New cross sections for the 27Al(p,x)7Be nuclear process: Monitoring proton beam energy via the 22Na/7Be cross-section ratio between 45 and 200 MeVFerenc Szelecsényi, Gideon Francois Steyn, Francois Meiring Nortier and Zoltán KovácsEPJ Web Conf., 146 (2017) 08011DOI: https://doi.org/10.1051/epjconf/201714608011