Improved di-neutron cluster model forHe6scattering

Abstract

The structure of the three-body Borromean nucleus 6 He is approximated by a two-body di-neutron cluster model. The binding energy of the 2n-α system is determined to obtain a correct description of the 2n-α coordinate, as given by a realistic three-body model calculation. The model is applied to describe the breakup effects in elastic scattering of 6 He on several targets, for which experimental data exist. We show that an adequate description of the di-neutron-core degree of freedom permits a fairly accurate description of the elastic scattering of 6 He on different targets.A. M. MORO et al. PHYSICAL REVIEW C 75, 064607 (2007)

He6breakup dynamic polarization potential reexamined

“…The CDCC calculations presented here for 27 MeV repeat exactly those of Moro et al [4] for 6 He + 208 Pb. The same 2n + α binding potentials and 2n + 208 Pb and α + 208 Pb optical potentials were employed, along with an identical binning scheme for the 2n + α continuum of 6 He.…”

“…Moro et al [4] developed a two-body 2n-α cluster model (hereafter, Moro-model) of 6 He specifically for application to the scattering of this nucleus from high-Z nuclei such as 208 Pb. The parameters of the two-body model were chosen to reproduce relevant properties of a three-body model.…”

“…[1][2][3]. The main purpose of this work is to present revised DPPs, taking advantage of a greatly improved cluster model [4] for 6 He. The nature of this new model is such that we expect considerable modifications to the DPP.…”

“…[1] and in Moro et al [4]. To explore the breakup DPP at an energy region closer to the barrier, we also calculated the DPP at 22 MeV.…”

Four-body continuum-discretized coupled-channels calculations

“…Previous CDCC calculations for the reactions studied in this work [16,44,52] have shown that using these partial waves is sufficient to obtain converged results and to describe satisfactorily the existing data for such reactions. We did not attempt to include higher partial waves, since this would make the calculations very demanding computationally.…”