[en] Differential cross sections for elastic scattering of pions by deuterons have been measured for centre-of-mass angles between 1300 and 1750, and at laboratory energies 141, 177, and 260 MeV for π+, and at 151, 185, and 189 MeV for π-. At 177 and 260 MeV the cross sections are a factor of 2 lower than the predictions of three-body theories. (orig.)
Journal
Phys. Lett., B; ISSN 0370-2693; 
; v. 94(3); p. 323-326
; v. 94(3); p. 323-326
[en] Multiwire proportional chambers (MWPCs) and adjustable-field drift chambers (AFDCs) have been constructed for the Omicron spectrometer sited at the CERN Synchro-cyclotron. The MWPCs are of 1 mm pitch and have a useful area of 1282 mm2. The useful area of the AFDCs varies from 390 X 338 mm2 to 650 X 850 mm2 and the cell length from 26 to 50 mm. A resolution of (150 +- 30)μm has been obtained in a magnetic field of about 1 T. The characteristics and the tests of these chambers will be described. (Auth.)
Journal
Nuclear Instruments and Methods; ISSN 0029-554X; ; v. 156(1-2); p. 187-197
; v. 156(1-2); p. 187-197
[en] 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 MeV π+p and 185 MeV π-p backward cross-sections are also presented and compared with cross-sections calculated from known phase shifts. (orig.)
Journal
Nuclear Instruments and Methods; ISSN 0029-554X; ; v. 177(2/3); p. 369-379
; v. 177(2/3); p. 369-379