Total yield measurements in 27Al(p, γ)28Si

Abstract

The reaction 27Al(p, γ)28Si has been investigated in the proton energy range 0.3-2.6 MeV to obtain data needed for a calculation of the 28Si photodisintegration rate in astrophysical situations. Total gamma-ray strengths were determined for 85 resonances. From 1.4-2.6 MeV a yield curve was measured and an upper limit for the nonresonant cross section was determined. Where possible, resonance widths were deduced from the data. The gamma-ray detection efficiencies and target purity were investigated experimentally. Comparison was made with resonance strengths, measured by other methods, in the reactions 30Si(p, γ)31P and 26Mg(p, γ)27Al. The 28Si photodisintegration rates, calculated from the present measurements, are given in the following paper. © 1969.