Fast-neutron induced background in LaBr3:Ce detectors

J. Kiener 1 V. Tatischeff 1 I. Deloncle 2 N. De Séréville 3 Philippe Laurent C. Blondel M. Chabot 3 R. Chipaux 4 A. Coc 1 S. Dubos A. Gostojic` 1 N. Goutev C. Hamadache 1 F. Hammache 3 B. Horeau O. Limousin 5 S. Ouichaoui G. Prévot R. Rodríguez-Gasén 1 M.S. Yavahchova
1 CSNSM AN
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
2 CSNSM SNO
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière : UMR8609
3 IPNO - Institut de Physique Nucléaire d'Orsay
4 DEDI - Département d'Electronique, des Détecteurs et d'Informatique (ex SEDI)
5 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
Abstract : The response of a scintillation detector with a cylindrical 1.5-in. LaBr3:Ce crystal to incident neutrons has been measured in the energy range En = 2–12 MeV. Neutrons were produced by proton irradiation of a Li target at Ep = 5–14.6 MeV with pulsed proton beams. Using the time-of-flight information between target and detector, energy spectra of the LaBr3:Ce detector resulting from fast neutron interactions have been obtained at 4 different neutron energies. Neutron-induced γ rays emitted by the LaBr3:Ce crystal were also measured in a nearby Ge detector at the lowest proton beam energy. In addition, we obtained data for neutron irradiation of a large-volume high-purity Ge detector and of a NE-213 liquid scintillator detector, both serving as monitor detectors in the experiment. Monte-Carlo type simulations for neutron interactions in the liquid scintillator, the Ge and LaBr3:Ce crystals have been performed and compared with measured data. Good agreement being obtained with the data, we present the results of simulations to predict the response of LaBr3:Ce detectors for a range of crystal sizes to neutron irradiation in the energy range En = 0.5–10 MeV.
Keywords : Neutron irradiation Monte-Carlo simulation NE-213 LaBr3:Ce HP-Ge
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Journal articles
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http://hal.in2p3.fr/in2p3-01186694
Contributor : Emilie Bonnardel <>
Submitted on : Thursday, August 27, 2015 - 12:32:07 PM
Last modification on : Friday, March 15, 2019 - 2:28:06 PM

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J. Kiener, V. Tatischeff, I. Deloncle, N. De Séréville, Philippe Laurent, et al.. Fast-neutron induced background in LaBr3:Ce detectors. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 2015, 798, pp.152-161. ⟨10.1016/j.nima.2015.07.022⟩. ⟨in2p3-01186694⟩

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