EPJ Web Conf.
Volume 260, 2022The 16th International Symposium on Nuclei in the Cosmos (NIC-XVI)
|Number of page(s)||6|
|Published online||24 February 2022|
Measurement of the 7Be(p, γ)8B reaction cross section with the recoil mass separator ERNA
1 Dipartimento di Matematica e Fisica, Università della Campania “L. Vanvitelli“, Viale Lincoln, 5, Caserta, Italy, EU
2 Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Via Cinthia snc, Napoli, Italy, EU
3 Dipartimento di Fisica “E. Pancini“, Università di Napoli “Federico II“, Via Cinthia snc, Napoli, Italy, EU
4 Dipartimento di Metodologie e Tecnologie per le Osservazioni e Misure, Centro Italiano Ricerche Aerospaziali, Capua, Italy, EU
5 Institute for Nuclear Research (Atomki), H-4001 Debrecen, Hungary, EU
6 Departamento de Física Nuclear, Instituto de Física da Universidade de São Paulo, São Paulo, SP, Brazil
7 Dipartimento di Economia, Management Istituzioni -Laboratorio Chimico-Merceologico, Università degli Studi di Napoli “Federico II“, Napoli, Italy, EU
8 RUBION, Ruhr-Universität Bochum, Bochum, Germany, EU
* e-mail: firstname.lastname@example.org
Published online: 24 February 2022
The cross section of 7Be(p,γ)8B represents one of the most important nuclear inputs for the prediction of the high energy component of solar neutrinos and it has also a direct impact on the 7Li abundance after the Big Bang Nucleosynthesis. The importance of this reaction triggered an intense experimental work over the last decades, where discrepancies were observed between the results of different measurements. In addition, a question remains about possible common systematic effects, considering that all measurements share the same experimental approach, i.e. an intense proton beam impinging on a 7Be radioactive target. Inverse kinematics, i.e. a 7Be ion beam and a hydrogen target, with the direct measurement of the total reaction cross section by means of the detection of the 8B recoils, can shed light on such systematic effects. Efforts attempted so far were limited by the low 7Be beam intensity. We present here the results of a new measurement at Ecm = 376 to 819 keV using a high intensity 7Be beam in combination with a windowless gas target and the recoil mass separator ERNA (European Recoil mass separator for Nuclear Astrophysics) at CIRCE (Center for Isotopic Research on Cultural and Environmental heritage), Caserta, Italy. Our results, including the systematic error, are compatible with previous measurements that yields lower value of S17(0) and are compatible with the currently accepted value from  only at a 2-σ level.
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.