The level scheme above the proton threshold in 26Si is crucial for evaluating the 25Al(p, γ)26Si
stellar reaction, which is important for understanding the astrophysical origin of the long-lived cosmic
radioactivity 26Al (T1/2 = 7.17 × 105 y) in the Galaxy. The excited states in 26Si have been studied using
an in-beam γ-ray spectroscopy technique with the 24Mg(3He, nγ)26Si reaction. γ-rays with energies up to
4.6MeV emitted from excited states in 26Si have been measured using large volume HPGe detectors. The
spin-parity of one of the most important states reported recently at 5890.0 keV has been assigned as 0+
by γ-γ angular correlation measurements in this work.