Multi-alpha Boson Gas state in Fusion Evaporation Reaction and Three-body Force

Taofeng Wang; Ziming Li; R. B. Wiringa; Minliang Liu; Jiansong Wang; Yanyun Yang; Qinghua He; Zhiyu Sun; Chengjian Lin; M. Assié; Y. Ayyad; D. Beaumel; Zhen Bai; Fangfang Duan; Zhihao Gao; Song Guo; Yue Hu; Wei Jiang; F. Kobayashi; Chengui Lu; Junbing Ma; Peng Ma; P. Napolitani; G. Verde; Jianguo Wang; Xianglun Wei; Guoqing Xiao; Hushan Xu; Biao Yang; Runhe Yang; Yongjin Yao; Chaoyue Yu; Junwei Zhang; Xing Zhang; Yuhu Zhang; Xiaohong Zhou

arXiv · 2310.04282

Multi-alpha Boson Gas state in Fusion Evaporation Reaction and Three-body Force

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Abstract

The experimental evidence for the $\alpha$ Boson gas state in the $^{11}$C+$^{12}$C$\rightarrow$$^{23}$Mg$^{\ast}$ fusion evaporation reaction is presented. By measuring the $\alpha$ emission spectrum with multiplicity 2 and 3, we provide insight into the existence of a three-body force among $\alpha$ particles. The observed spectrum exhibited distinct tails corresponding to $\alpha$ particles emitted in pairs and triplets consistent well with the model-calculations of AV18-UX and chiral effective field theory of NV2-3-la*, indicating the formation of $\alpha$ clusters with three-body force in the Boson gas state.

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Taofeng Wang, Ziming Li, R. B. Wiringa, Minliang Liu, Jiansong Wang, Yanyun Yang, Qinghua He, Zhiyu Sun, Chengjian Lin, M. Assié, Y. Ayyad, D. Beaumel, Zhen Bai, Fangfang Duan, Zhihao Gao, Song Guo, Yue Hu, Wei Jiang, F. Kobayashi, Chengui Lu, Junbing Ma, Peng Ma, P. Napolitani, G. Verde, Jianguo Wang, Xianglun Wei, Guoqing Xiao, Hushan Xu, Biao Yang, Runhe Yang, Yongjin Yao, Chaoyue Yu, Junwei Zhang, Xing Zhang, Yuhu Zhang, Xiaohong Zhou. 2023-10-06. Multi-alpha Boson Gas state in Fusion Evaporation Reaction and Three-body Force. https://arxiv.org/abs/2310.04282

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