7Be(n,α) and 7Be(n,p) cross-section measurement for the cosmological lithium problem at the n_TOF facility at CERN

M. Barbagallo; N. Colonna; O. Aberle; J. Andrzejewski; L. Audouin; V. Bécares; M. Bacak; J. Balibrea; S. Barros; F. Bečvář; C. Beinrucker; E. Berthoumieux; J. Billowes; D. Bosnar; M. Brugger; M. Caamaño; F. Calviño; M. Calviani; D. Cano-Ott; R. Cardella; A. Casanovas; D.M. Castelluccio; F. Cerutti; Y.H. Chen; E. Chiaveri; G. Cortés; M.A. Cortés-Giraldo; L. Cosentino; L.A. Damone; M. Diakaki; C. Domingo-Pardo; R. Dressler; E. Dupont; I. Durán; B. Fernández-Domínguez; A. Ferrari; P. Ferreira; P. Finocchiaro; V. Furman; K. Göbel; A.R. García; A. Gawlik; T. Glodariu; I.F. Gonçalves; E. González; A. Goverdovski; E. Griesmayer; C. Guerrero; F. Gunsing; H. Harada; T. Heftrich; S. Heinitz; J. Heyse; D.G. Jenkins; E. Jericha; F. Käppeler; Y. Kadi; T. Katabuchi; P. Kavrigin; V. Ketlerov; V. Khryachkov; A. Kimura; N. Kivel; M. Kokkoris; M. Krtička; E. Leal-Cidoncha; C. Lederer; H. Leeb; J. Lerendegui-Marco; S. Lo Meo; S.J. Lonsdale; R. Losito; D. Macina; J. Marganiec; T. Martínez; C. Massimi; P. Mastinu; M. Mastromarco; F. Matteucci; E.A. Maugeri; E. Mendoza; A. Mengoni; P.M. Milazzo; F. Mingrone; M. Mirea; S. Montesano; A. Musumarra; R. Nolte; A. Oprea; N. Patronis; A. Pavlik; J. Perkowski; J.I. Porras; J. Praena; J.M. Quesada; K. Rajeev; T. Rauscher; R. Reifarth; A. Riego-Perez; P.C. Rout; C. Rubbia; J.A. Ryan; M. Sabaté-Gilarte; A. Saxena; P. Schillebeeckx; S. Schmidt; D. Schumann; P. Sedyshev; A.G. Smith; A. Stamatopoulos; G. Tagliente; J.L. Tain; A. Tarifeño-Saldivia; L. Tassan-Got; A. Tsinganis; S. Valenta; G. Vannini; V. Variale; P. Vaz; A. Ventura; V. Vlachoudis; R. Vlastou; A. Wallner; S. Warren; M. Weigand; C. Weiss; C. Wolf; P.J. Woods; T. Wright; P. Žugec

doi:10.1051/epjconf/201714601012

All issues

Volume 146 (2017)

EPJ Web Conf., 146 (2017) 01012

Abstract

Open Access

Issue		EPJ Web Conf. Volume 146, 2017 ND 2016: International Conference on Nuclear Data for Science and Technology


Article Number		01012
Number of page(s)		4
Section		Astro Nuclear Physics
DOI		https://doi.org/10.1051/epjconf/201714601012
Published online		13 September 2017

EPJ Web of Conferences 146, 01012 (2017)
https://doi.org/10.1051/epjconf/201714601012

⁷Be(n,α) and ⁷Be(n,p) cross-section measurement for the cosmological lithium problem at the n_TOF facility at CERN

M. Barbagallo¹^a, N. Colonna¹, O. Aberle², J. Andrzejewski³, L. Audouin⁴, V. Bécares⁵, M. Bacak⁶, J. Balibrea⁵, S. Barros⁷, F. Bečvář⁸, C. Beinrucker⁹, E. Berthoumieux¹⁰, J. Billowes¹¹, D. Bosnar¹², M. Brugger², M. Caamaño¹³, F. Calviño¹⁴, M. Calviani², D. Cano-Ott⁵, R. Cardella², A. Casanovas¹⁴, D.M. Castelluccio¹⁵^,16, F. Cerutti², Y.H. Chen⁴, E. Chiaveri², G. Cortés¹⁴, M.A. Cortés-Giraldo¹⁷, L. Cosentino¹⁸, L.A. Damone¹^,19, M. Diakaki¹⁰, C. Domingo-Pardo²⁰, R. Dressler²¹, E. Dupont¹⁰, I. Durán¹³, B. Fernández-Domínguez¹³, A. Ferrari², P. Ferreira⁷, P. Finocchiaro¹⁸, V. Furman²², K. Göbel⁹, A.R. García⁵, A. Gawlik³, T. Glodariu²³, I.F. Gonçalves⁷, E. González⁵, A. Goverdovski²⁴, E. Griesmayer⁶, C. Guerrero¹⁷, F. Gunsing²^,10, H. Harada²⁵, T. Heftrich⁹, S. Heinitz²¹, J. Heyse²⁶, D.G. Jenkins²⁷, E. Jericha⁶, F. Käppeler²⁸, Y. Kadi², T. Katabuchi²⁹, P. Kavrigin⁶, V. Ketlerov²⁴, V. Khryachkov²⁴, A. Kimura²⁵, N. Kivel²¹, M. Kokkoris³⁰, M. Krtička⁸, E. Leal-Cidoncha¹³, C. Lederer³¹, H. Leeb⁶, J. Lerendegui-Marco¹⁷, S. Lo Meo¹⁵^,16, S.J. Lonsdale³¹, R. Losito², D. Macina², J. Marganiec³, T. Martínez⁵, C. Massimi¹⁶^,32, P. Mastinu³³, M. Mastromarco¹, F. Matteucci³⁴^,35, E.A. Maugeri²¹, E. Mendoza⁵, A. Mengoni¹⁵, P.M. Milazzo³⁴, F. Mingrone¹⁶, M. Mirea²³, S. Montesano², A. Musumarra¹⁸^,36, R. Nolte³⁷, A. Oprea²³, N. Patronis³⁸, A. Pavlik³⁹, J. Perkowski³, J.I. Porras²^,40, J. Praena¹⁷^,40, J.M. Quesada¹⁷, K. Rajeev⁴¹, T. Rauscher⁴²^,43, R. Reifarth⁹, A. Riego-Perez¹⁴, P.C. Rout⁴¹, C. Rubbia², J.A. Ryan¹¹, M. Sabaté-Gilarte²^,17, A. Saxena⁴¹, P. Schillebeeckx²⁶, S. Schmidt⁹, D. Schumann²¹, P. Sedyshev²², A.G. Smith¹¹, A. Stamatopoulos³⁰, G. Tagliente¹, J.L. Tain²⁰, A. Tarifeño-Saldivia²⁰, L. Tassan-Got⁴, A. Tsinganis³⁰, S. Valenta⁸, G. Vannini¹⁶^,32, V. Variale¹, P. Vaz⁷, A. Ventura¹⁶, V. Vlachoudis², R. Vlastou³⁰, A. Wallner⁴⁴, S. Warren¹¹, M. Weigand⁹, C. Weiss²^,6, C. Wolf⁹, P.J. Woods³¹, T. Wright¹¹, P. Žugec¹² and the n_TOF Collaboration

