Abstract
The absolute differential cross section for the (p,γHe reaction has been measured at =90° for =2.0–15.0 MeV, corresponding to photon energies =21.3–31.1 MeV. The present results are 35% lower than previously measured (p,γ) cross sections and are in excellent agreement with recent (γ,p) data obtained with monoenergetic photons. Comparing our results to current photoneutron cross sections gives a ratio σ(γ,p)/σ(γ,n)=1.09±0.17 for =24–31 MeV. This ratio is consistent with conventional theoretical predictions, indicating that no charge-symmetry violation in is required.
- Received 26 April 1990
DOI:https://doi.org/10.1103/PhysRevC.42.R1167
©1990 American Physical Society