Be 7 (n,α) He 4 Reaction and the Cosmological Lithium Problem: Measurement of the Cross Section in a Wide Energy Range at n-TOF at CERN
- Barbagallo, M
- Musumarra, A.
- Cosentino, L.
- Maugeri, E.
- Heinitz, S.
- Mengoni, A.
- Dressler, R.
- Schumann, D.
- Käppeler, F.
- Colonna, N.
- Finocchiaro, P.
- Ayranov, M.
- Damone, L.
- Kivel, N.
- Aberle, O.
- Altstadt, S.
- Andrzejewski, J.
- Audouin, L.
- Bacak, M.
- Balibrea Correa, J.
- Barros, S.
- Bécares, V.
- Bečvář, F.
- Beinrucker, C.
- Berthoumieux, E.
- Billowes, J.
- Bosnar, D.
- Brugger, M.
- Caamaño, M.
- Calviani, M.
- Calviño, F.
- Cano Ott, D.
- Cardella, R.
- Casanovas, A.
- Castelluccio, D. M.
- Cerutti, F.
- Chen, Y. H.
- Chiaveri, E.
- Cortés, G.
- Cortés Giraldo, M. A.
- Cristallo, S.
- Diakaki, M.
- Domingo Pardo, C.
- Dupont, E.
- Duran, I.
- Fernandez Dominguez, B.
- Ferrari, A.
- Ferreira, P.
- Furman, W.
- Ganesan, S.
- García Rios, A.
- Gawlik, A.
- Glodariu, T.
- Göbel, K.
- Gonçalves, I. F.
- González Romero, E.
- Griesmayer, E.
- Guerrero, C.
- Gunsing, F.
- Harada, H.
- Heftrich, T.
- Heyse, J.
- Jenkins, D. G.
- Jericha, E.
- Katabuchi, T.
- Kavrigin, P.
- Kimura, A.
- Kokkoris, M.
- Krtička, M.
- Leal Cidoncha, E.
- Lerendegui, J.
- Lederer, C.
- Leeb, H.
- LO MEO, SERGIO
- Lonsdale, S. J.
- Losito, R.
- Macina, D.
- Marganiec, J.
- Martínez, T.
- MASSIMI, CRISTIAN
- Mastinu, P.
- Mastromarco, M.
- Mazzone, A.
- Mendoza, E.
- Milazzo, P. M.
- Mingrone, F.
- Mirea, M.
- Montesano, S.
- Nolte, R.
- Oprea, A.
- Pappalardo, A.
- Patronis, N.
- Pavlik, A.
- Perkowski, J.
- Piscopo, M.
- Plompen, A.
- Porras, I.
- Praena, J.
- Quesada, J.
- Rajeev, K.
- Rauscher, T.
- Reifarth, R.
- Riego Perez, A.
- Rout, P.
- Rubbia, C.
- Ryan, J.
- Sabate Gilarte, M.
- Saxena, A.
- Schillebeeckx, P.
- Schmidt, S.
- Sedyshev, P.
- Smith, A. G.
- Stamatopoulos, A.
- Tagliente, G.
- Tain, J. L.
- Tarifeño Saldivia, A.
- Tassan Got, L.
- Tsinganis, A.
- Valenta, S.
- VANNINI, GIANNI
- Variale, V.
- Vaz, P.
- Ventura, A.
- Vlachoudis, V.
- Vlastou, R.
- Vollaire, J.
- Wallner, A.
- Warren, S.
- Weigand, M.
- Weiß, C.
- Wolf, C.
- Woods, P. J.
- Wright, T.
- Žugec, P.
DOIAbstract
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 n-TOF facility at CERN, the availability of a sufficient amount of chemically pure Be7, and a specifically designed experimental setup. Coincidences between the two alpha particles have been recorded in two Si-Be7-Si arrays placed directly in the neut...
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