[en] Differential cross-section of proton induced γ-ray emission from the reactions "2"4Mg(p,p′γ)"2"4Mg (E_γ = 1369 keV), "2"5Mg(p,p′γ)"2"5Mg (E_γ = 390, 585, 975 keV) and "2"6Mg(p,γ)"2"7Al (E_γ = 1014 keV) were measured for proton energies from 1 to 3 MeV using a 60 μg/cm"2 Mg target evaporated on a 40 μg/cm"2 Ag thin film. The γ-rays were collected by a 50% relative efficiency HPGe detector placed at an angle of 90° with respect to the beam direction, while the backscattered protons were collected by an ion implanted Si detector placed at a scattering angle of 165°. Simultaneous collection of γ-ray and RBS spectra is a great advantage of this approach which makes differential cross-section measurements independent on the collected beam charge. Measured cross-section values were compared with the previously reported data in the literature. Absolute γ-ray differential cross-sections were obtained with an overall systematic uncertainty of about ±6% and statistical uncertainty of less than ±5% for proton energies higher than 2.24 MeV.