par Kozulin, E.M.;Knyazheva, G.N.;Itkis, I.M.;Itkis, Mikhail;Bogachev, A.A.;Chernysheva, E.V. E.V.;Krupa, L.;Hanappe, Francis 
;Dorvaux, O.;Stuttge, Louise;Trzaska, Wladyslaw Henryk;Schmitt, Christian;Chubarian, G.G.
Référence Physical review. C. Nuclear physics, 90, 5, 054608
Publication Publié, 2014-11
;Dorvaux, O.;Stuttge, Louise;Trzaska, Wladyslaw Henryk;Schmitt, Christian;Chubarian, G.G.Référence Physical review. C. Nuclear physics, 90, 5, 054608
Publication Publié, 2014-11
Article révisé par les pairs
| Résumé : | Background: In heavy-ion-induced reactions the mechanism leading to the formation of the compound nucleus and the role of quasifission is still not clear. Purpose: Investigation of the quasifission process of superheavy composite systems with Z=110-116 and comparison with properties of fusion-fission and quasifission of lighter composite systems. Method: Mass and energy distributions of fissionlike fragments formed in the reactions Ca48+Th232, 238U, 244Pu, and 248Cm at energies near the Coulomb barrier have been measured using the double-arm time-of-flight spectrometer CORSET at the U-400 cyclotron of the FLNR JINR. Results: The most probable fragment masses as well as total kinetic energies and their dispersions in dependence on the interaction energies and ion-target combinations have been studied for asymmetric and symmetric fragments formed in the reactions. The capture cross sections were obtained for the reactions Ca48+Pu244 and 248Cm. The lower limits for fission barriers of 283-286Cn, 289-292Fl, and 293-296Lv compound nuclei were estimated. Conclusions: Analysis of the properties of symmetric fragments has shown that a significant part of these fragments may be attributed to fusion-fission process for the reactions 48Ca+238U, 244Pu, and 248Cm. |
