Examining the effect of nonlocality in(d,n)transfer reactions

Abstract

Background: In the last year we have been exploring the effect of the explicit inclusion of nonlocality in (d,p) reactions.Purpose: The goal of this work is to extend previous studies to (d,n) reactions, which, although similar to (d,p), have specific properties that merit inspection.Method: We apply our methods (both the distorted wave Born approximation and the adiabatic wave approximation) to (d, n) reactions on 16 O, 40 Ca, 48 Ca, 126 Sn, 132 Sn, and 208 Pb at 20 and 50 MeV. Results:We look separately at the modifications introduced by nonlocality in the final bound and scattering states, as well as the consequences reflected on the differential angular distributions. The cross sections obtained when using nonlocality explicitly are significantly different than those using the local approximation, just as in (d,p). Due to the particular role of Coulomb in the bound state, often we found the effects of nonlocality to be larger in (d,n) than in (d,p). Conclusions:Our results confirm the importance of including nonlocality explicitly in deuteron induced reactions.

Evidence forL-dependence generated by channel coupling:O16scattering fromC12Mackintosh1 2016Phys. Rev. C82320View full textAdd to dashboardCite

“…[7]. Very recently, the effects of nonlocality on direct reactions have been studied [36,37], and similar studies are required for the effects of L dependence.…”

Asymmetry dependence of Gogny-based optical potential

“…Nevertheless, NSM can provide some guidance for further nonlocal potential parametrizations. Moreover there is a renewal of interest in the community for nonlocal potentials and their impact on reaction calculations [38,39,40,41,42]. In this section, we present results of the fit of NSM imaginary potential using a Perey-Buck (PB) like form factor [16].…”

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“…In the preliminary results presented in Ref. [15], transfer cross sections are again significantly modified by the explicit introduction of non-locality in the initial scattering and bound state. Further work along these lines is in the pipeline.…”

“…[15], a similar study was performed for the 40 Ca(p, d) 41 Ca(g.s.) at several beam energies, replacing the Perey and Buck interaction by the dispersive optical model [16].…”