Functional medium-dependence of the nonrelativistic optical model potential

Details Functional medium-dependence of the nonrelativistic optical model potential Functional medium-dependence of the nonrelativistic optical model potential

2007-06-19

arxiv.org/abs/0706.2695v1

Phys.Rev.C76:014613,2007

Physics

Nuclear Physics

Nuclear Theory

11 pages, 5 figures, submitted to Phys. Rev. C

Scientific paper

10.1103/PhysRevC.76.014613

By examining the structure in momentum and coordinate space of a two-body interaction spherically symmetric in its local coordinate, we demonstrate that it can be disentangled into two distinctive contributions. One of them is a medium-independent and momentum-conserving term, whereas the other is functionally --and exclusively-- proportional to the radial derivative of the reduced matrix element. As example, this exact result was applied to the unabridged optical potential in momentum space, leading to an explicit separation between the medium-free and medium-dependent contributions. The latter does not depend on the strength of the reduced effective interaction but only on its variations with respect to the density. The modulation of radial derivatives of the density enhances the effect in the surface and suppresses it in the saturated volume. The generality of this result may prove to be useful for the study of surface-sensitive phenomena.

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