A simple, large-solid-angle apparatus, specially suited for the measurement of backward elastic scattering of medium-energy pions on protons and deuterons, is described. The method of analysis which reduces background and determines elastic events from a data sample of 185 MeV negative pions incident on a D2O target is discussed. Results for 141 MeVπ+pand 185 MeVπ−p backward cross-sections are also presented and compared with cross-sections calculated from known phase shifts.
OPERATION AND PERFORMANCE OF A SYSTEM FOR pi p AND pi d BACKWARD SCATTERING
BRESSANI, Tullio;CHIAVASSA, Emilio Luciano;GALLIO, Mauro;
1980-01-01
Abstract
A simple, large-solid-angle apparatus, specially suited for the measurement of backward elastic scattering of medium-energy pions on protons and deuterons, is described. The method of analysis which reduces background and determines elastic events from a data sample of 185 MeV negative pions incident on a D2O target is discussed. Results for 141 MeVπ+pand 185 MeVπ−p backward cross-sections are also presented and compared with cross-sections calculated from known phase shifts.
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