Speaker
Mr
Miguel Madurga Flores
(Consejo Superior de Investigaciones Cientificas (CSIC))
Description
Light nuclei near the neutron drip-line have been studied intensively since the
discovery
of halos in this region. The complexity of their decays represent a great task for both
theoretical and experimental nuclear physics. The 11Li, the nucleus studied in this work,
exhibit a complex beta decay. The high Q-beta value (20.6 MeV) and the low nucleon
binding energy
in the neighbour nuclei allows multiple decay channels, several of them involving
the delayed emission
of charged particles.
We report here on the study of the decay channels involving charged particles in the
final
states (IS-417). The aim of the experiment is to disentangle the multiple particle
break-up channles taking advantage of the new
segmented silicon detectors, since the simultaneous detection of the particles
energies and hit positions is crucial to determine
the correct decay scheme. The experimental set-up was designed to fulfill this
condition, consisting in four DSSSD detectors in a compact
cubic geometry. The highly segmented nature of the DSSSD allows to reconstruct the
particles momenta from their impinging
position.
The decay channels that involve two charged particles in the final state have been
analysed. Special attention was given to the
11Li-->11Be*-->10Be*+n-->6He+alpha+n channel. The coincidence spectrum and
reconstructed excitation energy of this channel will be shown.
The decay through the previously known resonance at 9.5 MeV in 10Be is identified in
this resonance spectrum.
The excitation energy in 8Be will be shown as well, where possible resonances
through the 11Li-->11Be*-->2alpha+3n decay channel were looked for.
Simulations of these decay channels will be shown.
Author
Mr
Miguel Madurga Flores
(Consejo Superior de Investigaciones Cientificas (CSIC))
Co-authors
Dr
Hans Fynbo
(Univerity of Aarhus)
Dr
Karsten Riisager
(CERN)
Dr
Maria Jose Garcia Borge
(Consejo Superior de Investigaciones Cientificas (CSIC))
Dr
Olof Tengblad
(Consejo Superior de Investigaciones Cientificas (CSIC))
