Dynamic polarization potential due to ${}^{6}$Li breakup on ${}^{12}$C

Dynamic polarization potential due to $^{6}$ Li breakup on $^{12}$ C

D. Y. Pang and R. S. Mackintosh

Phys. Rev. C 84, 064611 – Published 19 December 2011

Abstract

For $^{6}$ Li scattering from $^{12}$ C at five laboratory energies from 90 to 318 MeV, we study the dynamic polarization potential, DPP, due to the breakup of the projectile. The breakup is evaluated using standard continuum discretized coupled-channels formalism applied to a two-body cluster model of the projectile. The DPP is evaluated over a wide radial range using both direct $S$ -matrix-to-potential inversion and trivially equivalent local potential methods which yield substantially and systematically different results. The radius at which the real DPP changes from external repulsion to interior attraction varies systematically with energy. This should be experimentally testable because, according to notch tests, this crossover radius is within a radial range to which elastic scattering should be sensitive. The imaginary DPP has an emissive (generative) region at the lower energies; this may be associated with counterintuitive properties of $| S_{L} |$ .