https://doi.org/10.1140/epja/i2008-10769-0
Regular Article - Experimental Physics
Kinematic identification of the 
t branch in the decay of 11Li
1
Instituto de Estructura de la Materia, CSIC, E-28006, Madrid, Spain
2
Departamento de Física Atómica, Molecular y Nuclear, Universidad Complutense, E-28040, Madrid, Spain
3
Department of Physics and Astronomy, University of Aarhus, DK-8000, Århus, Denmark
4
Fundamental Physics, Chalmers University of Technology, S-41296, Göteborg, Sweden
5
PH Department, CERN, CH-1211, Genève, Switzerland
* e-mail: madurga@iem.cfmac.csic.es
Received:
19
December
2008
Revised:
26
February
2009
Accepted:
6
March
2009
Published online:
4
April
2009
The -delayed 8
Li + t branch of the 11Li decay was identified via kinematical analysis of the charged particles observed in coincidence. The back-to-back events observed in a narrow angular acceptance were compared to a Monte Carlo simulation. The 8
Li + t sum energy spectrum was fitted assuming that the decay occurs through an intermediate state in 11Be . The resulting energy centroid and full-width half maximum for the intermediate state are 18.35(30)MeV and 1.5(4)MeV, respectively. The -delayed 8
Li + t branching ratio obtained from the coincidence spectrum, BR
t = 0.93(8)×10-4 , is in agreement with previous measurements but more precise.
© SIF, Springer-Verlag Berlin Heidelberg, 2009
