7Be(n,α) and 7Be(n,p) cross-section measurement for the cosmological lithium problem at the n TOF facility at CERN
Metadatos
Mostrar el registro completo del ítemAutor
Barbagallo, M.; TOF Collaboration; Porras Sánchez, José Ignacio; Praena Rodríguez, Antonio JavierEditorial
EDP Sciences
Fecha
2017Referencia bibliográfica
Barbagallo, M. ; 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, 01012 (2017) ND2016 [http://hdl.handle.net/10481/52211]
Resumen
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.