No abstract available

[en] The authors report on an investigation of the /sup 28/Si(α,tp) reaction to identify the various processes leading to the continuum part of the inclusive (α,t) spectrum, to determine their contribution to the inclusive triton yield and to find out to what extent α and /sup 3/He projectile breakup differ. Such effects can originate from the large difference in binding energy and/or from the absence of well defined excited states in /sup 3/He, whereas several excited states are known in /sup 4/He, whereas several excited states are known in /sup 4/He. The authors show that α-breakup shows a process which is absent in the corresponding /sup 3/He breakup reactions

[en] Proton-triton coincidence data from the reaction ²⁸Si(α,tp) at Esub(α) = 120 MeV show, in addition to contributions from direct breakup and stripping to unbound states, a process which is strongly forward peaked for Esub(t) < 63 MeV. This process has a maximum cross section for excitations of the target system in the region of 15 < Esub(X) < 45 MeV. The data are most likely due to direct inelastic breakup with a proton spectator. The pt coincidence yield at thetasub(t) = 10⁰ accounts for about 50% of the inclusive continuum (α,t) cross section at THETAsub(t) = 10⁰. (orig.)

[en] The authors report on the contributions of the channels (α, td), (α, tt), (α, t³He) and (α, tα) to the (α, t) spectrum at 10⁰ and estimate the contribution of the (α, tn) channel from the (α, ³Hep) data. A similar decomposition of the (α, ³He) spectrum at 10⁰ has been made. Furthermore, the properties are listed of the anisotropic components which also are observed in ³He-p, t-d and ³He-d coincidences. (orig.)