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arXiv · 1610.00509

Unbound states in $^{12}$C populated by $\gamma$-decay of the $(J^{\pi},T) = (2^+,1)$ 16.11 MeV state

K. L. Laursen·H. O. U. Fynbo·O. S. Kirsebom·K. S. Madsøll·K. Riisager
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Abstract

The reaction $^{11}\textrm{B}+p$ has been used to populate the $(J^\pi,T) = (2^+,1)$ state at an excitation energy of 16.11 MeV in $^{12}$C. $\gamma$-decay to unbound states in $^{12}$C are identified from analysis of the decay of the populated daughter states. Due to a new technique, $\gamma$-decay to the 10.8 MeV 1$^-$ state is observed for the first time, and transitions to the 9.64 MeV (3$^-$) and 12.71 MeV (1$^+$) are confirmed. Unresolved transitions to natural parity strength at 10 MeV and 11.5-13 MeV are also observed. For all transitions partial widths are deduced

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K. L. Laursen, H. O. U. Fynbo, O. S. Kirsebom, K. S. Madsøll, K. Riisager. 2016-10-03. Unbound states in $^{12}$C populated by $\gamma$-decay of the $(J^{\pi},T) = (2^+,1)$ 16.11 MeV state. https://doi.org/10.1140/epja%2Fi2016-16370-0

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