Energy dependence of elastic scattering and one-nucleon transfer reactions induced by O16 on Pb208. I

Phys. Rev. C 18, 180 – Published 1 July 1978
Steven C. Pieper, M. H. Macfarlane, D. H. Gloeckner, D. G. Kovar, F. D. Becchetti, B. G. Harvey, D. L. Hendrie, H. Homeyer, J. Mahoney, F. Pühlhofer, W. von Oertzen, and M. S. Zisman

Abstract

Elastic scattering for O16 on Pb208 and the single-nucleon transfer reactions Pb208(O16, N15) Bi209 and Pb208(O16, O17)Pb207 have been measured at bombarding energies of 104, 138.5, and 216.6 MeV. A detailed optical model analysis of O16 on Pb208 elastic data from 80 to 216.6 MeV has been made. The Woods-Saxon potential parameters must be energy dependent to accurately reproduce the elastic data. Finite-range distorted-wave Born-approximation calculations employing both energy- independent and energy-dependent optical potentials are compared with the transfer data. With the exception of small shifts in angle, the distorted-wave Born approximation correctly predicts the shape of the angular distributions and the evolution of the relative single-particle strengths as functions of the bombarding energy. However, the distorted-wave Born approximation fails (by a factor of 2 to 3) to predict the observed energy dependence of the absolute single-particle transfer strength. It is demonstrated that this failure is not likely to be corrected by changes in the bound-state or optical-model potentials, if Woods-Saxon forms that fit the elastic data are used.

NUCLEAR REACTIONS O16 + Pb208 elastic, Pb208(O16, N15)Bi209, Pb208(O16, O17)Pb207, EL=104, 138.5, 216.6 138.5, 216.6 MeV, measured σ(θ); 80<~EL<~216.6 MeV optical-model and distorted-wave Born-approximation analysis, energy dependence of distorted-wave Born approximation.

DOI: http://dx.doi.org/10.1103/PhysRevC.18.180

  • Received 3 January 1978
  • Published in the issue dated July 1978

© 1978 The American Physical Society

Authors & Affiliations

Steven C. Pieper, M. H. Macfarlane, and D. H. Gloeckner*

  • Argonne National Laboratory, Argonne, Illinois 60439

D. G. Kovar

  • Argonne National Laboratory, Argonne, Illinois 60439 and Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

F. D. Becchetti, B. G. Harvey, D. L. Hendrie, H. Homeyer§, J. Mahoney, F. Pühlhofer**, W. von Oertzen§, and M. S. Zisman

  • Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

  • *Present address: Institute for Defense Analysis, 400 Army-Navy Drive, Arlington, Va. 22202.
  • Present address: Argonne National Laboratory, Argonne, Illinois 60439.
  • Present address: Cyclotron Laboratory, Physics Department, University of Michigan, Ann Arbor, Michigan 48105.
  • §Present address: Hahn-Meitner Institute, Berlin, Germany.
  • **Present address: Gesellschaft für Schwerionenforschung, Darmstadt Wixhausen, Germany.

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