抄録
The reactions F19(d, p)F20* and F19(d, p)20 have been studied with deuteron bombarding energy of 1.3 Mev to 2.0 Mev. Angular distributions of protons leaving F20 in 0.65 Mev excited state show a pronounced peak at about 60° over the entire deuteron energy range. On the other hand, those leaving F20 in the ground state vary with the deuteron bombarding energy and most of them show no peak in the forward direction and a large peak in the backward direction. The absolute yields of the reactions have been measured at θcm=54° and θcm=104° as functions of the bombarding energy. A marked difference in the energy dependence of the yields for the two reactions is noted. The yield for the reaction F19(d, p)F20 at θcm=104° shows a broad maximum centered at about 1.70 Mev deuteron energy, on the other hand that from the F19(d, p)F20* reaction at θcm=54° shows a slow increase with increasing deuteron energy. These results at our bombarding energies show that the reaction F19(d, p)F20 seems to proceed mostly by compound nucleus formation and the reaction F19(d, p)F20* (0.65 Mev) seems to be caused by the stripping process of d neutrons.
