States of 13C with abnormal radii
1 National Research Center ”Kurchatov Institute”, Moscow, 123182, Russia
2 Lomonosov Moscow State University, Moscow, 119991, Russia
3 Universidad Autonoma del Estado de Mexico, Toluca, 50000, Mexico
4 JINR, Dubna, Moscow Region, 141700, Russia
5 V.G. Khlopin Radium Institute, St.-Petersburg, 194021, Russia
6 Nuclear Phys. Ins, Almaty, 050032, Kazakhstan
7 JYFL, Jyvaskyla, FIN-40500, Finland
8 L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
9 MEPHI, Moscow, 115409, Russia
Published online: 11 May 2016
Differential cross-sections of the elastic and inelastic 13C + α scattering were measured at E(α) = 90 MeV. The root mean-square radii(<Rrms>) of 13C nucleus in the states: 8.86 (1/2−), 3.09 (1/2+) and 9.90 (3/2−) MeV were determined by the Modified diffraction model (MDM). The radii of the first two levels are enhanced compared to that of the ground state of 13C, confirming the suggestion that the 8.86 MeV state is an analogue of the Hoyle state in 12C and the 3.09 MeV state has a neutron halo. Some indications to the abnormally small size of the 9.90 MeV state were obtained.
© Owned by the authors, published by EDP Sciences - SIF, 2016
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