Measurement of proton-evaporation rates in fusion reactions leading to transfermium nuclei
oleh: A. Lopez-Martens, A.V. Yeremin, M.S. Tezekbayeva, Z. Asfari, P. Brionnet, O. Dorvaux, B. Gall, K. Hauschild, D. Ackermann, L. Caceres, M.L. Chelnokov, V.I. Chepigin, M.V. Gustova, A.V. Isaev, A.V. Karpov, A.A. Kuznetsova, J. Piot, O.N. Malyshev, A.G. Popeko, Yu.A. Popov, K. Rezynkina, H. Savajols, A.I. Svirikhin, E.A. Sokol, P. Steinegger
| Format: | Article |
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| Diterbitkan: | Elsevier 2019-08-01 |
Deskripsi
The analysis of fission events following the implantation of evaporation residues produced in the fusion reaction of 50Ti and 209Bi at different bombarding energies has revealed 5 millisecond decays, which are attributed to the spontaneous fission of proton-evaporation channels. The average cross sections for proton evaporation are found to be ∼100 and 10 times smaller than the largest neutron-evaporation channel cross section at the same excitation energy. These results suggest that the proton evaporation channel, albeit weak, may represent a realistic alternative to synthesize new, more neutron rich super heavy nuclei. Keywords: Fusion-evaporation reaction, Proton evaporation, Super heavy nuclei, Cross section