proton induced reactions, especially in the theoretical methods and microscope nuclear reaction data of media-high energy proton reactions on the heavy metals.In this chapter, the theory of medial-high nuclear reaction is firstly studied and then a theoretical calculation method is presented. The proton reaction data on target nuclei up to 250 MeV are needed in the designing for target of Chinese ADS. Along with the induced energy increasing, the reaction mechanisms become more complex and the opened reaction channels increase rapidly. The optical model, exciton model, direct reaction, intra-nuclear cascade theories are improved and extended to deal with the medial-high energy nuclear reactions. Calculations show that the preequilibrium mechanism change into more important in the medial-high energy reactions, so the exciton model theory has been improved. The exciton states densities, the speed of particle emission spectrum in exciton model have been developed to fit the medial-high energy reactions and in the same time the pickup mechanism has been considered.In this work, we describe the different phases of nuclear reation based on the optical model, exciton model and the pickup mechanism and gained a group of optical potential parameters, we predict the reation section and elastic scattering angular distribution of p+¹⁸¹Ta which the incidented energy less than 200Mev, at the same time, we calculate and analyze long-life radioactive section, multiplicities for emission neutron , part of section of discrete levels and energy spectrum.