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Sub-barrier fusion of $^{40}$Ca+$^{94}$Zr: Interplay of phonon and transfer couplings

Abstract : A precise fusion excitation function has been measured for $^{40}$Ca+$^{94}$Zr at near- and sub-barrier energies, and the fusion barrier distribution has been extracted. Comparing with the existing data for $^{40,48}$Ca+$^{90,96}$Zr shows that couplings to inelastic excitations determine the fusion cross sections and the shape of the barrier distributions near the barrier. At lower energies, the two systems possessing neutron-transfer channels with large positive Q-values ($^{40}$Ca+$^{94,96}$Zr) have remarkably similar cross sections, and both show a large enhancement with respect to the other systems and to coupled-channels calculations including up to three quadrupole and octupole phonons in the Zr targets.
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Contributor : Béatrice Forrler <>
Submitted on : Monday, July 23, 2007 - 4:10:13 PM
Last modification on : Tuesday, May 4, 2021 - 11:26:08 AM




A.M. Stefanini, B.R. Behera, S. Beghini, L. Corradi, E. Fioretto, et al.. Sub-barrier fusion of $^{40}$Ca+$^{94}$Zr: Interplay of phonon and transfer couplings. Physical Review C, American Physical Society, 2007, 76, pp.014610. ⟨10.1103/PhysRevC.76.014610⟩. ⟨in2p3-00164750⟩



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