Proton capture reactions on Mg isotopes are significant in the Mg-Al cycle in stellar H-burning. In particular, the resonance strengths and branching ratios of low-energy resonances in ²⁵Mg( )²⁶Al reactions determine the production of ²⁶Al, which is one of the most important long-lived radioactive nuclei in nuclear astrophysics. In this article, we report our first experiment using the intense proton beam of approximately 2 mA provided by the JUNA accelerator ground laboratory and a new technique that can minimize the composition change of targets under intense beam irradiation. The resonance strengths and branching ratios of E = 214, 304, and 326 keV resonances in the reactions of ²⁴Mg( )²⁵Al, ²⁵Mg( )²⁶Al, and ²⁶Mg( )²⁷Al, respectively, were measured with high accuracy. The success of this experiment provides a good calibration for the nuclear astrophysical experiment at the Jinping underground laboratory.

Mg同位素上的质子俘获反应在恒星H燃烧的Mg-Al循环中很重要。特别是²⁵ Mg( ) ²⁶ Al 反应中低能共振的共振强度和支化率决定了²⁶ Al的产生，²⁶ Al 是核天体物理学中最重要的长寿命放射性核之一。在本文中，我们报告了我们使用 JUNA 加速器地面实验室提供的约 2 mA 强质子束和一种新技术的第一次实验，该技术可以在强束辐照下最大限度地减少目标的成分变化。E = 214、304 和 326 keV 共振的共振强度和支化率分别以高精度测量了²⁴ Mg( ) ²⁵ Al、²⁵ Mg( ) ²⁶ Al 和²⁶ Mg( ) ²⁷ Al。本次实验的成功为锦屏地下实验室的核天体物理实验提供了良好的标定。