Double-Particle Spectra About Double Closed Shell

Double-Particle spectras of Ca42 , Sc42 , Ni58 , Cu58 are calculated by means of the Green funcion method. We use the matrix elements of M-3Y force as the equivalent G-matrix elements introduced by Bertsch.In the calculation, the first, and the sencond interaction of the 3plh diagrams are taken into account, and the multiple scattering correlation introduced by Wu Shishu is also taken into account. We give the spectra equation of double particle Green Function and the process eliting it. As well as the second approximate formula of the TDA approximate diagram is also given. The harmonic oscillator potential is taken as a good approximation of the average field, so the harmonic wave function is used as the sigle paticle wave function.The spectras including the multiple scattiiig agree with the experiment fairly well, especially in the spectra of Ni58. There is an improvement in the spectra of Ni58 compared with the previous results which is obtained with the Hamada-Johnston interaction, the yale and soft-core Reid free nucleon-nucleon potentials.In this work, the reverse order energy-level is solved. Considering the multiple scatting in the sencond interaction of the 3plh diagram, which made the calculated results agree with the observed data.The results also show that the matrix elements of M-3Y force as the equivalent G-matrix elements are suitable for calculations of the nuclear in this region.