Fusion-fission and quasifission of superheavy systems with Z=110-116 formed in Ca 48 -induced reactions
Kozulin, E. M., Knyazheva, G. N., Itkis, I. M., Itkis, M. G., Bogachev, A.A., Chernysheva, E. V., Krupa, L., Hanappe, F., Dorvaux, O., Stuttgé, L., Trzaska, W., Schmitt, C., & Chubarian, G. (2014). Fusion-fission and quasifission of superheavy systems with Z=110-116 formed in Ca 48 -induced reactions. Physical Review C, 90(5), Article 054608. https://doi.org/10.1103/PhysRevC.90.054608
Published inPhysical Review C
© 2014 American Physical Society. Published in this repository with the kind permission of the publisher.
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 48Ca +232 Th, 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 48Ca +244 Pu 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. ...
PublisherAmerican Physical Society
ISSN Search the Publication Forum0556-2813
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