Testing the Perey effect

Titus, L. J.; Nunes, Filomena M.

doi:10.1103/PhysRevC.89.034609

Testing the Perey effect

Journal Article · Wed Mar 12 00:00:00 EDT 2014 · Physical Review C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.89.034609· OSTI ID:1332498

Titus, L. J. ^[1]; Nunes, Filomena M. ^[2]

Michigan State Univ., East Lansing, MI (United States); michigan state university
Michigan State Univ., East Lansing, MI (United States)

Here, the effects of non-local potentials have historically been approximately included by applying a correction factor to the solution of the corresponding equation for the local equivalent interaction. This is usually referred to as the Perey correction factor. In this work we investigate the validity of the Perey correction factor for single-channel bound and scattering states, as well as in transfer (p, d) cross sections. Method: We solve the scattering and bound state equations for non-local interactions of the Perey-Buck type, through an iterative method. Using the distorted wave Born approximation, we construct the T-matrix for (p,d) on ¹⁷O, ⁴¹Ca, ⁴⁹Ca, ¹²⁷Sn, ¹³³Sn, and ²⁰⁹Pb at 20 and 50 MeV. As a result, we found that for bound states, the Perey corrected wave function resulting from the local equation agreed well with that from the non-local equation in the interior region, but discrepancies were found in the surface and peripheral regions. Overall, the Perey correction factor was adequate for scattering states, with the exception of a few partial waves corresponding to the grazing impact parameters. These differences proved to be important for transfer reactions. In conclusion, the Perey correction factor does offer an improvement over taking a direct local equivalent solution. However, if the desired accuracy is to be better than 10%, the exact solution of the non-local equation should be pursued.

View Accepted Manuscript (DOE)

Research Organization:: Michigan State Univ., East Lansing, MI (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: FG52-08NA28552

OSTI ID:: 1332498

Journal Information:: Physical Review C, Nuclear Physics, Journal Name: Physical Review C, Nuclear Physics Journal Issue: 3 Vol. 89; ISSN 0556-2813; ISSN PRVCAN

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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