One of the most puzzling problems in Nuclear Astrophysics is the "Cosmological Lithium Problem", i.e the discrepancy between the primordial abundance of7Li observed in metal poor halo stars [1], and the one predicted by Big Bang Nucleosynthesis (BBN). One of the reactions that could have an impact on the problem is7Be(n,p)7Li. Despite of the importance of this reaction in BBN, the cross-section has never been directly measured at the energies of interest for BBN. Taking advantage of the innovative features of the second experimental area at the n-TOF facility at CERN, an accurate measurement of7Be(n,p) cross section has been recently performed at n-TOF, with a pure7Be target produced by implantation of a7Be beam at ISOLDE. The experimental procedure, the setup used in the measurement and the results obtained so far will be here presented.

7Be(n,p) cross section measurement for the Cosmological Lithium Problem at the n-TOF facility at CERN

Lucia Anna, Damone;Barbagallo, M.;Mastromarco, M.;
2018-01-01

Abstract

One of the most puzzling problems in Nuclear Astrophysics is the "Cosmological Lithium Problem", i.e the discrepancy between the primordial abundance of7Li observed in metal poor halo stars [1], and the one predicted by Big Bang Nucleosynthesis (BBN). One of the reactions that could have an impact on the problem is7Be(n,p)7Li. Despite of the importance of this reaction in BBN, the cross-section has never been directly measured at the energies of interest for BBN. Taking advantage of the innovative features of the second experimental area at the n-TOF facility at CERN, an accurate measurement of7Be(n,p) cross section has been recently performed at n-TOF, with a pure7Be target produced by implantation of a7Be beam at ISOLDE. The experimental procedure, the setup used in the measurement and the results obtained so far will be here presented.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/221659
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? ND
social impact