DOI: 10.1140/epja/i2001-10241-9
Correlated emission of three
-particles
in the
-decay of
H.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
hans.fynbo@cern.ch
(Received: 21 March 2002 / Published online: 31 October 2002)
Abstract
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