Influence of projectile <alpha>- breakup threshold on complete fusion

Abstract

Complete fusion excitations for 11,10B+159Tb have been measured at energies around the respective Coulomb barriers, and the existing complete fusion measurements for 7Li+159Tb have been extended to higher energies. The measurements show significant reduction of complete fusion cross sections at above-barrier energies for both the reactions, 10B+159Tb and 7Li+159Tb, when compared to those for 11B+159Tb. The comparison shows that the extent of suppression of complete fusion cross sections is correlated with the <alpha>-separation energies of the projectiles. Also, the two reactions, 10B+159Tb and 7Li+159Tb were found to produce incomplete fusion products at energies near the respective Coulomb barriers, with the <alpha>- particle emitting channel being the favoured incomplete fusion process in both the cases.

10 pages, 4 figures To be published in Phys. Letts. B

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• Coupled-channels calculations for nuclear reactions: from exotic nuclei to superheavy elements
• The total reaction cross section of heavy-ion reactions induced by stable and unstable exotic beams: The low-energy regime
• Exploring contributions from incomplete fusion in ${}^{6,7}$Li+${}^{209}$Bi and ${}^{6,7}$Li+${}^{198}$Pt reactions
• Unraveling the reaction mechanisms leading to partial fusion of weakly bound nuclei
• Fusion cross sections for 6,7Li + 24Mg reactions at energies below and above the barrier
• Complete and incomplete fusion of ${}^7$Li projectiles on heavy targets
• Systematic study of complete fusion suppression in reactions involving weakly bound nuclei at energies above the Coulomb barrier
• Importance of $1n$-stripping process in the ${}^6$Li+${}^{159}$Tb reaction
• Search of systematic behavior of breakup probability in reactions with weakly bound projectiles at energies around Coulomb barrier
• Fusion of Borromean nucleus ${}^9$Be with ${}^{197}$Au target at near barrier energies
• Semiclassical calculations of complete and incomplete fusion in collisions of weakly bound nuclei
• Neutron-transfer induced breakup of the Borromean nucleus ${}^9$Be
• Fusion of ${}^7$Li with ${}^{205}$Tl at near barrier energies
• Fusion of 16O+165Ho at deep sub-barrier energies
• Large back-angle quasielastic scattering for ${}^7$Li+${}^{159}$Tb