Orateur
M.
Guillaume Maquart
(IPNL)
Description
In 2011 an experiment was made with the EUROBALL IV array @Strasbourg.
The main research goal was to study of the fission products using 18O
beam and 208Pb as target. Nevertheless, the experiment lead also to the discovery
of broadened y-rays belonging to the 212Po nucleus. These y-rays are
aected by Doppler broadening and indicates that the lifetime of the states are
lower than the stopping time of the 212Po in the target(~1.4ps). The values
found in the [0,1-0,6]ps range lead to very enhanced E1 transitions and the
states with non-natural parity [8-; 6-; 4-] could be explained by an alpha + 208Pb
structure. However this experiment cannot highlight the 2- state expected in
many theoretical calculations. This is why we made a new experiment @ JYFL
laboratory (Jyväskylä, Finland) with JUROGAM II. Our hypothesis was that
the cascade of the 2- state has only two gammas in coincidence, which is also
the challenging issue in this analysis. This candidate has all required features
for our hypothesis, but more investigations are needed for a complete conrmation.
In this presentation we will discuss the analysis method and the main
challenges of the experiment.
Auteur principal
M.
Guillaume Maquart
(IPNL)
Co-auteurs
Prof.
Alain Astier
(CSNSM)
Dr
Clement Mancuso
(IPNL)
