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

¹ Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China
² Beijing Radiation Center, Beijing 100875, China
³ China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China

^* e-mail: sujun@bnu.edu.cn

Published online: 24 February 2022

Abstract

²²Ne(α,n)²⁵Mg is one of the main neutron sources of the s process. ²²Ne is produced by the ¹⁴N(α, γ)¹⁸F(β⁺)¹⁸O(α, γ)²²Ne reaction chain in the helium burning, thus, the production rate of ²²Ne is dominated by ¹⁴N(α,γ)¹⁸F and ¹⁸O(α,γ)²²Ne. At the astrophysical relevant temperatures, the ¹⁸O(α,γ)²²Ne reaction rates are determined by several low-energy resonances. In this work, the ¹⁸O(α,γ)²²Ne 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.