Optical model with angular-momentum-dependent absorption, exchange of two nucleons, and the scattering of O16 on O18 near the Coulomb barrier

C. K. Gelbke, R. Bock, and A. Richter
Phys. Rev. C 9, 852 – Published 1 March 1974
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Abstract

The properties of the optical model with angular-momentum-dependent absorption are studied mainly using the scattering of O16 on O18 for energies near the Coulomb barrier. The results have been compared to two-nucleon transfer predictions. The L-dependent form factor has been taken as f(L)={1+exp[(LLC)ΔLC]}1. The following have been found: (1) There exists an approximate continuous ambiguity concerning the parameters LC and ΔLC which implies a simplification with respect to practical calculations. (2) The L cutoff in the imaginary potential produces an L staggering of the reflection coefficients similar to the one by the exchange model. (3) Both models yield a different energy dependence of the L staggering, since the oscillations of the reflection coefficients are, in the L-dependent optical model, connected with size resonances; in the case of exchange, however, with the symmetry of the reaction and the bound-state wave function of the exchanged particle.

[NUCLEAR REACTIONS heavy-ion scattering O16 on O18; two-nucleon exchange; deduced optical model with angular-momentum-dependent absorption.]

  • Received 15 October 1973

DOI:https://doi.org/10.1103/PhysRevC.9.852

©1974 American Physical Society

Authors & Affiliations

C. K. Gelbke

  • Max-Planck-Institut für Kernphysik, Heidelberg, Germany

R. Bock

  • Gesellschaft für Schwerionenforschung mbH, Darmstadt, Germany
  • Max-Planck-Institut für Kernphysik, Heidelberg, Germany

A. Richter

  • Institut für Experimentalphysik der Ruhr-Universität, Bochum, Germany

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Issue

Vol. 9, Iss. 3 — March 1974

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