¹ Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
² European Organization for Nuclear Research (CERN), Switzerland
³ University of Lodz, Poland
⁴ Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
⁵ Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Spain
⁶ Technische Universität Wien, Austria
⁷ Instituto Superior Técnico, Lisbon, Portugal
⁸ Charles University, Prague, Czech Republic
⁹ Goethe University Frankfurt, Germany
¹⁰ CEA Saclay, Irfu, Gif-sur-Yvette, France
¹¹ University of Manchester, UK
¹² University of Zagreb, Croatia
¹³ University of Santiago de Compostela, Spain
¹⁴ Universitat Politècnica de Catalunya, Spain
¹⁵ Agenzia nazionale per le nuove tecnologie (ENEA), Bologna, Italy
¹⁶ Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
¹⁷ Universidad de Sevilla, Spain
¹⁸ INFN Laboratori Nazionali del Sud, Catania, Italy
¹⁹ Dipartimento di Fisica, Università degli Studi di Bari, Italy
²⁰ Instituto de Física Corpuscular, Universidad de Valencia, Spain
²¹ Paul Scherrer Institut (PSI), Villingen, Switzerland
²² Joint Institute for Nuclear Research (JINR), Dubna, Russia
²³ Horia Hulubei National Institute of Physics and Nuclear Engineering, Romania
²⁴ Institute of Physics and Power Engineering (IPPE), Obninsk, Russia
²⁵ Japan Atomic Energy Agency (JAEA), Tokai-mura, Japan
²⁶ European Commission, Joint Research Centre, Geel, Retieseweg 111, 2440 Geel, Belgium
²⁷ University of York, UK
²⁸ Karlsruhe Institute of Technology, Campus North, IKP, 76021 Karlsruhe, Germany
²⁹ Tokyo Institute of Technology, Japan
³⁰ National Technical University of Athens, Greece
³¹ School of Physics and Astronomy, University of Edinburgh, UK
³² Dipartimento di Fisica e Astronomia, Università di Bologna, Italy
³³ Istituto Nazionale di Fisica Nucleare, Sezione di Legnaro, Italy
³⁴ Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Italy
³⁵ Dipartimento di Astronomia, Università di Trieste, Italy
³⁶ Dipartimento di Fisica e Astronomia, Università di Catania, Italy
³⁷ Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
³⁸ University of Ioannina, Greece
³⁹ University of Vienna, Faculty of Physics, Vienna, Austria
⁴⁰ University of Granada, Spain
⁴¹ Bhabha Atomic Research Centre (BARC), India
⁴² Centre for Astrophysics Research, University of Hertfordshire, UK
⁴³ Department of Physics, University of Basel, Switzerland
⁴⁴ Australian National University, Canberra, Australia

^a e-mail: massimo.barbagallo@cern.ch

Published online: 13 September 2017

Abstract

The Cosmological Lithium Problem refers to the large discrepancy between the abundance of primordial ⁷Li predicted by the standard theory of Big Bang Nucleosynthesis and the value inferred from the so-called “Spite plateau” in halo stars. A possible explanation for this longstanding puzzle in Nuclear Astrophysics is related to the incorrect estimation of the destruction rate of ⁷Be, which is responsible for the production of 95% of primordial Lithium. While charged-particle induced reactions have mostly been ruled out, data on the ⁷Be(n,α) and ⁷Be(n,p) reactions are scarce or completely missing, so that a large uncertainty still affects the abundance of ⁷Li predicted by the standard theory of Big Bang Nucleosynthesis. Both reactions have been measured at the n_TOF facility at CERN, providing for the first time data in a wide neutron energy range.

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