Elements Discrimination in the Study of Super-Heavy Elements using an Ionization Chamber
FULIS Collaboration, A. Wieloch, Z. Sosin, J. Peter, K. Lojek, N. Alamanos, N. Amar, R. Anne, J. C. Angelique, G. Auger, R. Dayras, A. Drouart, J. M. Fontbonne, A. Gillibert, S. Grevy, F. Hanappe, F. Hannachi, R. Hue, A. Khouaja, T. Legou, A. Lopez-Martens, E. Lienard, L. Manduci, F. de Oliveira Santos, G. Politi, M. G. Saint-Laurent, C. Stodel, L. Stuttge, J. Tillier, R. de Tourreil, A. C. C. Villari, J. P. Wieleczko
Abstract
Dedicated ionization chamber was built and installed to measure the energy loss of very heavy nuclei at 2.7 MeV/u produced in fusion reactions in inverse kinematics (beam of 208Pb). After going through the ionization chamber, products of reactions on 12C, 18O targets are implanted in a Si detector. Their identification through their alpha decay chain is ambiguous when their half-life is short. After calibration with Pb and Th nuclei, the ionization chamber signal allowed us to resolve these ambiguities. In the search for rare super-heavy nuclei produced in fusion reactions in inverse or symmetric kinematics, such a chamber will provide direct information on the nuclear charge of each implanted nucleus.
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