First Direct Measurement of at Stellar Energies
- Univ. of Notre Dame, IN (United States). Inst. for Structure and Nuclear Astrophysics, Joint Inst. for Nuclear Astrophysics; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Chinese Academy of Sciences (CAS), Lanzhou (China). Inst. of Modern Physics
- Univ. of Notre Dame, IN (United States). Inst. for Structure and Nuclear Astrophysics, Joint Inst. for Nuclear Astrophysics
- Monash Univ., Melbourne, VIC (Australia). Monash Center for Astrophysics, School of Physics and Astronomy; Shanghai Jiao-Tong Univ., Shanghai (China). Dept. of Physics and Astronomy; Univ. of Minnesota, Minneapolis, MN (United States). School of Physics and Astronomy
- China Inst. of Atomic Energy, Beijing (China)
- Hungarian Academy of Sciences, Budapest (Hungary). Konkoly Observatory, Research Centre for Astronomy and Earth Sciences; Univ. of Basel (Switzerland). Dept. of Physics
- Univ. of California, Santa Cruz, CA (United States). Dept. of Astronomy and Astrophysics
Neutrons produced by the carbon fusion reaction 12C(12C,n)23Mg play an important role in stellar nucleosynthesis. However, past studies have shown large discrepancies between experimental data and theory, leading to an uncertain cross section extrapolation at astrophysical energies. Here in this paper, we present the first direct measurement that extends deep into the astrophysical energy range along with a new and improved extrapolation technique based on experimental data from the mirror reaction 12C(12C,p)23Na . The new reaction rate has been determined with a well-defined uncertainty that exceeds the precision required by astrophysics models. Using our constrained rate, we find that 12C (12C,n)23Mg is crucial to the production of Na and Al in pop-III pair instability supernovae. It also plays a nonnegligible role in the production of weak s -process elements, as well as in the production of the important galactic γ-ray emitter 60Fe.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE; National Science Foundation (NSF); National Natural Science Foundation of China (NSFC)
- Grant/Contract Number:
- AC52-07NA27344; PHY-0758100; PHY-0822648; 11021504; 11321064; 11475228; 11490564; FT120100363
- OSTI ID:
- 1234609
- Alternate ID(s):
- OSTI ID: 1198533
- Report Number(s):
- LLNL-JRNL-668674; PRLTAO
- Journal Information:
- Physical Review Letters, Vol. 114, Issue 25; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Mean-field description of heavy-ion scattering at low energies and fusion
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journal | November 2018 |
An efficient method for mapping the $${}^{12}\hbox {C}+{}^{12}\hbox {C}$$12C+12C molecular resonances at low energies
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journal | July 2019 |
Spectrum tailoring of low charge-to-mass ion beam by the triple-stage acceleration mechanism
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journal | April 2019 |
Nuclear physics of the outer layers of accreting neutron stars
|
journal | July 2018 |
Nuclear Physics of the Outer Layers of Accreting Neutron Stars | text | January 2018 |
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