Possibility to produce element 120 in the 54Cr+248Cm hot fusion reaction

Synthesis of element 120 in the Cf-249(Ti-50,xn)(299-x) 120 and Cm-248(Cr-54,xn)(302-x) 120 fusion evaporation reactions has been evaluated by means of a modified fusion by diffusion model. It is found that the fusion probability of the system Cr-54 + Cm-248 is two times smaller than that of Ti-50 + Cf-249. On the other hand, the survival probability of the former is obviously greater than that of the latter. As a result, the loss in the fusion probability of the Cr-54 + Cm-248 reaction is compensated by its gain in survival probability. The calculated maximum evaporation residue cross sections in the Cf-249(Ti-50,3n)(296) 120 and Cm-248(Cr-54,4n)(298) 120 reactions are quite close: 0.034 and 0.024 pb, respectively. Besides, as compared to the system Ti-50 + Cf-249, the Cr-54 + Cm-248 combination has two advantages. First, Cm-248 is much easier accumulate a sufficient amount for the target material than Cf-249. Second, the isotope (298)120 has 178 neutrons, two neutrons more than the isotope (296)120. Therefore, the Cr-54 + Cm-248 combination should be one of most favorable candidates to produce superheavy element 120. DOI: 10.1103/PhysRevC.87.034616