Low-energy incomplete fusion and its sensitivity to projectile structure

Low energy incomplete fusion: Observation of a significant incomplete fusion fraction atℓ< ℓcrit

“…In this code the input fusion cross section was calculated using the Bass formula [14]. The details of this model are given in our earlier work [1]. In this model the most important parameter is Level Density Parameter (LDP).…”

“…At moderate excitation energies the dominating fusion processes are (i) Complete Fusion (CF) and Incomplete Fusion (ICF) [1,2]. However, in recent years at low projectile energies i.e., near and/or above the Coulomb barrier (CB), the ICF sets in, where the CF is supposed to play a key role to the total fusion cross-section.…”

Quasi-elastic and massive transfer reactions in the16O+89Yreaction at beam energies around ≈4–5 MeV/nucleon

“…The transition from QET to DIC represents a shift in the reaction mechanism and massive transfer or incomplete fusion reactions lie in-between these two extremes in terms of impact parameter and kinetic energy dissipation. In the studies by Mermaz et al in 19 F + 89 Y reaction at E lab = 140 MeV [29], it was shown that the full kinetic energy dissipation takes place at larger angles even for PLFs with Z close to that of the projectile. This suggests that even PLFs formed following small mass transfer have contribution from dissipative reaction mechanisms at higher beam energies.…”

“…At lower beam energies (∼5 MeV/nucleon), the mechanism of incomplete mass transfer is not well understood, particularly the contribution from collision trajectories with different impact parameters as a function of beam energy. Several studies have been carried out in the recent past to investigate the reactions involving incomplete mass transfer at lower beam energies [19][20][21][22][23][24][25]. At energies very close to the entrance channel Coulomb barrier, such reactions are dominated by quasi-elastic transfer (QET) of a few nucleons [26,27].…”

“…Such structure effects have also been observed in the cross sections of evaporation I. Optical model parameters obtained from the fitting of elastic scattering data using the code SNOOPY 8Q [33]. residues (ERs) [19,31,32]. In the off-line radiochemical measurement of cross sections of evaporation residues in 16 O + 89 Y reaction by Tomar et al [32], enhancement in the cross sections of Rh (Z = 45) and Nb (Z = 41) isotopes with respect to the statistical model values was observed to be much larger compared to that in the case of other evaporation residues.…”