Speaker
Description
The experiment was done to study $^{11}$B($^{3}$He,d)$^{12}$C reaction with energy E($^{3}$He) = 25 MeV.
The aim of the experiment is to determine the properties of $^{12}$C states at high excitation energies and in particular to verify which of the conflicting spin-parity assignments of the 13.35 MeV state (2¯ or 4¯) is consistent with the data and optical model predictions.
The contradicting reports attribute either 2¯ [1-4] or 4¯ [5,6] for 13.35 MeV state in $^{12}$C. Unambiguous determination of the spin parity of the 13.35 MeV state is necessary to define its possible contribution to the part of the spectrum that we have previously identified as a new level in $^{12}$C with excitation energy of 13.75 MeV [7]. Initially, we have estimated this contribution as equal to the measured state 11.83 MeV (J$^π$ =2¯). This estimation assumed spin parity J$^π$ =2¯ of the 13.35 MeV state. However, from our experiment was settled spin-parity of the 13.35 state is 4¯.
References
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P.K. Bindal et al., Phys. Rev. C 9, #6 (1974)
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M. Freer et al.,Phys. Rev. Lett. 113, 012502 (2014)
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O.S. Kirsebom et al., Phys. Rev. C 81, 064313 (2010)
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A. A.Ogloblin et al., EPJ Web of Conf. 66, 02074 (2014).
