Ununoctium Production

According theoretical calculations of Robert Smolanczuk from Soltan Institute for Nuclear studies (Poland), Ununoctium can be synthesized by bombarding of Lead-208 by Kripton-86 ions, according to scheme:

²⁰⁸₈₂Pb + ⁸⁶₃₆Kr -> ²⁹³₁₁₈Uuo + ¹₀n

Unfortunately, all attempts to synthesize Ununoctium accordingly to this reaction were unsuccessful.

Ununoctium was successfully synthesized by bombardment of Californium-249 target by Calcium-48 ions. The nuclear fusion cross section of this reaction is very small, 0.5 pb (picobarn) = 5x10⁻⁴¹ m², which mean that the fusion reaction probability is very small. In total it was required 4x10¹⁹ calcium ions and 4 months time to synthesize 1 atom of Ununoctium.

²⁴⁹₉₈Cf +⁴⁸₂₀Ca -> ²⁹⁴₁₁₈Uuo + 3¹₀n