Correlated emission of three -particles in the -decay ofH.O.U. Fynbo1, Y. Prezado2, J. Äystö3, U.C. Bergmann4, M.J.G. Borge2, P. Dendooven3, W. Huang3, J. Huikari3, H. Jeppesen4, P. Jones3, B. Jonson5, M. Meister5, G. Nyman5, M. Oinonen1, K. Riisager4, O. Tengblad2, I.S. Vogelius4, Y. Wang3, L. Weissman1 and K.W. Rolander6
1 EP Division, CERN, CH-1211 Genève 23, Switzerland
2 Instituto Estructura de la Materia, CSIC, Serrano 113bis, E-28006 Madrid, Spain
3 Department of Physics, University of Jyväskylä, FIN-40351 Jyväskylä, Finland
4 Institut for Fysik og Astronomi, Aarhus Universitet, DK-8000 Aarhus C, Denmark
5 Experimentell Fysik, Chalmers Tekniska Högskola, S-412 96 Göteborg, Sweden
6 Fysiska Institutionen, Stockholms Universitet, Box 6730, S-113 85 Stockholm, Sweden
(Received: 21 March 2002 / Published online: 31 October 2002)
The -decay of 12N is used to populate -emitting excited states in 12C. The -particles from the break-up of both the 10.3 MeV and 12.71 MeV states were measured in coincidence with an efficient detector setup consisting of two double-sided Si strip detectors. The break-up of the 12.71 MeV 1 + state is an interesting testing ground for the different descriptions of multi-particle break-up, whereas the properties of the 10.3 MeV state, which under some astrophysical conditions is relevant for the production of 12C in stars, are poorly known. First results from the analysis of the data is presented and compared with Monte Carlo simulations.
21.45.+v - Few-body systems.
21.10.Hw - Spin, parity, and isobaric spin.
27.20.+n - .
© Società Italiana di Fisica, Springer-Verlag 2002