Invariant-mass spectroscopy of the unbound nucleus Be-13

Y. Kondo, T. Nakamura,Y. Satou,Y. Hashimoto,N. Matsui,T. Nakabayashi,T. Okumura,M. Shinohara, T. Matsumoto,N. Aoi,N. Fukuda,T. Gomi,M. Ishihara,H. Otsu,H. Sakurai,T. Sugimoto, S. Takeuchi,Y. Yanagisawa,N. Endo,M. Kitayama, T. Kobayashi,Y. Matsuda,S. Kawai,Y. Togano,H. J. Ong, T. K. Onishi,K. Ogata,S. Shimoura,M. Tamaki

FRENCH-JAPANESE SYMPOSIUM ON NUCLEAR STRUCTURE PROBLEMS: ORGANIZED IN THE FRAMEWORK OF FJNSP LIA AND EFES（2013）

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摘要

The unbound nucleus Be-13 was investigated by means of invariant-mass method in the one-neutron removal reaction of Be-14 at 69 MeV/nucleon. A p-wave resonance was observed at 0.51 MeV in the decay energy spectrum. The existence of the low-lying p state shows the quenching of the N = 8 shell gap.

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关键词

Unbound nucleus,invariant-mass method,intruder state

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