Figure 1

Energy spectra of $\alpha$ particles for $E_{\mathrm{c}.\mathrm{m}.}$ indicated.Reuse & Permissions

Figure 2

Decay curves of $\alpha$ activities for fermium isotopes.Reuse & Permissions

Figure 3

(Upper part) Evaporation residue cross sections for ${}^{250}\mathrm{F}\mathrm{m}$ (solid circles), ${}^{229}\mathrm{F}\mathrm{m}$ (open triangles), and ${}^{248}\mathrm{F}\mathrm{m}$ (reversed triangles) in the ${}^{16}\mathrm{O}+{}^{238}\mathrm{U}$ reaction. The fusion cross sections from the CCDEGEN code (thin solid curve) taking into account the deformation of ${}^{238}\mathrm{U}$ and couplings to the octupole phonon states in ${}^{238}\mathrm{U}$ are compared to the fission cross section from Refs. 1 (open circles) and 23 (open squares). The bold solid curves are the calculated ER cross sections. The thin dotted curve is the fusion cross section without any couplings. The thin dashed curve is the fusion cross section assuming the fusion hindrance in the tip collisions, and the corresponding ER cross sections are shown by bold dashed curves. (Lower part) Barrier distributions in Ref. 1 are compared to those from the coupled-channel calculation (solid curve). Two touching configurations corresponding to low and high interaction energies are illustrated. The dashed curve represents the barrier distribution which assumes the fusion hindrance in the tip collisions.Reuse & Permissions