Excited states in neutron rich boron isotopes

R. Kanungo, Z. Elekes, H. Baba, Zs Dombrádi, Zs Fülöp, J. Gibelin, Á Horváth, Y. Ichikawa, E. Ideguchi, N. Iwasa, H. Iwasaki, S. Kawai, Y. Kondo, T. Motobayashi, M. Notani, T. Ohnishi, A. Ozawa, H. Sakurai, S. Shimoura, E. TakeshitaS. Takeuchi, I. Tanihata, Y. Togano, C. Wu, Y. Yamaguchi, Y. Yanagisawa, A. Yoshida, K. Yoshida

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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.

Original languageEnglish
Pages (from-to)206-214
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume608
Issue number3-4
DOIs
Publication statusPublished - Feb 24 2005

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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    Kanungo, R., Elekes, Z., Baba, H., Dombrádi, Z., Fülöp, Z., Gibelin, J., Horváth, Á., Ichikawa, Y., Ideguchi, E., Iwasa, N., Iwasaki, H., Kawai, S., Kondo, Y., Motobayashi, T., Notani, M., Ohnishi, T., Ozawa, A., Sakurai, H., Shimoura, S., ... Yoshida, K. (2005). Excited states in neutron rich boron isotopes. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 608(3-4), 206-214. https://doi.org/10.1016/j.physletb.2005.01.022