Second experiment at VASSILISSA separator on the synthesis of the element 112 |
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Authors: | Yu Ts Oganessian A V Yeremin A G Popeko O N Malyshev A V Belozerov G V Buklanov M L Chelnokov V I Chepigin V A Gorshkov S Hofmann M G Itkis A P Kabachenko B Kindler G Münzenberg R N Sagaidak ? ?áro H-J Schött B ?treicher A V Shutov A I Svirikhin G K Vostokin |
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Institution: | (1) Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia;(2) Gesellschaft für Schwerionenforschung, D-64220 Darmstadt, Germany;(3) Comenius University, SK-84215 Bratislava, Slovakia |
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Abstract: | The upgraded separator VASSILISSA was used to confirm results of previous experiments on the synthesis of the heavy isotopes of the element 112 obtained in complete-fusion reactions of 48Ca and 238U. An additional reason was the non-observation of any events in the same reaction studied with the BGS separator at Berkeley. Limits of
for the atomic mass number of the observed spontaneously fissioning isotope were measured. The obtained results on the decay mode, half-life and production cross-section are in agreement with those obtained in our first experiment.Received: 10 June 2003, Revised: 29 July 2003, Published online: 2 December 2003PACS:
23.60. + e
decay - 25.70.-z Low and intermediate energy heavy-ion reactions - 25.85.Ca Spontaneous fission - 27.90. + b
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