The Photonuclear Giant Resonance in Silicon?28

Abstract

The 90° yields of ?-rays from the reaction 27Al(p,?)28Si have been obtained at intervals of 40 keV for proton energies between 8·02 and 10·42 MeV. The ground state y-ray (?o) and the first excited state y-ray (?l) were adequately resolved. The two yield curves show considerable structure and, with the present resolution, there is a strong one-way correspondence between them. The gross structure of the ?o yield curve is compared with data from the 28Si(?,n)27Si reaction and fair agreement is found.