Fusion-Fission of Superheavy Nuclei at Low Excitation Energies

Fusion-Fission Dynamics of Super-Heavy Element Formation and Decay

“…Recently it has been also proved experimentally [21]. This effect is not included in P 0 CN calculated with the simplified master equation (3). To take this effect into account, one may introduce the weight function g(θ ), which turns to zero at θ = 0 (tip orientation, lowest barrier B 1 ) and is close to unity at θ = π/2 (side orientation, highest barrier B 2 ).…”

“…The interest in the synthesis of super-heavy nuclei has lately grown due to the new experimental results [1,2,3] demonstrating a real possibility of producing and investigating the nuclei in the region of the so-called "island of stability". The new reality demands a more substantial theoretical support of these expensive experiments which will allow most optimal choice of fusing nuclei and collision energies as well as a better estimation of the cross sections and unambiguous identification of evaporation residues.…”

Production cross sections of super heavy elements

“…After the type of the de-excitation process (the decay channel) was found and the characteristics of the evaporated particles ν = n, p, d, t, 3 He, 4 He or γ-quanta were simulated, in case no fission occurred. So their kinetic energy carried-away e v , orbital momentum − → l and angle θ were found.…”

“…In the last few years in the Laboratory of Nuclear Reactions, JINR, a lot of experimental information was obtained concerning the formation of superheavy elements (see [1,2] and references therein) as well as the mass distribution of fragments, produced in reactions which are used for the synthesis of superheavy elements [3]. In [3] for the 48 Ca + 238 U, 244 P u, 248 Cm reactions the fragment mass distributions were measured.…”

“…In [3] for the 48 Ca + 238 U, 244 P u, 248 Cm reactions the fragment mass distributions were measured. It was found out that in all cases a maximum in the distribution corresponding to the doubly magic nucleus 208 P b occurred.…”