Contribution Of The Multiple Scattering Correlation And Self Screening Effect To The Double-hole Spectra

Concent: Double-hole spectra about double closed shell of Ca³⁸,K³⁸,Fe⁵⁴andCo⁵⁴ are cal-culated by means of the Green funtion method. The matrix elements of M-3Y force as theequivalent G-matrix elements introduced by Bertsch are used by us. In the calculation, thefirst and the sencond interaction of the 3H1P diagrams are taken into account, the multiplescattering correlation and self screening effect introduced by Wu Shishu are also taken intoaccount. Therefore, much more diagramas are included in our work. The corresponding for-mulas of above content are given out. The numerical results we have gained agree with theexperimental date reasonably well. The results indicate that 3H1P irreducible vertical angle inthe second class diagram can obviously improve the energy spectra. Considering the multiplescatter in the 3H1P diagram of second interaction, it makes energy spectra heightened and thegap of energy amended. The energy spectra including the multiple scattering agree with theexperiment fairly well, it shows that the contribution of 3HIP multiple scattering correlation isevident. Comparatively the contribution of the PH self-screening to the energy spectrum is nothalf, achieving the neglect degree. Furthermore the results also show that the matrix elementsof M-3Y force as the equivalent G-matrix elements are suitable for calculations of the nuclearin this region.