Inelastic pion scattering from O18

Phys. Rev. C 21, 679 – Published 1 February 1980
T. -S. H. Lee and R. D. Lawson


The inelastic scattering of 164 MeV pions from O18 is studied using the distorted-wave impulse approximation in momentum space. The sensitivity of the predictions to various shell model descriptions of the yrast 2+ state is examined in detail. The excitation of the triplet of states (41+, 02+, 22+) near 3.7 MeV and the (31-, 03+, 03+, 23+) triplet at about 5.2 MeV are also investigated within the context of the shell model. In order to explain the scattering to natural parity states [those with angular momentum J and parity (-1)J], one must enhance the theoretical results by about the same factor as needed to explain the B(EJ);0J transition rates obtained from electromagnetic excitation. The sensitivity of the results to the isoscalar or isovector character of this enhancement is examined. Agreement between distorted-wave impulse approximation calculations and experiment is found to be satisfactory.

NUCLEAR REACTIONS, NUCLEAR STRUCTURE (π,π) Eπ164 MeV; O18 target, theoretical dσdΩ based on DWIA in momentum space; effects of different shell model descriptions studied.


  • Received 28 September 1979
  • Published in the issue dated February 1980

© 1980 The American Physical Society

Authors & Affiliations

T. -S. H. Lee and R. D. Lawson

  • Argonne National Laboratory, Argonne, Illinois 60439

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