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Characterization of the LUNA neutron detector array for the measurement of the 13C(α,n)16O reaction
- Source :
- Csedreki, L, Ciani, G F, Balibrea-Correa, J, Best, A, Aliotta, M, Barile, F, Bemmerer, D, Boeltzig, A, Broggini, C, Bruno, C G, Caciolli, A, Cavanna, F, Chillery, T, Colombetti, P, Corvisiero, P, Davinson, T, Depalo, R, Di Leva, A, Elekes, Z, Ferraro, F, Fiore, E M, Formicola, A, Fulop, Z, Gervino, G, Guglielmetti, A, Gustavino, C, Gyurky, G, Imbriani, G, Janas, Z, Junker, M, Kochanek, I, Lugaro, M, Marigo, P, Masha, E, Mazzocchi, C, Menegazzo, R, Mossa, V, Pantaleo, F R, Paticchio, V, Perrino, R, Piatti, D, Prati, P, Schiavulli, L, Stockel, K, Straniero, O, Szucs, T, Takacs, M P, Terrasi, F & Zavatarelli, S 2021, ' Characterization of the LUNA neutron detector array for the measurement of the 13C(α,n)16O reaction ', Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 994, 165081 . https://doi.org/10.1016/j.nima.2021.165081
- Publication Year :
- 2021
-
Abstract
- We introduce the LUNA neutron detector array developed for the investigation of the 13C(α, n)16O reaction towards its astrophysical s-process Gamow peak in the low-background environment of the Laboratori Nazionali del Gran Sasso (LNGS). Eighteen 3He counters are arranged in two different configurations (in a vertical and a horizontal orientation) to optimize neutron detection efficiency, target handling and target cooling over the investigated energy range Eα,lab=300−400 keV (En=2.2−2.6MeV in emitted neutron energy). As a result of the deep underground location, the passive shielding of the setup and active background suppression using pulse shape discrimination, we reached a total background rate of 1.23±0.12 counts/hour. This resulted in an improvement of two orders of magnitude over the state of the art allowing a direct measurement of the 13C(α, n)16O cross-section down to Eα,lab=300 keV. The absolute neutron detection efficiency of the setup was determined using the 51V(p,n)51Cr reaction and an AmBe radioactive source, and completed with a Geant4 simulation. We determined a (34 ± 3)% and (38 ± 3)% detection efficiency for the vertical and horizontal configurations, respectively, for En=2.4MeV neutrons.
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Csedreki, L, Ciani, G F, Balibrea-Correa, J, Best, A, Aliotta, M, Barile, F, Bemmerer, D, Boeltzig, A, Broggini, C, Bruno, C G, Caciolli, A, Cavanna, F, Chillery, T, Colombetti, P, Corvisiero, P, Davinson, T, Depalo, R, Di Leva, A, Elekes, Z, Ferraro, F, Fiore, E M, Formicola, A, Fulop, Z, Gervino, G, Guglielmetti, A, Gustavino, C, Gyurky, G, Imbriani, G, Janas, Z, Junker, M, Kochanek, I, Lugaro, M, Marigo, P, Masha, E, Mazzocchi, C, Menegazzo, R, Mossa, V, Pantaleo, F R, Paticchio, V, Perrino, R, Piatti, D, Prati, P, Schiavulli, L, Stockel, K, Straniero, O, Szucs, T, Takacs, M P, Terrasi, F & Zavatarelli, S 2021, ' Characterization of the LUNA neutron detector array for the measurement of the 13C(α,n)16O reaction ', Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 994, 165081 . https://doi.org/10.1016/j.nima.2021.165081
- Accession number :
- edsair.dedup.wf.001..be23f4e14614e8637eb11af34cb0b8a2
- Full Text :
- https://doi.org/10.1016/j.nima.2021.165081