Astrophysically important 26Si states studied with the 28Si(4He, 6He) 26Si reaction

The emission of a 1.809-MeV γ-ray from the first excited state of ²⁶Mg, followed by β-decay of ²⁶Al in its ground state (denoted as ²⁶Al^g.s.), has been identified by several gamma-ray telescopes. To resolve the controversy over the possible sources of the observational 1.809-MeV γ-rays, one needs accurate knowledge of the production rate of ²⁶Al^g.s.. The ²⁵Al(p, γ)²⁶Si reaction is one of the most important astrophysical reactions to be …