The ( 7Li, 6Li) reaction on 28Si and 40Ca at [formula omitted

Abstract

Angular distributions for the ( 7Li, 6Li) reaction on 28Si and 40Ca to ground and excited states of 29Si and 41Ca have been measured at E( 7 Li) = 45 MeV . The shapes of the angular distributions are well described by exact finite-range DWBA calculations. To test the sensitivity of the calculated angular distributions to the exit channel potential, calculations were made using a strongly absorbing 7Li potential for both the entrance and exit channels. This calculation produced as good a fit to the shape of the angular distributions as did calculations with a 6Li potential in the exit channel, even though 7Li and 6Li elastic scattering on these target nuclei are not very similar. However, the magnitudes of the calculated cross sections are sensitive to the choice of potentials, and agreement with light-ion spectroscopic factors is obtained when the more weakly absorbing 6Li potentials are used. The spectroscopic factors obtained from the 40Ca( 7Li, 6Li) reaction study are in good agreement with the extensive light-ion results showing that the absolute magnitude of the reaction is correctly predicted by exact finite-range DWBA calculations that use optical parameters determined from elastic-scattering data.