Abstract
We remeasured with improved techniques the positive-pion photoproduction yield on near threshold and up to 7.2 MeV above it. If the total cross section of the reaction is expressed as , our result for the reaction near threshold is where is the pion and the photon c.m. momenta expressed in units of MeV/c. Deviations from this expression above threshold and the contribution of (1.8 MeV) were also observed. The full understanding of this result requires further theoretical work and complementary experiments on the nuclear system.
NUCLEAR REACTIONS and (1.8 MeV), MeV, measured relative to proton target.
- Received 13 December 1976
DOI:https://doi.org/10.1103/PhysRevC.15.1415
©1977 American Physical Society