The n-d initial-state interaction in n-d break-up

Abstract

The n-d initial-state interaction is shown to be an important process in the break-up reaction n+d → n+n+p. Two approximate break-up models are considered: one, without the n-d initial-state interaction, is obtained by iterating the Faddeev equations, giving the ordinary truncated multiple-scattering series; the second model is also based on the Faddeev equations, but with the initial-state interaction mechanism, which occurs only implicitly in the Faddeev equations, correctly retained. Numerical calculations are done using the n-d separablepotential model, in order that the two approximate models may be compared with exact solutions. The results show that the correct inclusion of the initial-state interaction improves the results very much.