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

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Abstract The low-energy 19F(p, $$\alpha $$ α )16O reaction has significant implications for nuclear astrophysics. The 19F(p, $$\alpha $$ α )16O reaction occurs via three channels: (p, $$\alpha _0$$ α 0 ), (p, $$\alpha _\pi $$ α π ), and (p, $$\alpha _\gamma $$ α γ ). At lower temperatures, below 0.15 GK, the (p, $$\alpha _0$$ α 0 ) channel is the dominant contributor of the reaction. The 19F(p, $$\alpha _{0}$$ α 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, $$\alpha _0$$ 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.

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