The 25Mg(p, γ)26Al and 25Mg(p, p′) resonances for Ep = 0.31–1.84 MeV

Abstract Thin target yield curves with good statistics have been measured for the 25 Mg(p, γ) 26 Al and 25 Mg(p, p′) 25 Mg reactions in the E p = 310–1845 keV region. Altogether 76 resonances have been observed, of which 45 only in (p, γ), 30 in both (p, γ) and (p, p′), and one only in (p, p′). Several of these resonances had not been observed previously in either of the two reactions, and several of the previously observed resonances turned out to be doublets. All 39 25 Mg(p, p 0 ) 25 Mg resonances found previously in the E p = 700–1845 keV region resonate in (p, γ) and many also in (p, p′). Resonance strengths have been derived relative to that of the E p = 593 keV resonance. The analysis of weak (p, p 1 ) and (p, p 2 ) resonance yields has been supported by a calculation of the yields in the continuum (in between resonances) due to the Breit-Wigner tails of strong and broad resonances in the neighbourhood (with interference between resonances with the same J π ; T taken into account), and to Coulomb excitation.