Photoproduction of Mesons from Hydrogen and Deuterium

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Abstract
The relative yields of positive pions produced from hydrogen and deuterium by the 340-Mev brems-strahlung beam of the Berkeley synchrotron have been measured in the laboratory system at angles of 20, 40, and 60 deg, and at pion energies ranging from 45 to 145 Mev. The ratio of the relative yields of pions from deuterium and hydrogen was roughly constant as a function of angle, but decreased monotonically with pion energy from a value of 0.90±0.05 at 45 Mev to a value of 0.55±0.07 at 145 Mev.