The response of a 3″×3″ LaBr3(Ce) scintillator to 14 MeV neutron irradiation has been measured at the Frascati Neutron Generator and simulated by means of a dedicated MCNP model. Several reactions are found to contribute to the measured response, with a key role played by neutron inelastic scattering and (n,2n) reactions on 79Br, 81Br and 139La isotopes. An overall 43% efficiency to 14 MeV neutron detection above an experimental threshold of 0.35 MeV is calculated and confirmed by measurements. Post irradiation activation of the crystal has been also observed and is explained in terms of nuclear decays from the short lived 78Br and 80Br isotopes produced in (n,2n) reactions. The results presented in this paper are of relevance for the design of γ-ray detectors in burning plasma fusion experiments of the next generation, such as ITER, where capability to perform measurements in an intense 14 MeV neutron flux is required.

Cazzaniga, C., Nocente, M., Tardocchi, M., Rebai, M., Pillon, M., Camera, F., et al. (2015). Response of LaBr3(Ce) scintillators to 14 MeV fusion neutrons. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 778, 20-25 [10.1016/j.nima.2015.01.002].

Response of LaBr3(Ce) scintillators to 14 MeV fusion neutrons

NOCENTE, MASSIMO
Secondo
;
TARDOCCHI, MARCO;REBAI, MARICA;GORINI, GIUSEPPE
Ultimo
2015

Abstract

The response of a 3″×3″ LaBr3(Ce) scintillator to 14 MeV neutron irradiation has been measured at the Frascati Neutron Generator and simulated by means of a dedicated MCNP model. Several reactions are found to contribute to the measured response, with a key role played by neutron inelastic scattering and (n,2n) reactions on 79Br, 81Br and 139La isotopes. An overall 43% efficiency to 14 MeV neutron detection above an experimental threshold of 0.35 MeV is calculated and confirmed by measurements. Post irradiation activation of the crystal has been also observed and is explained in terms of nuclear decays from the short lived 78Br and 80Br isotopes produced in (n,2n) reactions. The results presented in this paper are of relevance for the design of γ-ray detectors in burning plasma fusion experiments of the next generation, such as ITER, where capability to perform measurements in an intense 14 MeV neutron flux is required.
Articolo in rivista - Articolo scientifico
Burning plasma; Fast neutrons; Gamma-ray spectroscopy; Scintillators; Instrumentation; Nuclear and High Energy Physics
English
20
25
6
Cazzaniga, C., Nocente, M., Tardocchi, M., Rebai, M., Pillon, M., Camera, F., et al. (2015). Response of LaBr3(Ce) scintillators to 14 MeV fusion neutrons. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 778, 20-25 [10.1016/j.nima.2015.01.002].
Cazzaniga, C; Nocente, M; Tardocchi, M; Rebai, M; Pillon, M; Camera, F; Giaz, A; Pellegri, L; Gorini, G
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/128673
Citazioni
  • Scopus 28
  • ???jsp.display-item.citation.isi??? 28
Social impact