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

Author: Thiessen, Henry Archer

Year: 1967

Degree: Dissertation (Ph.D.)

Advisor: Walker, Robert Lee

Committee Member: Unknown, Unknown

Option: Physics; Economics

DOI: 10.7907/A91P-5Z84

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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