Cross Section Measurements of Two-nucleon Pickup Reactions in the 13C+d System

Cross sections of two-nucleon pickup reactions in the 13C+d system, i.e. 13C(d, fi0) 11B and 13C(d, fi1) 11B ⁄ reactions have been measured for 180{350 keV deuterons. The angular distributions were measured in steps of 20 keV at 14 angles ranging from 30 – to 164–, while the excitation functions were measured at 90 – in steps of 10 keV. The excitation functions of 13C(d, fi0) 11B and 13C(d, fi1) 11B ⁄ reactions with 5 ¢167 and 3 ¢307 MeV Q-values, respectively, exhibit smooth variations of cross section with energy. The angular distribution of 13C(d, fi0) 11B reaction is asymmetric. With decreasing deuteron energy, the degree of asymmetry increases and below 220 keV deuteron energy the angular distribution is backward-peaked. This indicates a dominating contribution from the direct reaction in this channel below 220 keV deuteron energy. The angular distribution of 13C(d, fi1) 11B ⁄ reactions are highly symmetric about 90–, indicating a dominating compound nucleus contribution over this energy range. The trends of angular distribution of 13C(d, fi0) 11B and 13C(d, fi1) 11B ⁄ are consistent wit