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

被引：31
|
作者：
Cazzaniga, C. [1 ,2 ]
Nocente, M. [1 ,2 ]
Tardocchi, M. [2 ]
Rebai, M. [1 ]
Pillon, M. [3 ]
Camera, F. [4 ]
Giaz, A. [4 ]
Pellegri, L. [4 ]
Gorini, G. [1 ,2 ]
机构：
[1] Univ Milano Bicocca, Dept Phys, I-20125 Milan, Italy
[2] Associaz EURATOM ENEA CNR, Ist Fis Plasma, I-20125 Milan, Italy
[3] Associaz EURATOM ENEA Fus ENEA CR Frascati, I-00044 Rome, Italy
[4] Univ Milan, Dept Phys, I-20133 Milan, Italy
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2015年 / 778卷
关键词：
Scintillators; Gamma-ray spectroscopy; Fast neutrons; Burning plasma; GAMMA-RAY DIAGNOSTICS; ENERGETIC IONS; LABR3CE; DETECTORS; GENERATOR; PLASMAS;
D O I：
10.1016/j.nima.2015.01.002
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The response of a 3 '' x 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 Br-79, Br-81 and La-139 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 Br-78 and Br-80 isotopes produced in (n,2n) reactions. The results presented in this paper are of relevance for the design of gamma-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. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：20 / 25
页数：6
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