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Possible evidence of tensor interactions in 16O observed via (p,d) reaction

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arxiv 1205.4296 v1 pith:PQ2FXXGL submitted 2012-05-19 nucl-ex

Possible evidence of tensor interactions in 16O observed via (p,d) reaction

H. J. Ong , I. Tanihata , A. Tamii , T. Myo , K. Ogata , M. Fukuda , K. Hirota , K. Ikeda
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D. Ishikawa T. Kawabata H. Matsubara K. Matsuta M. Mihara T. Naito D. Nishimura Y. Ogawa H. Okamura A. Ozawa D. Y. Pang H. Sakaguchi K. Sekiguchi T. Suzuki M. Taniguchi M. Takashina H. Toki Y. Yasuda M. Yosoi J. Zenihiro
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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.

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