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Measurement of 19F(p, γ)20Ne reaction suggests CNO breakout in first stars.
Zhang, Liyong; He, Jianjun; deBoer, Richard J; Wiescher, Michael; Heger, Alexander; Kahl, Daid; Su, Jun; Odell, Daniel; Chen, Yinji; Li, Xinyue; Wang, Jianguo; Zhang, Long; Cao, Fuqiang; Zhang, Hao; Zhang, Zhicheng; Jiang, Xinzhi; Wang, Luohuan; Li, Ziming; Song, Luyang; Zhao, Hongwei; Sun, Liangting; Wu, Qi; Li, Jiaqing; Cui, Baoqun; Chen, Lihua; Ma, Ruigang; Li, Ertao; Lian, Gang; Sheng, Yaode; Li, Zhihong; Guo, Bing; Zhou, Xiaohong; Zhang, Yuhu; Xu, Hushan; Cheng, Jianping; Liu, Weiping.
Affiliation
  • Zhang L; Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, China.
  • He J; Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, China. hejianjun@bnu.edu.cn.
  • deBoer RJ; Nuclear Science Laboratory, University of Notre Dame, Notre Dame, IN, USA.
  • Wiescher M; Nuclear Science Laboratory, University of Notre Dame, Notre Dame, IN, USA. michael.c.wiescher.1@nd.edu.
  • Heger A; School of Physics and Astronomy, Monash University, Victoria, Australia.
  • Kahl D; Extreme Light Infrastructure - Nuclear Physics, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH), Bucharest-Magurele, Romania.
  • Su J; Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, China.
  • Odell D; Institute of Nuclear and Particle Physics and Department of Physics and Astronomy, Ohio University, Athens, OH, USA.
  • Chen Y; Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, China.
  • Li X; Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, China.
  • Wang J; Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.
  • Zhang L; China Institute of Atomic Energy, Beijing, China.
  • Cao F; China Institute of Atomic Energy, Beijing, China.
  • Zhang H; Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, China.
  • Zhang Z; College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, China.
  • Jiang X; Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, China.
  • Wang L; Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, China.
  • Li Z; Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, China.
  • Song L; Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, China.
  • Zhao H; Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.
  • Sun L; Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.
  • Wu Q; Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.
  • Li J; Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.
  • Cui B; China Institute of Atomic Energy, Beijing, China.
  • Chen L; China Institute of Atomic Energy, Beijing, China.
  • Ma R; China Institute of Atomic Energy, Beijing, China.
  • Li E; College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, China.
  • Lian G; China Institute of Atomic Energy, Beijing, China.
  • Sheng Y; Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, China.
  • Li Z; China Institute of Atomic Energy, Beijing, China.
  • Guo B; China Institute of Atomic Energy, Beijing, China.
  • Zhou X; Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.
  • Zhang Y; Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.
  • Xu H; Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.
  • Cheng J; Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, China.
  • Liu W; China Institute of Atomic Energy, Beijing, China. wpliu@ciae.ac.cn.
Nature ; 610(7933): 656-660, 2022 10.
Article in En | MEDLINE | ID: mdl-36289385
ABSTRACT
Proposed mechanisms for the production of calcium in the first stars (population III stars)-primordial stars that formed out of the matter of the Big Bang-are at odds with observations1. Advanced nuclear burning and supernovae were thought to be the dominant source of the calcium production seen in all stars2. Here we suggest a qualitatively different path to calcium production through breakout from the 'warm' carbon-nitrogen-oxygen (CNO) cycle through a direct experimental measurement of the 19F(p, γ)20Ne breakout reaction down to a very low energy point of 186 kiloelectronvolts, reporting a key resonance at 225 kiloelectronvolts. In the domain of astrophysical interest2, at around 0.1 gigakelvin, this thermonuclear 19F(p, γ)20Ne rate is up to a factor of 7.4 larger than the previous recommended rate3. Our stellar models show a stronger breakout during stellar hydrogen burning than previously thought1,4,5, and may reveal the nature of calcium production in population III stars imprinted on the oldest known ultra-iron-poor star, SMSS0313-67086. Our experimental result was obtained in the China JinPing Underground Laboratory7, which offers an environment with an extremely low cosmic-ray-induced background8. Our rate showcases the effect that faint population III star supernovae can have on the nucleosynthesis observed in the oldest known stars and first galaxies, which are key mission targets of the James Webb Space Telescope9.
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Full text: 1 Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Nature Year: 2022 Type: Article Affiliation country: China
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Full text: 1 Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Nature Year: 2022 Type: Article Affiliation country: China