  We have measured 16O(p,d) reaction using 198-, 295- and 392-MeV proton beams
to search for a direct evidence on the effect of the tensor interactions in
light nucleus. Differential cross sections of the one-neutron transfer
reactions populating the ground states and several low-lying excited states in
15O were measured. Comparing the ratios of the cross sections for each excited
state to the one for the ground state over a wide range of momentum transfer,
we found a marked enhancement for the positive-parity state(s). The observation
indicates large components of high-momentum neutrons in the initial
ground-state configurations, due possibly to the tensor interactions.
