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Título

Precise branching ratios to unbound 12C states from 12N and 12B β-decays

AutorHyldegaard, S.; Forssén, C.; Diget, C.Aa.; Alcorta, Martín ; Barker, F. C.; Bastin, B.; García Borge, María José ; Boutami, Rafik ; Brandenburg, S.; Büscher, J.; Dendooven, P.; Van Duppen, P.; Eronen, T.; Fox, S.; Fulton, B. R.; Fynbo, H. O. U.; Huikari, J.; Huyse, M.; Jeppesen, Henrik B.; Jokinen, A.; Jonson, B.; Jungmann, K.; Kankainen, A.; Kirsebom, O.; Madurga, Miguel ; Moore, I.; Navrátil, P.; Nilsson, T.; Nyman, G.; Onderwater, G. J. G.; Penttilä, H.; Peräjärvi, K.; Raabe, R.; Riisager, K.; Rinta-Antila, S.; Rogachevskiy, A.; Saastamoinen, A.; Sohani, M.; Tengblad, Olof ; Traykov, E.; Vary, J. P.; Wang, Y.; Wilhelmsen, K.; Wilschut, H. W.; Äystö, Juha
Palabras clave[PACS] Few-body systems
[PACS] β decay; double β decay; electron and muon capture
[PACS] Properties of specific nuclei listed by mass ranges: 6 ≤ A ≤ 19
[PACS] Ab initio methods
Fecha de publicación4-jul-2009
EditorElsevier
CitaciónPhysics Letters B 678(5): 459–464 (2009)
ResumenTwo 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.
Descripción6 pages, 2 tables, 4 figures.--PACS nrs.: 21.45.-v; 23.40.-s; 27.20.+n; 21.60.De.--Printed version published Aug 3, 2009
Versión del editorhttp://dx.doi.org/10.1016/j.physletb.2009.06.064
URIhttp://hdl.handle.net/10261/16512
DOI10.1016/j.physletb.2009.06.064
ISSN0370-2693
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