Energy and target dependence of projectile breakup effect in elastic scattering ofLi6

Effects ofLi6excitation inZnBowsher1, Clegg2, Karwowski3 et al. 1992Phys. Rev. C8010View full textAdd to dashboardCite

“…Symmetrically configured detectors were not employed Other authors [28,29] have used slightly difFerent prescriptions for the fr&;(k), however our results are insensitive to such details.…”

“…Our treatment of the Li-residual nucleus system follows closely that of Sakuragi and the Kyushu University group [28,29]. In terms of the complete set of states of d+a relative motion introduced above, the wave function gL+;x'(R, r) -we use outgoing-wave boundary conditions for clarity -can be expanded as As constructed, these intrinsic bin states 4&;(r) and the Li ground state form an orthonormal square-integrable set of states (14) with the result that the coupled-channels calculation can be carried out using conventional techniques.…”

Refractive versus resonant diffraction scattering of loosely bound6Li nuclei

“…Thus the DPP cannot be treated as a small perturbation for loosely bound nuclei and the usual phenomenological procedure in renormalizing the folding potential form factor may be questioned. It has been estimated that the DPP is strongly repulsive at the nuclear surface in the case of 6 Li [11]. This prompted Mahaux, Ngo and Satchler [12] to conjecture that for loosely bound nuclei the barrier anomaly may be absent due to the cancellation between the repulsive (DPP) and attractive (dispersive) components of the optical potential.…”

“…Sakuragi [11] performed a CCDC calculation of 6 Li scattering in a large range of incident energies and target mass. He found that coupling with α − d breakup states bings a repulsive DPP potential in the nuclear surface in such a way that reasonable fits can be obtained by fixing the normalization constant N V = 1 and N W = 0.4−0.7 when using the M3Y effective interaction supplemented by a pseudo zero range knock-on potential as we did in our model M3YZR.…”

Reaction studies with low-energy weakly-bound beams at INFN-LNS

“…Coupling to the breakup produces a repulsive polarization potential (e.g. [18]) which is responsible for the disappearance the usual threshold anomaly (TA) in the OP. At Laboratori Nazionali del Sud in Catania elastic scattering angular distributions were measured at several energies around and below the barrier for the systems 6,7 Li+ 64 Zn [19,20]; clear absence of the usual threshold anomaly has been observed in the case of 6 Li+ 64 Zn.…”