Study of level structure on 26Si for the astrophysical interest in 26Al production

A radio-isotope of ^26gAl (where g is expressing the ground state) is known as a γ-ray emitter spreading in the Milky Way galaxy. Since the half-life is only 7.2 × 10⁵ year this is the obvious evidence of ongoing nucleosynthesis in our galaxy. This isotope is also known as an origin of abundance-anomaly of ²⁶Mg observed in meteorites. Therefore, investigations of production rates for the ^26gAl are quite important for the nucleosynthesis occurring in massive star, classical nova and super nova. Although there is still some uncertainties in the nuclear structure of ²⁶Si which is located at the bypass sequence producing the isomeric state ^26mAl (where m is expressing the metastable 1 ^st excited state). For the comprehensive understanding of the nuclear reaction rate to produce the ^26gAl, we have done γ-ray spectroscopy to investigate the level structure for the ²⁶Si. We confirmed the presence of a recently proposed level located just above the proton threshold. Furthermore, as a result of the gamma-ray angular correlation measurements we could assign the spin of this level as 0⁺. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.