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

Chen, Yin-Ji1; Zhang, Hao1; Zhang, Li-Yong1,11; He, Jian-Jun1,12; Deboer, Richard James2; Wiescher, Michael2; Heger, Alexander3; Kahl, David4; Su, Jun1,11; Odell, Daniel5; Li, Xin-Yue1; Wang, Jian-Guo6; Zhang, Long7; Cao, Fu-Qiang7; Zhang, Zhi-Cheng8; Jiang, Xin-Zhi1; Wang, Luo-Huan1,13; Li, Zi-Ming1; Song, Lu-Yang1; Sun, Liang-Ting6,9; Wu, Qi6; Li, Jia-Qing6; Cui, Bao-Qun7; Chen, Li-Hua7; Ma, Rui-Gang7; Li, Er-Tao8; Lian, Gang7; Sheng, Yao-De1; Li, Zhi-Hong7; Guo, Bing7; Liu, Wei-Ping7,10

2024-08-01

10.1007/s41365-024-01531-0

NUCLEAR SCIENCE AND TECHNIQUES   影响因子和分区

1001-8042

2210-3147

Calcium production and the stellar evolution of first-generation stars remain fascinating mysteries in astrophysics. As 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 stars. However, according to the stellar modeling, a nearly tenfold increase in the thermonuclear rate ratio of the break-out F-19(p, gamma)Ne-20 reaction with respect to the competing F-19(p,alpha)16O back-processing reaction is required to reproduce the observed calcium abundance. We performed a direct measurement of this break-out reaction at the China Jinping underground laboratory. The measurement was performed down to the low-energy limit of E-c.m. = 186 keV in the center-of-mass frame. The key resonance was observed at 225.2 keV for the first time. At a temperature of approximately 0.1 GK, this new resonance enhanced the thermonuclear F-19(p, gamma)Ne-20 rate by up to a factor of approximate to 7.4, compared with the previously recommended NACRE rate. This is of particular interest to the study of the evolution of the first stars and implies a stronger breakdown in their "warm" CNO cycle through the F-19(p, gamma)Ne-20 reaction than previously envisioned. This break-out resulted in the production of the calcium observed in the oldest stars, enhancing our understanding of the evolution of the first stars.

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

SCI ; EI

英语

通讯

National Natural Science Foundation of China["12075027","1232509","11961141004","12175152"] ; National Science Foundation["Phys-2011890","Phy-1430152"]

Nuclear Science & Technology ; Physics

Nuclear Science & Technology ; Physics, Nuclear

WOS:001292117000001

SPRINGER SINGAPORE PTE LTD

Web of Science

1.Beijing Normal Univ, Coll Nucl Sci & Technol, Key Lab Beam Technol, Minist Educ, Beijing 100875, Peoples R China
2.Univ Notre Dame, Joint Inst Nucl Astrophys, Dept Phys & Astron, Notre Dame, IN 46556 USA
3.Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia
4.Michigan State Univ, Facil Rare Isotope Beams, E Lansing, MI 48824 USA
5.Ohio Univ, Inst Nucl & Particle Phys, Dept Phys & Astron, Athens, OH 45701 USA
6.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
7.China Inst Atom Energy, Beijing 102413, Peoples R China
8.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China
9.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China
10.Southern Univ Sci & Technol, Coll Sci, Shenzhen 518055, Peoples R China
11.Beijing Acad Sci & Technol, Inst Radiat Technol, Beijing 100875, Peoples R China
12.Fudan Univ, Inst Modern Phys, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200433, Peoples R China
13.Handan Univ, Sch Math & Phys, Handan 056005, Peoples R China

Chen, Yin-Ji,Zhang, Hao,Zhang, Li-Yong,et al. Direct measurement of the break-out ¹⁹F(p, γ)²⁰Ne reaction in the China Jinping underground laboratory (CJPL)[J]. NUCLEAR SCIENCE AND TECHNIQUES,2024,35(8).

Chen, Yin-Ji.,Zhang, Hao.,Zhang, Li-Yong.,He, Jian-Jun.,Deboer, Richard James.,...&Liu, Wei-Ping.(2024).Direct measurement of the break-out ¹⁹F(p, γ)²⁰Ne reaction in the China Jinping underground laboratory (CJPL).NUCLEAR SCIENCE AND TECHNIQUES,35(8).

Chen, Yin-Ji,et al."Direct measurement of the break-out ¹⁹F(p, γ)²⁰Ne reaction in the China Jinping underground laboratory (CJPL)".NUCLEAR SCIENCE AND TECHNIQUES 35.8(2024).