Mengoni, A. and Damone, L. A. and Barbagallo, M. and Mastromarco, M. and Cosentino, L. (2019) Exploring neutron channel solutions at CERN/n TOF for the Cosmological Lithium Problem. Il nuovo cimento C, 42 (2-3). pp. 1-4. ISSN 1826-9885
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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 performed at CERN/n TOF. High purity 7Be material was produced at the Paul Scherrer Institute (PSI) and implanted at CERN/ISOLDE, demonstrating the feasibility of neutron measurements on samples produced at radioactive beam facilities. The cross sections are significantly higher than previously determined, at low energies. 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 (CLiP). The two n TOF measurements can finally rule out neutron-induced reactions as a potential explanation of the CLiP, leaving all alternative physics and astronomical scenarios still open.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 01 Dec 2020 08:45 |
| Last Modified: | 01 Dec 2020 08:45 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/20523 |
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