Abstract
Experimental study of the D(p, γ) 3He reaction was carried out, from 17.5° to 150° (lab), with the 156 MeV Orsay synchrocyclotron proton beam. Results for the photon differential cross section are given and the experimental arrangement is described. The cross-section maximum occurs at 52° (c.m.), reaching a value of 0.21 μb sr . A theoretical analysis is performed in the framework of the direct reaction mechanism, assuming the validity of the plane wave Born approximation. The deuteron S- and D-states and 3He S, S' and three D-states are taken into account. It is found that distortion effects and reasonable admixture of S' and D-states cannot remediate to the observed discrepancy between experimental and theoretical results. Calculations made with five usual 3He wave functions lead to the conclusion that direct reaction mechanism is not sufficient to explain the experimental angular distribution.
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