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

Abstract

The low-energy ¹⁹F(p,\(\alpha \))¹⁶O reaction has significant implications for nuclear astrophysics. The ¹⁹F(p, \(\alpha \))¹⁶O reaction occurs via three channels: (p,\(\alpha _0\)), (p,\(\alpha _\pi \)), and (p,\(\alpha _\gamma \)). At lower temperatures, below 0.15 GK, the (p,\(\alpha _0\)) channel is the dominant contributor of the reaction. The ¹⁹F(p,\(\alpha _{0}\))¹⁶O 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,\(\alpha _0\)) channel were obtained through this experiment. Our findings resolve the discrepancies that exist between the two previously available data sets in the literature.