Simultaneous analysis of elastic scattering and transfer/breakup channels for the 6He+208Pb reaction at energies near the Coulomb barrier

TL;DR

This study investigates elastic scattering and transfer/breakup channels in the 6He+208Pb reaction near the Coulomb barrier, demonstrating that including two-neutron transfer channels improves the description of experimental data.

Contribution

It introduces a combined CRC and CDCC analysis to simultaneously describe elastic scattering and transfer/breakup channels in the 6He+208Pb system.

Findings

Including transfer channels improves elastic scattering fits.

CDCC reproduces elastic data but not transfer/breakup data.

TELP explains features of phenomenological optical models.

Abstract

The elastic and alpha-production channels for the 6He+208Pb reaction are investigated at energies around the Coulomb barrier (E_{lab}=14, 16, 18, 22, and 27 MeV). The effect of the two-neutron transfer channels on the elastic scattering has been studied within the Coupled-Reaction-Channels (CRC) method. We find that the explicit inclusion of these channels allows a simultaneous description of the elastic data and the inclusive alpha cross sections at backward angles. Three-body Continuum-Discretized Coupled-Channels (CDCC) calculations are found to reproduce the elastic data, but not the transfer/breakup data. The trivially-equivalent local polarization potential (TELP) derived from the CRC and CDCC calculations are found to explain the features found in previous phenomenological optical model calculations for this system.