Low-lying Proton Intruder State in 13B

A. Odahara; A. Saito; E. Ideguchi; E. Takeshita; H. Baba; H. Hasegawa; H. Iwasaki; H. Sakurai; K. Demichi; K. Kurita

arxiv: 0807.0478 · v1 · submitted 2008-07-03 · ⚛️ nucl-ex

Low-lying Proton Intruder State in 13B

S. Ota , S. Shimoura , H. Iwasaki , M. Kurokawa , S. Michimasa , N. Aoi , H. Baba , K. Demichi

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Z. Elekes T. Fukuchi T. Gomi S. Kanno S. Kubono K. Kurita H. Hasegawa E. Ideguchi N. Iwasa Y.U. Matsuyama K.L. Yurkewicz T. Minemura T. Motobayashi T. Murakami M. Notani A. Odahara A. Saito H. Sakurai E. Takeshita S. Takeuchi M. Tamaki T. Teranishi Y. Yanagisawa K. Yamada M. Ishihara

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classification ⚛️ nucl-ex

keywords stateprotonintruderlow-lyingnucleusamevangularassigned

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The neturon rich nucleus 13B was studied via the proton transfer reaction 4He(12Be,13B \gamma) at 50AMeV. The known 4.83-MeV excited state was strongly populated and its spin and parity were assigned to 1/2+ by comparing the angular differential cross section data with DWBA calculations. This low-lying 1/2+ state is interpreted as a proton intruder state and indicates a deformation of the nucleus.

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Low-lying Proton Intruder State in 13B

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