Indirect measurement of the $$^3\hbox {He}$$ 3 He (n,p) $$^3\hbox {H}$$ 3 H reaction cross section at Big Bang
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Regular Article - Experimental Physics
Indirect measurement of the 3 He(n,p)3 H reaction cross section at Big Bang energies R. G. Pizzone1,a , C. Spampinato1,2,3 , R. Spartá1,2 , M. Couder4 , W. Tan4 , V. Burjan5 , G. D’Agata5 , G. L. Guardo1, M. La Cognata1, L. Lamia1,2,3 , J. Mrazek5 , S. Palmerini6,7 , S. Typel8,9 , A. Tumino1,10 , M. Wiescher4 , S. Anguilar4 , D. Bardayan4 , D. Blankstein4 , L. Boccioli4,6,7 , L. Callahan4 , S. M. Cha11 , K. Y. Chae11 , A. M. Clark4 , B. Frentz4 , M. R. Hall4 , A. Gula4 , S. Henderson4 , R. Kelmar4 , M. S. Kwag11 , I. Indelicato1, M. La Commara12 , D. Lattuada1,10 , Q. Liu4 , J. Long4 , M. Mazzocco13 , A. Majumdar4 , S. McGuinness4 , A. Nelson4 , A. A. Oliva1,2,3 , P. O’Malley4 , P. M. Prajapati1, G. G. Rapisarda1, S. Romano1,2,3 , M. L. Sergi1,2 , C. Seymour4 , M. Skulski4 , C. Spitaleri1,2 , J. Wilkinson4 1
Laboratori Nazionali del Sud-INFN, Catania, Italy Dipartimento di Fisica e Astronomia ”Ettore Maiorana”, Universitá di Catania, Catania, Italy 3 Centro Siciliano di Fisica Nucleare e Struttura della Materia, Catania, Italy 4 Department of Physics, University of Notre Dame, Notre Dame, IN, USA 5 Nuclear Physics Institute of the Czech Academy of Sciences, 250 68 Rež, ˇ Czech Republic 6 Universitá di Perugia, Perugia, Italy 7 INFN Perugia, Perugia, Italy 8 Technische Universität Darmstadt, Fachbereich Physik, Institut für Kernphysik, Darmstadt, Germany 9 GSI Helmholtzzentrum für Schwerionenforschung GmbH, Theorie, Darmstadt, Germany 10 Facoltá di Ingegneria e Architettura, Universitá degli Studi di Enna Kore, Enna, Italy 11 SKKU Sungkyunkwan University, Seoul, Korea 12 INFN and Universitá of Napoli, Napoli, Italy 13 Dipartimento di Fisica e Astronomia, University of Padova and INFN-Sezione di Padova, Padova, Italy 2
Received: 20 April 2020 / Accepted: 29 July 2020 © Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Communicated by Alexandre Obertelli
Abstract Nuclear reactions play a key role in the framework of the Big Bang Nucleosynthesis. A network of 12 principal reactions has been identified as the main path that drove the elemental nucleosynthesis in the first 20 min of the history of the Universe. Among them an important role is played by neutron-induced reactions, which, from an experimental point of view, are usually a difficult task to be measured directly. Nevertheless big efforts in the last decades have led to a better understanding of their role in the primordial nucleosynthesis network. In this work we apply the Trojan Horse Method to extract the cross section at astrophysical energies for the 3 He(n,p)3 H reaction after a detailed study of the 2 H(3 He,pt)H three-body process. Data extracted from the present measurement are compared with other published sets.
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1 Introduction One of the foundation stones of the Big Bang model, together with the Hubble expansion and the Cosmic Microwave Background (CMB) radiation [1], is the Big Bang Nucleo
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