Improved $d$+$^4$He potentials by inversion, the tensor force and validity of the double folding model

Details Improved $d$+$^4$He potentials by inversion, the tensor force and validity of the double folding model Improved $d$+$^4$He potentials by inversion, the tensor force and validity of the double folding model

1997-11-18

arxiv.org/abs/nucl-th/9711034v1

Phys.Rev.C57:2462-2473,1998

Physics

Nuclear Physics

Nuclear Theory

22 pages, 12 figures, in Revtex

Scientific paper

10.1103/PhysRevC.57.2462

Improved potential solutions are presented for the inverse scattering problem for $d$+$^4$He data. The input for the inversions includes both the data of recent phase shift analyses and phase shifts from RGM coupled-channel calculations based on the NN Minnesota force. The combined calculations provide a more reliable estimate of the odd-even splitting of the potentials than previously found, suggesting a rather moderate role for this splitting in deuteron-nucleus scattering generally. The approximate parity-independence of the deuteron optical potentials is shown to arise from the nontrivial interference between antisymmetrization and channel coupling to the deuteron breakup channels. A further comparison of the empirical potentials established here and the double folding potential derived from the M3Y effective NN force (with the appropriate normalisation factor) reveals strong similarities. This result supports the application of the double folding model, combined with a small Majorana component, to the description even of such a loosely bound projectile as the deuteron. In turn, support is given for the application of iterative-perturbative inversion in combination with the double folding model to study fine details of the nucleus-nucleus potential. A $d$-$^4$He tensor potential is also derived to reproduce correctly the negative $^6$Li quadrupole moment and the D-state asymptotic constant.

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