【摘 要】
：
Proton capture reactions on Mg isotopes are significant in the Mg-Al cycle in stellar H-burning.In par-ticular,the resonance strengths and branching ratios of low-energy resonances in 25Mg(p,γ)26A1 reactions determine the production of 26Al,which is one o
【机 构】
：
China Institute of Atomic Energy,Beijing 102413,China;China Institute of Atomic Energy,Beijing 10241
论文部分内容阅读
Proton capture reactions on Mg isotopes are significant in the Mg-Al cycle in stellar H-burning.In par-ticular,the resonance strengths and branching ratios of low-energy resonances in 25Mg(p,γ)26A1 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 un-der intense beam irradiation.The resonance strengths and branching ratios of E=214,304,and 326 keV resonances in the reactions of 24Mg(p,γ)25Al,25Mg(p,γ)26Al,and 26Mg(p,γ)27Al,respectively,were measured with high accur-acy.The success of this experiment provides a good calibration for the nuclear astrophysical experiment at the Jin-ping underground laboratory.
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