Abstract
The production of neutral pions has been studied in reactions of 35 MeV/nucleon NAl,Ni,W and 25 MeV/nucleon OAl,Ni. Inclusive pion differential distributions dσ/, dσ/dΩ, dσ/dy, dσ/, and σ/dy have been measured by detecting the two pion-decay γ rays in a setup of 20 lead glass Čerenkov detector telescopes. Special care was taken to understand and suppress background events. Effects of pion reabsorption are discussed and it is found that the cross sections presented here are substantially affected by such final state interactions. The comparatively large experimental cross sections and the shape of the spectral distributions cannot be accounted for in single nucleon-nucleon collision or statistical models; they rather call for a coherent pion production mechanism.
- Received 19 November 1985
DOI:https://doi.org/10.1103/PhysRevC.33.1420
©1986 American Physical Society