Title: Precise branching ratios to unbound 12C states from 12N and 12B beta-decays
Authors: Hyldegaard, S ×
Forssen, C
Diget, C Aa
Alcorta, M
Barker, F C
Bastin, Beyhan
Borge, M J G
Boutami, R
Brandenburg, S
B├╝scher, Jeroen
Dendooven, P
Van Duppen, Piet
Eronen, T
Fox, S
Fulton, B R
Fynbo, H O U
Huikari, J
Huyse, Marc
Jeppesen, H B
Jokinen, A
Jonson, B
Jungmann, K
Kankainen, A
Kirsebom, O
Madurga, M
Moore, Iain D
Navratil, P
Nilsson, T
Nyman, G
Onderwater, G J G
Penttila, H
Perajarvi, K
Raabe, Riccardo
Riisager, Karsten
Rinta-Antila, S
Rogachevskiy, A
Saastamoinen, A
Sohani, M
Tengblad, O
Traykov, Emil
Vary, J P
Wang, Y
Wilhelmsen, K
Wilschut, H W
Aysto, J #
Issue Date: 4-Jul-2009
Series Title: Physics Letters B vol:678 pages:459-464
Abstract: Two complementary experimental techniques have been used to extract precise branching ratios to unbound states in 12C from 12N and 12B β-decays. In the first the three α-particles emitted after β-decay are measured in coincidence in separate detectors, while in the second method 12N and 12B are implanted in a detector and the summed energy of the three α-particles is measured directly. For the narrow states at 7.654 MeV (0+) and 12.71 MeV (1+) the resulting branching ratios are both smaller than previous measurements by a factor of ~2. The experimental results are compared to no-core shell model calculations with realistic interactions from chiral perturbation theory, and inclusion of three-nucleon forces is found to give improved agreement.
ISSN: 0370-2693
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

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