High resolution investigation of the 26Mg(p,p)26Mg reaction

Abstract

Differential cross sections for elastic scattering of protons on 26Mg in the Ep = 1–2 MeV region, were measured with surface barrier counters at four angles. In this energy range 42 26Mg(p, γ) 27Al resonances are known. Of 19 (p, γ) resonances the corresponding 26Mg(p,p) 26Mg resonance was also observed; three (p,p) resonances were found which had no (p, γ) counterpart. The measured widths range from 6 keV down to 6 eV. The spins of 14 of these resonances and the proton orbital momenta of 20 resonances could be determined unambiguously. Partial widths for proton and γ-ray emission are computed from the observed widths and the (p, γ) yields. Upper limits are given for the widths of unobserved resonances.