Abstract
Absorption cross-sections of Carbon, Iron and Lead for high energy negative pions and protons have been measured with a multiplate expansion cloud chamber exposed to beams from the Brookhaven Cosmotron. The results are compared to an optical model computation assuming a nuclear potential distribution with the form of the charge density distribution indicated by electron scattering experiments. The measured cross-sections appear to agree with the ones deduced using this model from the known values of the free pion-nucleon and proton-nucleon total cross-sections.
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