Measurement of the 18 O( α , γ ) 22 Ne resonances at JUNA

22 Ne( α , n ) 25 Mg is one of the main neutron sources of the s process. 22 Ne is produced by the 14 N( α , γ ) 18 F( β + ) 18 O( α , γ ) 22 Ne reaction chain in the helium burning, thus, the production rate of 22 Ne is dominated by 14 N( α , γ ) 18 F and 18 O( α , γ ) 22 Ne. At the astrophysical relevant temperatures, the 18 O( α , γ ) 22 Ne reaction rates are determined by several low-energy resonances. In this work, the 18 O( α , γ ) 22 Ne reaction was measured at the 400 kV accelerator of Jinping Underground Nuclear Astrophysics experiment (JUNA). The γ -ray yields of the resonances between 470 to 770 keV were obtained.