Abstract

The production of neutral pions has been studied in the 16O+ 27Al, 58Ni, 208Pb reactions at 95 MeV/nucleon. Inclusive pion differential distributions dσ dp t , dσ dT π , and dσ dΩ have been measured by detecting the two-pion decay γ-rays in a setup of 8 lead glass Cherenkov detector telescopes. The data are discussed in the framework of a moving thermal source model. It is shown that the shape of the pion energy spectra is better described if mean field effects on the primary pion-production cross section and pion reabsorption are included in the calculation.

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