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Record link: 
http://hdl.handle.net/20.500.12708/141802
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Title: 
New reaction rates for the destruction of ⁷Be during big bang nucleosynthesis measured at CERN/n_TOF and their implications on the cosmological lithium problem
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Citation: 
Mengoni, A., Damone, L. A., Barbagallo, M., Bacak, M., Jericha, E., & n_TOF Collaboration, -. (2020). New reaction rates for the destruction of 7Be during big bang nucleosynthesis measured at CERN/n_TOF and their implications on the cosmological lithium problem. In ND 2019: International Conference on Nuclear Data for Science and Technology (Vol. 239). https://doi.org/10.1051/epjconf/202023907001
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Publisher DOI: 
10.1051/epjconf/202023907001
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Publication Type: 
Inproceedings - Full-Paper Contribution
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Authors: 
Mengoni, A. 
Damone, Lucia Anna 
Barbagallo, Massimo 
Bacak, Michael 
Jericha, Erwin 
n_TOF Collaboration, - 
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Organisational Unit: 
E141-04 - Forschungsbereich Neutron- and Quantum Physics 
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Published in: 
ND 2019: International Conference on Nuclear Data for Science and Technology 
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Volume: 
239
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Date (published): 
2020
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Event name: 
ND 2019: International Conference on Nuclear Data for Science and Technology 
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Event date: 
19-May-2019 - 24-May-2019
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Event place: 
Beijing, China
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Number of Pages: 
4
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Peer reviewed: 
Yes
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Keywords: 
General Earth and Planetary Sciences; General Environmental Science; General Engineering
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Abstract: 
New measurements of the ⁷Be(n,α)⁴He and ⁷Be(n,p)⁷Li reaction cross sections from thermal to keV neutron energies have been recently performed at CERN/n_TOF. Based on the new experimental results, astrophysical reaction rates have been derived for both reactions, including a proper evaluation of their uncertainties in the thermal energy range of interest for big bang nucleosynthesis studies. The new estimate of the ⁷Be destruction rate, based on these new results, yields a decrease of the predicted cosmological ⁷Li abundance insufficient to provide a viable solution to the cosmological lithium problem.
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Research Areas: 
Special and Engineering Materials: 20%
Materials Characterization: 60%
Modelling and Simulation: 20%
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Science Branch: 
Physik, Astronomie
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Appears in Collections:
Conference Paper

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