New reaction rates for the destruction of &lt;sup&gt;7&lt;/sup&gt;Be during big bang nucleosynthesis measured at CERN/n_TOF and their implications on the cosmological lithium problem

Mengoni, A.; Damone, L.A.; Barbagallo, M.; Aberle, O.; Alcayne, V.; Amaducci, S.; Andrzejewski, J.; Audouin, L.; Babiano-Suarez, V.; Bacak, M.; Dressler, R.; Heinitz, S.; Jiri, U.; Maugeri, E.; Rochman, D.; Schumann, D.; Sprung, P.; Žugec, P.

doi:10.1051/epjconf/202023907001

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

Mengoni A, Damone LA, Barbagallo M, Aberle O, Alcayne V, Amaducci S, Andrzejewski J, Audouin L, Babiano-Suarez V, Bacak M, Dressler R, Heinitz S, Jiri U, Maugeri E, Rochman D, Schumann D, Sprung P, Žugec P, et al.

Citation

Mengoni, A., Damone, L. A., Barbagallo, M., Aberle, O., Alcayne, V., Amaducci, S., … Žugec, P. (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 Z. Ge, N. Shu, Y. Chen, W. Wang, & H. Zhang (Eds.), EPJ web of conferences: Vol. 239. ND 2019: international conference on nuclear data for science and technology (p. 07001 (4 pp.). https://doi.org/10.1051/epjconf/202023907001

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:34574

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.

Details

Publication Type

Proceedings Paper

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

Author(s)

Mengoni, A.

Damone, L.A.

Barbagallo, M.

Aberle, O.

Alcayne, V.

Amaducci, S.

Andrzejewski, J.

Audouin, L.

Babiano-Suarez, V.

Bacak, M.

Dressler, R. (4701 Heavy Elements)