Target characterizations for direct measurement of the 13C(α, n)16O reaction at LUNA 400
1 Gran Sasso Science Institute, Viale Francesco Crispi 7, 67100 L’ Aquila, Italy
2 INFN, Laboratori Nazionali del Gran Sasso (LNGS), Via G. Acilelli, 67100 Assergi, Italy
3 Università di Napoli Federico II and INFN, Sezione di Napoli, Strada Comunale Cintia, 80126 Napoli, Italy
4 Institute for Nuclear Research (MTA Atomki), PO Box 51, HU-4001 Debrecen, Hungary
* e-mail: email@example.com
Published online: 30 December 2017
The 13C(α, n)16O reaction is the main neutron source for the s-process in low mass AGB stars. Although several direct measurements have been performed, no dataset reaches the Gamow window due to the low cross section. Moreover a dominant component of systematic uncertainty comes from target behaviour under beam irradiation.
This work presents a detailed characterization of enriched 13C targets in order to test reproducibility and uniformity of the evaporation method, stability and purity of targets under a high intensity proton beam (100-200 uA) for the study of this reaction at the Laboratory for Underground Nuclear Astrophysics (LUNA) facility installed at Laboratori Nazionali del Gran Sasso (LNGS, INFN). A procedure to evaluate the target thickness and to monitor its degradation is discussed and preliminary results are presented.
© The Authors, published by EDP Sciences, 2017
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. (http://creativecommons.org/licenses/by/4.0/).