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

被引：0
|
作者：
Damone, Lucia Anna [1 ]
Colonna, N. [1 ]
Barbagallo, M. [1 ,2 ]
Mastromarco, M. [1 ]
Andrzejewski, J. [3 ]
Finocchiaro, P. [4 ]
Cosentino, L. [4 ]
机构：
[1] INFN, Bari, Italy
[2] CERN, Geneva, Switzerland
[3] Univ Lodz, Lodz, Poland
[4] INFN, Lab Nazl Sud, Catania, Italy
来源：
9TH EUROPEAN SUMMER SCHOOL ON EXPERIMENTAL NUCLEAR ASTROPHYSICS | 2018年 / 184卷
关键词：
D O I：
10.1051/epjconf/201818402004
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
One of the most puzzling problems in Nuclear Astrophysics is the "Cosmological Lithium Problem", i.e the discrepancy between the primordial abundance of Li-7 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 is Be-7(n,p)Li-7. 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 of Be-7(n,p) cross section has been recently performed at n_TOF, with a pure Be-7 target produced by implantation of a Be-7 beam at ISOLDE. The experimental procedure, the setup used in the measurement and the results obtained so far will be here presented.
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