Synthesis of the isotopes of elements 118 and 116 in theCf249andCm245+Ca48fusion reactions
| Autor: | K. J. Moody, Boris Gikal, M. A. Stoyer, M. G. Itkis, P. A. Wilk, J. F. Wild, G. G. Gulbekian, Yu. Ts. Oganessian, Sergey Bogomolov, D. A. Shaughnessy, S. Iliev, R. W. Lougheed, K. Subotic, F. Sh. Abdullin, Yu. S. Tsyganov, A. N. Polyakov, Valery Zagrebaev, A. N. Mezentsev, J. M. Kenneally, Yu. V. Lobanov, I. V. Shirokovsky, R. N. Sagaidak, Grigory K. Vostokin, N. J. Stoyer, J. B. Patin, A. M. Sukhov, V. G. Subbotin, V. K. Utyonkov, A. A. Voinov, J. H. Landrum |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Physical Review C. 74 |
| ISSN: | 1089-490X 0556-2813 |
| Popis: | The decay properties of {sup 290}116 and {sup 291}116, and the dependence of their production cross sections on the excitation energies of the compound nucleus, {sup 293}116, have been measured in the {sup 245}Cm({sup 48}Ca,xn){sup 293-x}116 reaction. These isotopes of element 116 are the decay daughters of element 118 isotopes, which are produced via the {sup 249}Cf+{sup 48}Ca reaction. They performed the element 118 experiment at two projectile energies, corresponding to {sup 297}118 compound nucleus excitation energies of E* = 29.2 {+-} 2.5 and 34.4 {+-} 2.3 MeV. During an irradiation with a total beam dose of 4.1 x 10{sup 19} {sup 48}Ca projectiles, three similar decay chains consisting of two or three consecutive {alpha} decays and terminated by a spontaneous fission (SF) with high total kinetic energy of about 230 MeV were observed. The three decay chains originated from the even-even isotope {sup 294}118 (E{sub {alpha}} = 11.65 {+-} 0.06 MeV, T{sub {alpha}} = 0.89{sub -0.31}{sup +1.07} ms) produced in the 3n-evaporation channel of the {sup 249}Cf+{sup 48}Ca reaction with a maximum cross section of 0.5{sub -0.3}{sup +1.6} pb. |
| Databáze: | OpenAIRE |
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