Effect of tensor interactions in ¹⁶O studied via (p,d) reaction

We report a study on the effect of the tensor interactions in ¹⁶O via the (p,d) reaction using proton beams at 198, 295, and 392 MeV at the Research Center for Nuclear Physics (RCNP), Osaka University. Differential cross sections populating the ground state and several low-lying excited states in ¹⁵O were measured. Dividing the cross sections for each excited state by the one for the ground state and comparing the ratios over a wide range of momentum transfer, we found a marked enhancement of the ratio for the 5/2⁺ and/or 1/2⁺ state(s). The observation indicates large components of high-momentum neutrons in the ground-state configurations of ¹⁶O due possibly to the tensor interactions. (author)