Study of the (t, p) reaction on O 16, O 17 and O 18 using 5.55 MeV tritons

Abstract

The (t, p) reaction on O 16, O 17 and O 18 was studied at a triton bombarding energy of 5.55 MeV, with special attention to the reaction O 17(t, p)O 19. The position of several energy levels in O 19 was established. Good agreement was obtained in some cases between the measured proton angular distributions and the predictions of the plane wave double stripping theory. In other cases the contribution of other reaction modes seems to be appreciable. The spin and parity of the ground and 3.153 MeV levels in O 19 obtained by the O 17(t, p) reaction were determined unambiguously to be 5 2 + arising from the d 3 5 2 and d 5 2 s 2 1 2 configurations respectively. The 0.093 and 2.775 MeV levels could be identified with the 3 2 + and 9 2 + levels respectively of the d 3 5 2 configuration. The results for the O 16(t, p)O 18 reaction agreed with those of Jaffe et al. who used tritons of 5.50 MeV. In the O 18(t, p)O 20 reaction the spin and parity assignements for the ground and first three excited levels of O 20 were in essential agreement with those of Middleton et al. who bombarded with tritons of 10 MeV.