https://doi.org/10.1140/epja/i2016-16072-7
Review
Underground nuclear astrophysics: Why and how
1
INFN, Laboratori Nazionali del Gran Sasso, Via G. Acitelli 22, 67100, Assergi (AQ), Italy
2
Dipartimento di Fisica e Astronomia, Università di Padova, Via Marzolo 8, Padova, Italy
3
INFN, Sezione di Padova, via Marzolo 8, 35131, Padova, Italy
4
Institute for Nuclear Research (MTA Atomki), Debrecen, Hungary
5
INFN, Laboratori Nazionali di Legnaro, Legnaro, Italy
6
Dipartimento di Fisica, Università di Napoli “Federico II”, and INFN, Sezione di Napoli, Napoli, Italy
7
Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
* e-mail: caciolli@pd.infn.it
Received:
3
August
2015
Accepted:
1
January
2016
Published online:
5
April
2016
The goal of nuclear astrophysics is to measure cross-sections of nuclear physics reactions of interest in astrophysics. At stars temperatures, these cross-sections are very low due to the suppression of the Coulomb barrier. Cosmic-ray-induced background can seriously limit the determination of reaction cross-sections at energies relevant to astrophysical processes and experimental setups should be arranged in order to improve the signal-to-noise ratio. Placing experiments in underground sites, however, reduces this background opening the way towards ultra low cross-section determination. LUNA (Laboratory for Underground Nuclear Astrophysics) was pioneer in this sense. Two accelerators were mounted at the INFN National Laboratories of Gran Sasso (LNGS) allowing to study nuclear reactions close to stellar energies. A summary of the relevant technology used, including accelerators, target production and characterisation, and background treatment is given.
© SIF, Springer-Verlag Berlin Heidelberg, 2016