Excitation function for the production of 265108 and 266109 |
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Authors: | S Hofmann F P Heßberger V Ninov P Armbruster G Münzenberg C Stodel A G Popeko A V Yeremin S Saro M Leino |
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Institution: | 1. Gesellschaft für Schwerionenforschung mbH, D-64220, Darmstadt, Germany 2. Flerov Laboratory of Nuclear Reactions, JINR, 141 980, Dubna, Russia 4. Department of Physics, University of Jyv?skyl?, FIN-40351, Jyv?skyl?, Finland
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Abstract: | The excitation function for the production of266109 by the reaction 58Fe + 209Bi was investigated. Its position and width could be reproduced using the same values (E* = 13.9 MeV; FWHM=4.8 MeV) as inthe case of265108 produced by the reaction 58Fe + 208Pb. A cross-section maximum of (7.5 ± 2.7) pb was obtained. Referred to 265108, this value is reduced by a factor of 8.8 ± 3.3, that is more than the average reduction of cross-section by 3.7 per element. The hindrance factor of 2.4 ± 0.9 could be due to a specialization energy in the fusion process by the unpaired proton of 209Bi in the h9/2 orbital. A total of twelve decay chains of 266109 was measured, resulting in a mean half-life of ( 1.7?0.4 +0.6 ) ms. The new data confirm the decay data of the previously measured two decays of 266109. |
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