TY - JOUR A1 - Stock, Reinhard A1 - Jahnke, U. A1 - Hendrie, D. L. A1 - Mahoney, J. A1 - Maguire, C. F. A1 - Schneider, W. F. W. A1 - Scott, D. K. A1 - Wolschin, G. T1 - Contribution of alpha cluster exchange to elastic and inelastic 16O + 20Ne scattering T2 - Physical review C N2 - Angular distributions for elastic and inelastic transitions in 20Ne + 16O scattering have been measured at E(20Ne)=50 MeV. For the 0+, 2+, and 4+ members of the 20Ne ground-state rotational band, the angular distributions exhibit pronounced backward peaking characteristic of an alpha -cluster exchange mechanism. The analysis of the ground-state transition in the first-order elastic transfer model yields no satisfactory fit although microscopic cluster form factors and full recoil corrections are employed. A coupled channels calculation for the 0+, 2+, and 4+ transitions reveals very strong coupling effects, indicating that the coherent superposition of first-order optical model and distorted-wave Born-approximation amplitudes may not be an adequate model for these reactions. NUCLEAR REACTIONS 16O(20Ne, 16O) and 16O(20Ne, 20Ne), elastic and inelastic transfer; E=50MeV; measured sigma (Ef , theta ); optical model + DWBA, and CCBA analyses. Y1 - 2005 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3921 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30-15631 VL - 14 IS - 5 SP - 1824 EP - 1831 ER -