The $^{7}$Be($\boldsymbol{n,p}$)$^{7}$Li reaction and the Cosmological Lithium Problem: measurement of the cross section in a wide energy range at n_TOF (CERN)
Creators: name: Damone, L.
name: Barbagallo, M.
name: Mastromarco, M.
name: Mengoni, A.
name: Cosentino, L.
name: Maugeri, E.
name: Heinitz, S.
name: Schumann, D.
name: Dressler, R.
name: Käppeler, F.
name: Colonna, N.
name: Finocchiaro, P.
name: Andrzejewski, J.
name: Perkowski, J.
name: Gawlik, A.
name: Aberle, O.
name: Altstadt, S.
name: Ayranov, M.
name: Audouin, L.
name: Bacak, M.
name: Balibrea-Correa, J.
name: Ballof, J.
name: Bécares, V.
name: Bečvář, F.
name: Beinrucker, C.
name: Bellia, G.
name: Bernardes, A. P.
name: Berthoumieux, E.
name: Billowes, J.
name: Borge, M. J. G.
name: Bosnar, D.
name: Brown, A.
name: Brugger, M.
name: Busso, M.
name: Caamaño, M.
name: Calviño, F.
name: Calviani, M.
name: Cano-Ott, D.
name: Cardella, R.
name: Casanovas, A.
name: Castelluccio, D. M.
name: Catherall, R.
name: Cerutti, F.
name: Chen, Y. H.
name: Chiaveri, E.
name: Cortés, G.
name: Cortés-Giraldo, M. A.
name: Cristallo, S.
name: Diakaki, M.
name: Dietz, M.
name: Domingo-Pardo, C.
name: Dorsival, A.
name: Dupont, E.
name: Duran, I.
name: Fernandez-Dominguez, B.
name: Ferrari, A.
name: Ferreira, P.
name: Furman, W.
name: Ganesan, S.
name: García-Rio, A.
name: Gilardoni, S.
name: Glodariu, T.
name: Göbel, K.
name: Gonçalves, I. F.
name: González-Romero, E.
name: Goodacre, T. D.
name: Griesmayer, E.
name: Guerrero, C.
name: Gunsing, F.
name: Harada, H.
name: Heftrich, T.
name: Heyse, J.
name: Jenkins, D. G.
name: Jericha, E.
name: Johnston, K.
name: Kadi, Y.
name: Kalamara, A.
name: Katabuchi, T.
name: Kavrigin, P.
name: Kimura, A.
name: Kivel, N.
name: Kohester, U.
name: Kokkoris, M.
name: Krtička, M.
name: Kurtulgil, D.
name: Leal-Cidoncha, E.
name: Lederer-Woods, C.
name: Leeb, H.
name: Lerendegui-Marco, J.
name: Meo, S. Lo
name: Lonsdale, S. J.
name: Losito, R.
name: Macina, D.
name: Marganiec, J.
name: Marsh, B.
name: Martíne, T.
name: Correia, J. G. Martins
name: Masi, A.
name: Massimi, C.
name: Mastinu, P.
name: Matteucci, F.
name: Mazzone, A.
name: Mendoza, E.
name: Milazzo, P. M.
name: Mingrone, F.
name: Mirea, M.
name: Musumarra, A.
name: Negret, A.
name: Nolte, R.
name: Oprea, A.
name: Patronis, N.
name: Pavlik, A.
name: Piersanti, L.
name: Piscopo, M.
name: Plompen, A.
name: Porras, I.
name: Praena, J.
name: Quesada, J. M.
name: Radeck, D.
name: Rajeev, K.
name: Rauscher, T.
name: Reifarth, R.
name: Riego-Perez, A.
name: Rothe, S.
name: Rout, P.
name: Rubbia, C.
name: Ryan, J.
name: Sabaté-Gilarte, M.
name: Saxena, A.
name: Schell, J.
name: Schillebeeckx, P.
name: Schmidt, S.
name: Sedyshev, P.
name: Seiffert, C.
name: Smith, A. G.
name: Sosnin, N. V.
name: Stamatopoulos, A.
name: Stora, T.
name: Tagliente, G.
name: Tain, J. L.
name: Tarifeño-Saldivia, A.
name: Tassan-Got, L.
name: Tsinganis, A.
name: Valenta, S.
name: Vannini, G.
name: Variale, V.
name: Vaz, P.
name: Ventura, A.
name: Vlachoudis, V.
name: Vlastou, R.
name: Wallner, A.
name: Warren, S.
name: Weigand, M.
name: Weiß, C.
name: Wolf, C.
name: Woods, P. J.
name: Wright, T.
name: Žugec, P.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report on the measurement of the $^{7}$Be($n, p$)$^{7}$Li cross section from thermal to approximately 325 keV neutron energy, performed in the high-flux experimental area (EAR2) of the n\_TOF facility at CERN. This reaction plays a key role in the lithium yield of the Big Bang Nucleosynthesis (BBN) for standard cosmology. The only two previous time-of-flight measurements performed on this reaction did not cover the energy window of interest for BBN, and showed a large discrepancy between each other. The measurement was performed with a Si-telescope, and a high-purity sample produced by implantation of a $^{7}$Be ion beam at the ISOLDE facility at CERN. While a significantly higher cross section is found at low-energy, relative to current evaluations, in the region of BBN interest the present results are consistent with the values inferred from the time-reversal $^{7}$Li($p, n$)$^{7}$Be reaction, thus yielding only a relatively minor improvement on the so-called Cosmological Lithium Problem (CLiP). The relevance of these results on the near-threshold neutron production in the p+$^{7}$Li reaction is also discussed.