RPA correction to the optical potential

Free access article

Issue		EPJ Web of Conferences Volume 2, 2010 CNR*09 - Second International Workshop on Compound Nuclear Reactions and Related Topics


Article Number		01002
Number of page(s)		4
Section		Optical Model Calculations
DOI		10.1051/epjconf/20100201002
Published online		09 March 2010

EPJ Web of Conferences 2, 01002 (2010)

RPA correction to the optical potential

G. Blanchon¹^a, M. Dupuis¹, N. Vinh Mau¹^,2 and E. Bauge¹

¹ CEA, DAM, DIF, F-91297 Arpajon, France
¹ IPN Orsay, Division de Physique Théorique, 91406 - Orsay, France

^a e-mail: guillaume.blanchon@cea.fr

Abstract

In studies of nucleon elastic scattering, a correction to the microscopic optical potential built from Melbourne g-matrix was found to be necessary at low nucleon incident energy [1,2]. Indeed, at energies lower than 60 MeV, the absorption generated from Melbourne g-matrix is too weak within 25%. Coupling to collective excited states of the target nucleus are not included in the g-matrix and could explain the missing absorption. We propose to calculate this correction to the optical potential using the Gogny D1S effective nucleon-nucleon interaction in the coupling to excited states of the target. We use the Random Phase Approximation (RPA) description of the excited states of the target with the same interaction.

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