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Study of $^{124}$Sn+$^{136}$Xe fusion-evaporation: analysis of a rare-event experiment
Benoît Avez1, Antoine Drouart1, C. Stodel2, Cédric Simenel1, J. Alcantara2, M. Adamczyk3, P. Banka3, E. Bonnet2, E. Clément2, R. Dayras1, C. Force2, C. Golabek2, A. Gonciarz3, S. Grevy2, K. Hauschild4, D. Jacquet5, A. Korichi4, T. Kozik3, P. Lazko3, M. Morjean2, A. Popeko6, T. Roger2, M.-G. Saint-Laurent2, Z. Sosin3, B. Sulignano1, C. Theisen1, A. Wieloch3, 5, A. Yeremin6, B. Yilmaz7, M. Zielinska8

Fusion-evaporation in the $^{124}$Sn+$^{136}$Xe system is studied using a high intensity xenon beam provided by the Ganil accelerator and the LISE3 wien filter for the selection of the products. Due to the mass symmetry of the entrance system, the rejection of the beam by the spectrometer was of the order of $5times10^8$. We have thus performed a detailed statistical analysis to estimate random events and to infer the fusion-evaporation cross sections. No signicant decay events were detected and upper limit cross sections of 172~pb, 87~pb and 235~pb were deduced for the synthesis of $^{257}$Rf, $^{258}$Rf and $^{259}$Rf, respectively.
1 :  SPhN - Service de Physique Nucléaire
2 :  GANIL - Grand Accélérateur National d'Ions Lourds
3 :  Smoluchowski Institute of Physics
4 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
5 :  IPNO - Institut de Physique Nucléaire d'Orsay
6 :  Flerov Laboratory of nuclear reactions,
7 :  Physics Department, Ankara University
8 :  Heavy Ion Laboratory
Physique/Physique Nucléaire Expérimentale
Superheavy elements – fusion-evaporation – Statistical data analysis
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