Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2003-02-11
Phys.Atom.Nucl. 66 (2003) 1086-1094; Yad.Fiz. 66 (2003) 1122-1130
Physics
Nuclear Physics
Nuclear Experiment
8 pages, 7 figures, talk presented at 7th International School-Seminar on Heavy-Ion Physics, May 27 - June 1, 2002, Dubna, Rus
Scientific paper
10.1134/1.1586421
The mechanism of fusion hindrance, an effect observed in the reactions of cold, warm and hot fusion leading to production of the superheavy elements, is investigated. A systematics of transfermium production cross sections is used to determine fusion probabilities. Mechanism of fusion hindrance is described as a competition of fusion and quasi-fission. Available evaporation residue cross sections in the superheavy region are reproduced satisfactorily. Analysis of the measured capture cross sections is performed and a sudden disappearance of the capture cross sections is observed at low fusion probabilities. A dependence of the fusion hindrance on the asymmetry of the projectile-target system is investigated using the available data. The most promising pathways for further experiments are suggested.
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