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⁷Be(n,α)⁴ He Reaction and the Cosmological Lithium Problem: Measurement of the Cross Section in a Wide Energy Range at n_TOF at CERN

Mengoni, A.; Dressler, R.; Schumann, D.; Kappeler, F; Altstadt, S; Audouin, L; Berthoumieux, E.; Billowes, J.; Diakaki, M; Duran, I; Ganesan, S.; Gunsing, F.; Heftrich, T; Jenkins, D G; Jenkins, D.G.; Kokkoris, M; Leal-Cidoncha, E.; Lerendegui, J.; Marganiec, J.; Patronis, N.; Pavlik, A.; Porras, I; Praena, J.; Quesada, J.M.; Riego-Perez, A.; Rout, P.C.; Ryan, J.; Saxena, A; Sedyshev, P.; Smith, A G; Stamatopoulos, A.; Tagliente, G; Valenta, S.; Vlastou, R.; Wallner, Anton; Warren, S.; Wright, T.

Description

The energy-dependent cross section of the Be7(n,α)He4 reaction, of interest for the so-called cosmological lithium problem in big bang nucleosynthesis, has been measured for the first time from 10 meV to 10 keV neutron energy. The challenges posed by the short half-life of Be7 and by the low reaction cross section have been overcome at n_TOF thanks to an unprecedented combination of the extremely high luminosity and good resolution of the neutron beam in the new experimental area (EAR2) of the...[Show more]

CollectionsANU Research Publications
Date published: 2016
Type: Journal article
URI: http://hdl.handle.net/1885/164021
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.117.152701
Access Rights: Open Access

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