Attempt to produce the isotopes of element 108 in the fusion reaction<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Xe</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>136</mml:mn></mml:mrow></mml:mmultiscripts><mml:mo>+</mml:mo><mml:mmultiscripts><mml:mi mathvariant="normal">Xe</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>136</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>

A setup of the experiment on the production of the isotopes with $Z=108$ in the fusion reaction $^{136}\mathrm{Xe}+^{136}\mathrm{Xe}$ and the obtained results are presented. At the excitation energy $0\ensuremath{\leqslant}{E}_{x}\ensuremath{\leqslant}30$ MeV of the $^{272}\mathrm{Hs}*$ compound nucleus the upper limit of the cross section for evaporation residues ${\ensuremath{\sigma}}_{(1\ensuremath{-}3)n}\ensuremath{\leqslant}4$ pb has been measured. The experimental results together with the data from asymmetric reactions point to a strong limitation of the Hs compound nucleus formation with increasing Coulomb forces in the entrance channel of the reaction.

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