Neutrino oscillation physics with a higher γ β-beam

We demonstrate the excellent physics case of a β –beam facility in which the radioactive 6 He ions producing anti-neutrinos are accelerated to γ ∼ 150 while the 18 Ne ions producing neutrinos are accelerated to γ ∼ 250 . We assume a baseline of 300 km. The interest of this scenario stands in the fact that it corresponds to the maximum acceleration that can be achieved by the SPS at CERN, and it could be realized without major technological challenges.