Direct measurement of the resonance strengths and branching ratios of low-energy(p,γ)reactions on Mg isotopes

• 作者: Hao Zhang Zhi-Hong Li Jun Su Yun-Ju Li Chen Chen Long Zhang Fu-Qiang Cao Yang-Ping Shen Wei Nan Wei-Ke Nan Xin-Yue Li Li-Hua Chen Gang Lian Bao-Qun Cui Bing Guo Wei-Ping Liu
• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: NUCLEAR PHYSICS
• 页码范围: 132-138
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1137/ac06aa

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 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.