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Excited states in neutron rich boron isotopes

Abstract : New experimental results on in-beam gamma spectroscopy of neutron rich boron isotopes are presented for 17B and its neutron removal fragments 14,15B, after scattering with a H2 target. A gamma transition for 17B is observed at 1089±15 keV. The fragment 15B is observed abundantly associated with a gamma transition of 1336±10 keV. This suggests for the first time a core-excited structure for 17B thereby providing a new insight into its structure. Observations for 12,14B are also presented. The data set provides a useful systematic study of first excited states of neutron rich boron isotopes showing the dramatic drop in excitation energy beyond N=8
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Submitted on : Wednesday, March 15, 2006 - 9:29:53 AM
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R. Kanungo, Z. Elekes, H. Baba, Zs. Dombrádi, Zs. Fülöp, et al.. Excited states in neutron rich boron isotopes. Physics Letters B, Elsevier, 2005, 608, pp.206-214. ⟨10.1016/j.physletb.2005.01.022⟩. ⟨in2p3-00025778⟩