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Light particle accompanied quasifission in superheavy composite systems |
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| Authors: | V A Rubchenya A A Alexandrov S V Khlebnikov V G Lyapin V A Maslov Yu E Penionzhkevich G Prete Yu G Sobolev G P Tyurin W H Trzaska D N Vakhtin E Vardaci |
| Institution: | 1. Khlopin Radium Institute, St. Petersburg, Russia 2. Department of Physics, University of Jyv?skyl?, Jyv?skyl?, Finland 3. Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russia 4. Helsinki Institute of Physics, Helsinki, Finland 5. Laboratori Nazionali di Legnaro, INFN, Legnaro, Italy 6. Dipartimento di Scienze Fisiche and INFN, Napoli, Italy |
| Abstract: | The dynamics of the excited superheavy system with Z = 118 in the reaction 86Kr + 208Pb at E Kr = 460, 500, and 600 MeV has been investigated. The mass and kinetic energy of binary fragments were measured by the time-of-flight method. Double-differential distributions of protons and α particles were measured in coincidence with fragments. The proton spectra can be described considering only evaporation from fragments. Evidence of the neck fragmentation was obtained from analysis of double-differential α spectra. Properties of the α-particle neck fragmentation component are close to those known from the ternary fission of actinide nuclei, but the multiplicity is much larger than can be expected from extrapolation of the ternary fission data. The text was submitted by the authors in English. |
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