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Noneikonal calculations for few-body projectiles

1999; American Institute of Physics; Volume: 59; Issue: 3 Linguagem: Inglês

10.1103/physrevc.59.1560

1538-4497

J. M. Brooke, Jim Al-Khalili, J. A. Tostevin,

Astronomical and nuclear sciences

Calculations which improve upon the eikonal model description of the scattering of loosely bound n-cluster composite nuclei at low and medium energies are studied. Each cluster-target eikonal phase shift is replaced by the continuation of the corresponding exact partial wave phase shift to noninteger angular momenta. Comparisons with fully quantum mechanical calculations for two-body projectiles show that this yields an accurate practical alternative to few-body adiabatic model calculations. Calculations are shown to be accurate for projectile energies as low as 10 MeV/nucleon at which the eikonal approximation is no longer reliable.