Description of large angle Li6 + Ca40 scattering from 26 to 34 MeV using double-folded and α+d cluster potentials

J. Cook, K. W. Kemper, and M. F. Vineyard
Phys. Rev. C 26, 486 – Published 1 August 1982
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Abstract

New elastic scattering data are reported for Li6 + Ca40 at 26 and 30 MeV, and inelastic data at 30 MeV. The measurements at 30 MeV were taken to provide a complete angular distribution at this energy and showed that previously published large angle data at 30 MeV are incorrectly normalized and must be multiplied by 0.65. The new angular distribution at 26 MeV displays enhanced large angle cross sections as has also been previously observed at 30 and 34 MeV. Double-folded or cluster potentials are able to describe the elastic scattering of Li6 + Ca40 over the energy range 26-34 MeV, including the large angle oscillations. No special property is required to explain the large angle behavior other than weak absorption. The double-folding model has also been used to determine deformation lengths for the first 2+, 3, and 5 states in Ca40. The values for the 2+ and 3 states agree well with those found from electron, Be9 and B11 inelastic scattering, while the value for the 5 state is a factor of 2 smaller.

NUCLEAR REACTIONS Ca40(Li6,Li6)Ca40, E=26 MeV, θc.m.=9°161°; Ca40(Li6, Li6)Ca40* elastic and 3, 2+, 5 E=30 MeV, θc.m.=9°78°; measured σ(θ). Double-folding model, cluster folding model, deduced optical model parameters; DWBA, deduced deformation lengths at 30 MeV.

  • Received 23 April 1982

DOI:https://doi.org/10.1103/PhysRevC.26.486

©1982 American Physical Society

Authors & Affiliations

J. Cook, K. W. Kemper, and M. F. Vineyard

  • Department of Physics, Florida State University, Tallahassee, Florida 32306

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Vol. 26, Iss. 2 — August 1982

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