Linearly increasing radius of the light fragment during the spontaneous fission of ${}^{282}$Cn

Abstract

In a previous article published in Phys. Rev. C 94 (2016) 014309 we have shown for the first time that the best dynamical trajectory during the deformation toward fission of the superheavy nucleus ${}^{286}$Fl is a linearly increasing radius of the light fragment, $R_2$. This macroscopic-microscopic result reminds us about the $\alpha$ or cluster preformation at the nuclear surface, assumed already in 1928, and proved microscopically many times. This time we give more detailed arguments for the neighboring nucleus ${}^{282}$Cn. Also similar figures are presented for heavy nuclei ${}^{240}$Pu and ${}^{252}$Cf. The deep minimum of total deformation energy near the surface is shown for the first time as a strong argument for cluster preformation.

Comments: 18 pages, 11 figures and 2 tables. arXiv admin note: substantial text overlap with arXiv:1609.00847