Knock-on exchange contribution to the (6Li,6He) reaction

A microscopic DWBA analysis of the reactions sup(25,26)Mg(6Li,6He)sup(26,26)Al is performed using μ = 1.0 fmsup(-1) Yukawa central and r2. Yukawa (r2.Y) tensor potentials averaged over the 6Li(6He) cluster model wave functions. Knock-on exchange corrections corresponding to the central interaction are included using the local-energy approximation (LEA) method. The result is mainly to renormalize the calculated direct cross sections. The angular distribution shapes corresponding to the 25Mg target nucleus reflect the mixing of several angular momentum components which is resonably well reproduced by the calculations. The conclusion is that the quasi-elastic process is of major importance in the (6Li, 6He) transitions studied here. (author)