[Zurück]

M. Barbagallo, N. Colonna, M. Bacak, E. Griesmayer, E. Jericha, P. Kavrigin, H. Leeb, C. Weiß, -. n_TOF Collaboration et al.:
"⁷Be(n,α) and ⁷Be(n,p) cross-section measurement for the cosmological lithium problem at the n_TOF facility at CERN";
EPJ Web of Conferences, 146 (2017), 01012; S. 1 - 4.

The Cosmological Lithium Problem refers to the large discrepancy between the abundance of primordial ⁷Li predicted by the standard theory of Big Bang Nucleosynthesis and the value inferred from the so-called "Spite plateau" in halo stars. A possible explanation for this longstanding puzzle in Nuclear Astrophysics is related to the incorrect estimation of the destruction rate of ⁷Be, which is responsible for the production of 95% of primordial Lithium. While charged-particle induced reactions have mostly been ruled out, data on the ⁷Be(n,α) and ⁷Be(n,p) reactions are scarce or completely missing, so that a large uncertainty still affects the abundance of ⁷Li predicted by the standard theory of Big Bang Nucleosynthesis. Both reactions have been measured at the n_TOF facility at CERN, providing for the first time data in a wide neutron energy range.

http://dx.doi.org/10.1051/epjconf/201714601012