Direct measurement of the 19F(p,α)16O reaction using the LHASA detector array

The low-energy 19 F(p, α α ) 16 O reaction has significant implications for nuclear astrophysics. The 19 F(p, α α ) 16 O reaction occurs via three channels: (p, α ₀ α 0 ), (p, α _π α π ), and (p, α _γ α γ ). At lower temperatures, below 0.15 GK, the (p, α ₀ α 0 ) channel is the dominant contributor of the reaction. The 19 F(p, α ₀ α 0 ) 16 O reaction cross section in the energy range of 400–900 keV was studied in this work. Recent data in the literature reveals a roughly 1.4 increase compared to prior findings reported in the NACRE (Nuclear Astrophysics Compilation of REactions) compilation. Therefore, we present new additional result of the study published in EPJA [22] employing a silicon strip detector array (LHASA - Large High-resolution Array of Silicon for Astrophysics). The anguar distributions, the reaction cross sections and the astrophysical S-factors of the (p, α ₀ α 0 ) channel were obtained through this experiment. Our findings resolve the discrepancies that exist between the two previously available data sets in the literature.