ANALYSIS OF D(α,αp)n REACTION

Abstract

Publisher Summary Though the off-energy-shell impulse approximation (OIA) is one of the simplest and most useful methods in the analysis of the three-body exit channel reactions, one should be careful in the application to the theory of D(α, α p)n reaction. The partial amplitudes calculated by OIA are too large in the S-, P-, and D-states of entrance channel and exceed the unitary limit in large for E lab ≥ 20MeV. The resultant strong suppression of the partial amplitudes in these states reflects on excit channels as the suppression in S- and P-states. These are the very reason why the new impulse approximation (NIA) gives rather good results. Though NIA is a simple and convenient method to estimate crudely the effects of the strong suppression of partial amplitudes, it is still an approximate theory in which only the effects of the final state interaction of spectator nucleon are taken into account and the α-D initial state interaction is not treated well. This chapter presents the method in which differential cross sections are calculated to estimate adequately the effects of the initial state interaction that result in the reduction of partial amplitudes in entrance channel. A phenomenological method is used to determine the reduction parameters of partial amplitudes.