π⁺ Photoproduction at Angles from 50° to 165° CM. and Energies from 500 to 1350 MeV

Citation

Thiessen, Henry Archer (1967) π⁺ Photoproduction at Angles from 50° to 165° CM. and Energies from 500 to 1350 MeV. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/A91P-5Z84. https://resolver.caltech.edu/CaltechETD:etd-10042002-155413

Abstract

The cross section for the reaction γ + p → π⁺ + n was measured at the Caltech synchrotron. The π⁺ was detected in a multichannel magnetic spectrometer, and the data were recorded in the memory of a pulse height analyzer. The results are presented in the form of energy distributions at 12 fixed laboratory angles from 34° to 155°. cross section measurements are reported with photon energies between 500 MeV and 1350 MeV. No detailed fitting of the entire angular range was attempted; however, a narrow bump in the cross section at 180° is explained as the effect of a cusp at the eta meson threshold.

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