New Reaction Rates For The Destruction Of Be-7 During Big Bang Nucleosynthesis Measured At Cern/N_tof And Their Implications On The Cosmological Lithium Problem

A. Mengoni,L.A. Damone,M. Barbagallo,O. Aberle,V. Alcayne,S. Amaducci, J. Andrzejewski,L. Audouin, V Babiano-Suarez,M. Bacak,S. Bennett,E. Berthoumieux,D. Bosnar,A.S. Brown,M. Busso,M. Caamaño,L. Caballero,M. Calviani,F. Calviño,D Cano-Ott,A. Casanovas, F. Cerutti,E. Chiaveri,N. Colonna,G.P. Cortés,M.A. Cortés-Giraldo,L. Cosentino,S. Cristallo,P.J. Davies,M. Diakaki,M. Dietz,C Domingo-Pardo,R. Dressler,Q. Ducasse,E. Dupont,I. Durán, Z. Eleme, B. Fernández-Domíngez, A. Ferrari, I. Ferro-Gonçalves,P. Finocchiaro,V. Furman,R. Garg,A. Gawlik,S. Gilardoni, K. Göbel,E. González-Romero,C. Guerrero,F. Gunsing,S. Heinitz,J. Heyse, D.G. Jenkins,E. Jericha, U. Jiri,A. Junghans,Y. Kadi,F. Käppeler,A. Kimura, I. Knapová,M. Kokkoris, Y. Kopatch,M. Krtička,D. Kurtulgil, I. Ladarescu,C Lederer-Woods,J Lerendegui-Marco,S.-J. Lonsdale, D. Macina,A. Manna,T. Martínez,A. Masi,C. Massimi,P.F. Mastinu,M. Mastromarco,E. Maugeri,A. Mazzone,E. Mendoza, V. Michalopoulou,P.M. Milazzo,M.A. Millán-Callado, F. Mingrone, J Moreno-Soto,A. Musumarra,A. Negret,F. Ogállar,A. Oprea,N. Patronis, A. Pavlik,J. Perkowski,C. Petrone, L. Piersanti,E. Pirovano,I. Porras,J. Praena, J.M. Quesada,D. Ramos Doval,R. Reifarth,D. Rochman, C. Rubbia,M. Sabaté-Gilarte,A. Saxena, P. Schillebeeckx,D. Schumann, A. Sekhar,A.G. Smith,N. Sosnin, P. Sprung,A. Stamatopoulos,G. Tagliente,J.L. Tain,A.E. Tarifeño-Saldivia,L Tassan-Got,B. Thomas,P. Torres-Sánchez, A. Tsinganis, S. Urlass,S. Valenta, G. Vannini,V. Variale,P. Vaz,A. Ventura,D. Vescovi,V. Vlachoudis, R. Vlastou,A. Wallner,P.J. Woods,T.J. Wright,P. Žugec

ND 2019: INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY（2020）

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摘要

New measurements of the Be-7(n,alpha)He-4 and Be-7(n,p)Li-7 reaction cross sections from thermal to keV neutron energies have been recently performed at CERN/n_TOF. Based on the new experimental results, astrophysical reaction rates have been derived for both reactions, including a proper evaluation of their uncertainties in the thermal energy range of interest for big bang nucleosynthesis studies. The new estimate of the Be-7 destruction rate, based on these new results, yields a decrease of the predicted cosmological Li-7 abundance insufficient to provide a viable solution to the cosmological lithium problem.

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关键词

Big Bang nucleosynthesis,Lithium,Neutron,Reaction rate,Nuclear physics,Large Hadron Collider,Range (particle radiation),Thermal,Physics

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