Li7+B11elastic and inelastic scattering in a coupled-reaction-channels approach

Abstract

Angular distributions of 7 Li + 11 B elastic and inelastic scattering were measured at E lab ( 11 B) = 44 MeV for the transitions to the ground and excited states of 7 Li and 11 B. The present data and data taken from the literature at E lab ( 7 Li) = 34 MeV were analyzed within the optical model and coupled-reaction-channels methods. Elastic and inelastic scattering, reorientations of 7 Li and 11 B, and the most important one-and two-step transfers were included in the channels-coupling scheme. The dependence of the 7 Li + 11 B optical potential on kinetic energy was taken into account. The deformation parameters of 7 Li and 11 B and optical model parameters for interaction of these nuclei in ground and excited states were deduced. The contributions of one-and two-step transfers to the elastic and inelastic scattering were estimated. A. A. RUDCHIK et al. PHYSICAL REVIEW C 72, 034608 (2005) 034608-2

7Li breakup polarization potential at near barrier energies

“…The deformation parameter obtained was β 2 = 0.89 (assuming a reduced radius of 1.25 fm), very close to the one obtained in Refs. [32,33], equal to 0.84. The nuclear and Coulomb deformation parameters were taken to be equal, but the fit was more sensitive to the values of the nuclear part, showing the importance of the nuclear component for this interaction between light nuclei.…”

Elastic and inelastic scattering of 7Li + 18O versus 7Li+16O

“…The deformation parameters from Refs. [10,11] were used for 7 Li in the present calculations: δ 2 = 2.0 fm, δ 4 = 1.0 fm. The parameters δ λ for 18 O were obtained by matching the calculated cross-sections to the data.…”

NEW DETERMINATION OF THE13C(α,n)16O REACTION RATE AND ITS INFLUENCE ON THEs-PROCESS NUCLEOSYNTHESIS IN AGB STARS

“…The singleparticle wave function describing the relative motion between α-cluster and 7 Li core in the 11 B ground state can have two components denoted by quantum numbers NL j = 3S 0 and 2D 2 , respectively, where N is the number of radial nodes that include the origin but not the infinity and L and j are the orbital and total angular momenta, respectively. The spectroscopic amplitudes of these two components are −0.509 and 0.629, respectively, from a shell model calculation (Kurath 1973), and −0.638 and −0.422, respectively, from the translationally invariant shell model (Rudchik et al 2005). In the present analysis, both sets of spectroscopic amplitudes were used and the resulting difference was incorporated in the total uncertainty of our result.…”