https://doi.org/10.1140/epja/s10050-020-00324-4
Regular Article – Experimental Physics
The
He+
He
+
reaction below the Coulomb barrier via the Trojan Horse Method
1
INFN, Laboratori Nazionali del Sud, via S. Sofia 62, 95123, Catania, Italy
2
Dipartimento di Fisica e Astronomia “Ettore Majorana”, Universitá degli Studi di Catania, Catania, Italy
3
Technische Universität Darmstadt, Fachbereich Physik, Institut für Kernphysik, Darmstadt, Germany
4
GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
5
Department of Physics and Astronomy, Texas A&M University-Commerce, 75429, Commerce, TX, USA
6
Cyclotron Institute, Texas A&M University, College Station, TX, USA
7
National Astronomical Observatory of Japan, 181-8588, Mitaka, Tokyo, Japan
8
Graduate School of Science, The University of Tokyo, Bunkyo-ku, 113-0033, Tokyo, Japan
9
School of Physics, Beihang University, 100083, Beijing, People’s Republic of China
10
Jožef Stefan Institute, Ljubljana, Slovenia
11
Ruđer Bošković Institute, Zagreb, Croatia
12
Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia
13
Departamento de Física Atómica, Molecular y Nuclear, Universidad de Sevilla, Seville, Spain
14
Beijing Radiation Center, Beijing Academic of Science and Technology, Beijing, China
15
Department of Nuclear Reactions, Nuclear Physics Institute of CAS, Prague, Czech Republic
16
Materials Science Division, Lawrence Berkeley National Laboratory, 94702, Berkeley, CA, USA
17
Facoltá di Ingegneria e Architettura, Universitá degli Studi di Enna “Kore”, Enna, Italy
18
Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
19
INFN Sezione di Perugia, Perugia, Italy
Received:
13
October
2020
Accepted:
6
December
2020
Published online:
12
January
2021
For the first time in an application to nuclear astrophysics, a process induced by the unstable He = (
He-n) nucleus, the
He+
He
2
reaction, has been studied through the Trojan Horse Method (THM). For that purpose, the quasi-free (QF) contribution of the
Be(
He,
)
He reaction was selected at
MeV incident energy. The reaction was studied in a kinematically complete experiment following a recent publication (Spitaleri et al. in Eur Phys J A 56:18, 2020), where for the quasi free contribution the momentum distribution between
and
He particle cluster in the
Be nucleus in the ground state have been extracted. The angular distribution of the QF
He+
He
2
reaction was measured at
= 78
–115
. The energy dependence of the differential cross section of the
He+
He
2
virtual reaction was extracted in the energy range
= 0–650 keV. The total cross section obtained from the Trojan-horse method was normalized to absolute cross sections from a theoretical calculation in the energy range
=300–620 keV.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021