Naslov
7Be(n, α) and 7Be(n, p) cross-section measurement for the cosmological lithium problem at the n_TOF facility at CERN

Autori
Barbagallo, M. ; ... ; Bosnar, Damir ; ... ; Žugec, Petar

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
EPJ Web of Conferences 146 / A. Plompen, F.-J. Hambsch, P. Schillebeeckx, W. Mondelaers, J. Heyse, S. Kopecky, P. Siegler, S. Oberstedt - , 2017, 01012-1

ISBN
978-2-7598-9020-0

Skup
ND 2016: International Conference on Nuclear Data for Science and Technology

Mjesto i datum
Brugge, Belgija, 11.09.2016. - 16.09.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
n_TOF, CERN, 7Be(n, α), 7Be(n, p), cosmological lithium problem, Big Bang nucleosynthesis

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA