Polarization And Cross-Section For Proton-～(12)C, ～(16)O Elastic Scattering In The α-Particales Structure

Generally, we discuss the inner frame of nucleus by means of scattering. The proton-nucleusscattering is usually handled in the traditional approach from the viewpoint of nucleon. But inmany researches it is also dealt with based on the idea of cluster, these researches have achievedgreat success in their results, which are in concordance with the experimental data. In terms of the viewpoint of α particle, the principle formula of P ?α amplitudes thatconsiders the spin effect and the multi-scattering theory of K.M.T., this paper deducesP?12C,16O spin-dependent and spin-independent optical potential and applies it in the researchof elastic scattering. In P?12C,16O elastic scattering, we adopt the method partial waves todeduce the formula of scattering amplitude, use Fortran compiling program to calculate phaseshifts, and then calculate elastic differential cross sections and polarization of P?12C at theproton energies of TP = 200,400,600,700,800,1000Mev and P?16O at the proton energiesof TP = 200,800,1000 Mev. Compared with the experimental data, all the calculations provethat diffractive pattern is related to the proton energies. Meanwhile, the variation tendency of thecross sections is all shown. The calculations are in agreement with the experimental data. Thevalue of the cross sections and the positions of minimum and maximum are well predicted. Forpolarization, the calculations are in agreement with the experimental data in forward angles andapproximately reflect the variation tendency. III广西师范大学硕士研究生学位论文……Abstract Elastic differential cross sections and polarization of P?12C at the proton energy ofTP = 40Mev is discussed in the second part of the paper. Firstly, we gained the parameterformula of P ?α amplitudes at the low proton energy by least-squares fit. Then we calculateP?12C elastic scattering by imitating the first part of the middle and middle-high energy. Lastly,via comparing with the experimental data, we made some discussion. Above all, compared with the experimental dates, we gain our ends that check up the innerframe of nucleus by means of scattering.