Abstract
The total neutron yield from the (γ, n) reaction in hydrogen has been measured as a function of the energy of the primary electron using the bremsstrahlung beam from the Orsay Linear Electron Accelerator. The yield has been interpreted as a contribution from single and double pion photoproduction in hydrogen. Close to threshold the results are consistent with the theoretical prediction of CGLN for single pion photoproduction. In the energy region (250÷450) MeV the results are consistent with the experimentally measured values of the total positivepion photoproduction cross-section. At higher energies the results indicate a higher yield than previously anticipated for double pion photoproduction in the particular channel γ+p→n+π++π0.
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