The photoproton reaction of 25Mg

Abstract

The proton yields from the 25Mg(e, p) reaction have been measured for E p > 3 MeV, at θ = 90°, using an enriched 25Mg sample in the electron energy range 15–28 MeV. Partial photoproton cross sections to the ground and excited states in 24Na have been deduced and a lower limit is placed on the 25Mg(γ, np) cross section. The derived photoproton cross section combined with existing photoneutron data allows the 25Mg absorption cross section to be estimated. Configuration splitting of the 25Mg GDR is confirmed, and the effects of isospin splitting are considered.