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.
@article{arxiv.1205.4296,
title = {Possible evidence of tensor interactions in 16O observed via (p,d) reaction},
author = {H. J. Ong and I. Tanihata and A. Tamii and T. Myo and K. Ogata and M. Fukuda and K. Hirota and K. Ikeda and D. Ishikawa and T. Kawabata and H. Matsubara and K. Matsuta and M. Mihara and T. Naito and D. Nishimura and Y. Ogawa and H. Okamura and A. Ozawa and D. Y. Pang and H. Sakaguchi and K. Sekiguchi and T. Suzuki and M. Taniguchi and M. Takashina and H. Toki and Y. Yasuda and M. Yosoi and J. Zenihiro},
journal= {arXiv preprint arXiv:1205.4296},
year = {2015}
}