Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2000-06-26
J.Phys.G26:1817-1828,2000
Physics
Nuclear Physics
Nuclear Theory
14 pages, 1 figure
Scientific paper
10.1088/0954-3899/26/12/306
We demonstrate that the kernel of the Lippmann-Schwinger equation, associated with interactions consisting of a sum of the Coulomb plus a short range nuclear potential, below threshold becomes degenerate. Taking advantage of this fact, we present a simple method of calculating the effective range function for negative energies. This may be useful in practice since the effective range expansion extrapolated to threshold allows to extract low-energy scattering parameters: the Coulomb-modified scattering length and the effective range.
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