Investigation of the reaction 64Ni+238U being an option of synthesizing element 120.

Kozulin, E. M.; Knyazheva, G. N.; Itkis, I. M.; Itkis, M. G.; Bogachev, A. A.; Krupa, L.; Loktev, T. A.; Smirnov, S. V.; Zagrebaev, V. I.; ¨ayst¨o, J.; Trzaska, W.; Rubchenya, V. A.; Vardaci, Emanuele; Stefanini, A. M.; Cinausero, M.; Corradi, L.; Fioretto, E.; Mason, P.; Prete, G. F.; Silvestri, R.; Beghini, S.; Montagnoli, G.; Scarlassara, F.; Hanappe, F.; Khlebnikov, S. V.; Kliman, J.; Brondi, Augusto; Di Nitto, Antonio; Moro, Renata Emilia Maria; Gelli, N.; S. S. Z. I. L. N. E. R.,

doi:10.1016/j.physletb.2010.02.041

This study is concerned with the search for entrance channels suitable to synthesize elements with Z > 118. Mass–energy distributions as well as capture cross-sections of fission-like fragments have been measured for the reactions 64Ni+238U→302120 and 48Ca+238U → 286112 at energies near the Coulomb barrier. Compound nucleus fission cross-sections were estimated from the analysis of mass and total kinetic energy distributions. The cross-section drops three orders of magnitude for the formation of the compound nucleus with Z = 120 obtained in the reaction 64Ni + 238U compared to the formation of the compound nucleus with Z = 112 obtained in the reaction 48Ca + 238U at an excitation energy of the compound nucleus of about 45 MeV. From our analysis it turns out that the reaction 64Ni + 238U is not suitable for the synthesis of element Z = 120.

Investigation of the reaction 64Ni+238U being an option of synthesizing element 120 / E. M., K., G. N., K., I. M., I., M. G., I., A. A., B., L., K., T. A., L., S. V., S., V. I., Z., J., ¨., W., T., V. A., R., Vardaci, E., A. M., S., M., C., L., C., E., F., P., M., G. F., P., R., S., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 686:(2010), pp. 227-232. [10.1016/j.physletb.2010.02.041]