Evidence of tensor interactions in 16O observed via (p,d) reaction
1 Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
2 School of Physics and Nuclear Energy Engineering, Beihang University, Beijing, 100191, China
3 General Education, Faculty of Engineering, Osaka Institute of Technology, Osaka 535-8585, Japan
4 Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
5 RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
6 Department of Physics, Kyoto University, Kitashirakawa, Kyoto 606-8502, Japan
7 Institute of Physics, Tsukuba University, Tsukuba Ibaraki 305-8571, Japan
8 Department of Physics, Nara Women’s University, Nara 630-8506, Japan
a e-mail: email@example.com
Published online: 20 March 2014
We measured the differential cross sections of the 16O(p,d) reaction populating the ground state and several low-lying excited states in 15O using 198-, 295- and 392-MeV proton beams at the Research Center for Nuclear Physics (RCNP), Osaka University, to study the effect of the tensor interactions in 16O. 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 positive-parity state(s). The observation is consistent with large components of high-momentum neutrons in the ground-state configurations of 16O due possibly to the tensor interactions.
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