Multiple particle break-up study of low excited states in Be-9: The ghost peak in the Be-8 excitation energy spectrum visited
Journal article, 2007
The aim of this work is to find out the origin of the anomalous resonance in Be-8 seen in the reactions through excited states in Be-9. We have populated the Be-9 excited states by beta-decay of Li-9. Energy and direction of the two alpha particles has been detected and the neutron spectra reconstructed. In our work we identified the "anomalous resonance" in Be-8 observed in several reaction studies as coming from the decay of the 2.43 and 2.78 MeV states in Be-9. This anomalous resonance appears when the two detected alpha particles are assumed to form a resonance in Be-8. We argued that the main decaying channels for these two levels in Be-9 do not involve Be-8.
Author
M. Madurga
CSIC - Instituto de Estructura de la Materia (IEM)
M. J. G. Borge
CSIC - Instituto de Estructura de la Materia (IEM)
H. O. U. Fynbo
Aarhus University
Björn Jonson
Chalmers, Applied Physics, Subatomic Physics
Göran Hugo Nyman
Chalmers, Applied Physics, Subatomic Physics
Y. Prezado
CSIC - Instituto de Estructura de la Materia (IEM)
K. Riisager
Aarhus University
CERN
Olof Tengblad
Chalmers, Applied Physics, Subatomic Physics
European Physical Journal: Special Topics
1951-6355 (ISSN) 1951-6401 (eISSN)
Vol. 150 1 137-138Subject Categories
Physical Sciences
DOI
10.1140/epjst/e2007-00287-3