EXCHANGE CONTRIBUTIONS TO NUCLEUS-NUCLEUS POTENTIALS DEDUCED FROM RGM PHASE SHIFTS USING INVERSION

摘要

We have determined, for certain representative cases, the representation in terms of local potential of the contribution to the nucleus-nucleus interaction of one-nucleon exchange, core exchange and intermediate exchange terms. We do this by applying S-l-to-V(r) inversion, using the IP method, to phase shifts from RGM calculations of Fujiwara and Tang, and LeMere et al. For t alpha at 18 MeV we find a shape parity dependence which is identical in nature to that found in other cases recently. For He-3+alpha at 60 MeV, a strong parity shape dependence still occurs, but of slightly different form. For alpha+O-16, the 4N exchange generates a small parity dependence of the same nature, but this seems to disappear in the full RGM calculation. In the last two cases, we show the characteristic forms of potentials due to the different exchange terms. These calculations indicate the scope of inversion as a means of extracting information from microscopic calculations concerning the nucleus-nucleus interaction. [References: 26]