Photoproduction of pi�� mesons from He3 with 340 MeV bremsstrahlung
"Cross sections for the coherent photoproduction of 71""0 mesons from He3(gammaHe3 -> pi°He 3) were measured for recoil angles of 200, 300, 400, and 500 from the direction of the incident photon. A gaseous He3 target was irradiated by 340 MeV bremsstrahlung; provided by the 'University of Illinois betatron. The He3 gas was maintained at liquid hydrogen temperature and at a pressure of slightly above one atmosphere. The recoil nuclei were observed with silicon semiconductor detectors. At least one gamma ray from the pion decay was detected with a lead glass Cherenkov counter. A coincidence between a semiconductor detector and the Cherenkov counter triggered an oscilloscope on which all pulses were then displayed and photographed. These photographs constitute the experimental data."
pi mesons, bremsstrahlung, photoproduction, coherent photoproduction, recoil angles
University of Illinois - Urbana-Champaign
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