Charged photoparticles from the 18O giant resonance

Abstract

Emission of charged photoparticles from the 18O giant E1 resonance region was investigated at the University of Giessen electron linac at bremsstrahlung endpoint energies of 24 and 32 MeV. Spectra of protons, deuterons, tritons and α-particles were measured at six angles. Proton decay shows strong transitions to excited states in 17N. Deuterons and tritons have a nearly isotropic angular distribution. The 18O( γ, t 0) 15N and the 18O( γ, α 0) 14C cross sections are determined in the giant E1 resonance region. E1 and E2 18O( γ, α 0 14C cross sections are derived from the angular distribution measurement.