Direct measurement of the break-out ^(19)F(p,γ)^(20)Ne reaction in the China Jinping underground laboratory(CJPL)

作     者：Yin‑Ji Chen Hao Zhang Li‑Yong Zhang Jian‑Jun He Richard James deBoer Michael Wiescher Alexander Heger David Kahl Jun Su Daniel Odell Xin‑Yue Li Jian‑Guo Wang Long Zhang Fu‑Qiang Cao Zhi‑Cheng Zhang Xin‑Zhi Jiang Luo‑Huan Wang Zi‑Ming Li Lu‑Yang Song Liang‑Ting Sun Qi Wu Jia‑Qing Li Bao‑Qun Cui Li‑Hua Chen Rui‑Gang Ma Er‑Tao Li Gang Lian Yao‑De Sheng Zhi‑Hong Li Bing Guo Wei‑Ping Liu Yin-Ji Chen;Hao Zhang;Li-Yong Zhang;Jian-Jun He;Richard James deBoer;Michael Wiescher;Alexander Heger;David Kahl;Jun Su;Daniel Odell;Xin-Yue Li;Jian-Guo Wang;Long Zhang;Fu-Qiang Cao;Zhi-Cheng Zhang;Xin-Zhi Jiang;Luo-Huan Wang;Zi-Ming Li;Lu-Yang Song;Liang-Ting Sun;Qi Wu;Jia-Qing Li;Bao-Qun Cui;Li-Hua Chen;Rui-Gang Ma;Er-Tao Li;Gang Lian;Yao-De Sheng;Zhi-Hong Li;Bing Guo;Wei-Ping Liu

作者机构：Key Laboratory of Beam Technology of the Ministry of EducationCollege of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Department of Physics and AstronomyThe Joint Institute for Nuclear AstrophysicsUniversity of Notre DameNotre DameIN 46556USA School of Physics and AstronomyMonash UniversityClaytonVIC 3800Australia Facility for Rare Isotope BeamsMichigan State UniversityEast LansingMI 48824USA Institute of Nuclear and Particle Physics and Department of Physics and AstronomyOhio UniversityAthensOH 45701USA Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China China Institute of Atomic EnergyBeijing 102413China College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China School of Nuclear Science and TechnologyUniversity of Chinese Academy of SciencesBeijing 100049China College of ScienceSouthern University of Science and TechnologyShenzhen 518055China Institute of Radiation TechnologyBeijing Academy of Science and TechnologyBeijing 100875China Key Laboratory of Nuclear Physics and Ion‑Beam Application(MOE)Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Mathematics and PhysicsHandan UniversityHandan 056005China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2024年第35卷第8期

页      面：142-152页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.12075027,1232509,11961141004,and 12175152) the National Science Foundation(Nos.Phys-2011890 and Phy-1430152) 

主　　题：Nuclear astrophysics First stars Abundance of calcium Reaction cross section Reaction rate China Jinping underground laboratory(CJPL) JUNA 

摘      要：Calcium production and the stellar evolution of first-generation stars remain fascinating mysteries in *** one possible nucleosynthesis scenario,break-out from the hot carbon–nitrogen–oxygen(HCNO)cycle was thought to be the source of the calcium observed in these oldest ***,according to the stellar modeling,a nearly tenfold increase in the thermonuclear rate ratio of the break-out ^(19)F(p,γ)^(20) Ne reaction with respect to the competing ^(19)F(p,α)^(16) O back-processing reaction is required to reproduce the observed calcium *** performed a direct measurement of this break-out reaction at the China Jinping underground *** measurement was performed down to the low-energy limit of E_(c.m.)=186 keV in the center-of-mass *** key resonance was observed at 225.2 keV for the first *** a temperature of approximately 0.1 GK,this new resonance enhanced the thermonuclear ^(19)F(p,γ)^(20) Ne rate by up to a factor of≈7.4,compared with the previously recommended NACRE *** is of particular interest to the study of the evolution of the first stars and implies a stronger breakdown in their“warmCNO cycle through the ^(19)F(p,γ)^(20) Ne reaction than previously *** break-out resulted in the production of the calcium observed in the oldest stars,enhancing our understanding of the evolution of the first stars.