Are spectroscopic factors from transfer reactions consistent with asymptotic normalisation coefficients?

Details Are spectroscopic factors from transfer reactions consistent with asymptotic normalisation coefficients? Are spectroscopic factors from transfer reactions consistent with asymptotic normalisation coefficients?

2007-01-24

arxiv.org/abs/nucl-th/0701068v1

Phys.Rev.C75:024601,2007

Physics

Nuclear Physics

Nuclear Theory

15 pages, 12 figures, Phys. Rev. C (in press)

Scientific paper

10.1103/PhysRevC.75.024601

It is extremely important to devise a reliable method to extract spectroscopic factors from transfer cross sections. We analyse the standard DWBA procedure and combine it with the asymptotic normalisation coefficient, extracted from an independent data set. We find that the single particle parameters used in the past generate inconsistent asymptotic normalization coefficients. In order to obtain a consistent spectroscopic factor, non-standard parameters for the single particle overlap functions can be used but, as a consequence, often reduced spectroscopic strengths emerge. Different choices of optical potentials and higher order effects in the reaction model are also studied. Our test cases consist of: $^{14}$C(d,p)$^{15}$C(g.s.) at $E_d^{lab}=14$ MeV, $^{16}$O(d,p)$^{17}$O(g.s.) at $E_d^{lab}=15$ MeV and $^{40}$Ca(d,p)$^{41}$Ca(g.s.) at $E_d^{lab}=11$ MeV. We underline the importance of performing experiments specifically designed to extract ANCs for these systems.

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