Experimental and MCNP simulated gamma-ray spectra for the UNCOSS neutron-based explosive detector

被引：27

作者：

Eleon, C. ^{[1
]}

Perot, B. ^{[1
]}

Carasco, C. ^{[1
]}

Sudac, D. ^{[2
]}

Obhodas, J. ^{[2
]}

Valkovic, V. ^{[3
]}

机构：

[1] CEA, DEN, Nucl Measurement Lab, F-13108 St Paul Les Durance, France

[2] Rudjer Boskovic Inst, Zagreb 10000, Croatia

[3] ACTdoo Anal & Control Technol, Zagreb 10000, Croatia

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2011年 / 629卷 / 01期

关键词：

Associated particle technique; Fast neutron inspection; Gamma-ray detectors; Explosive detection; Monte Carlo simulation; INSPECTION SYSTEM; SEA;

D O I：

10.1016/j.nima.2010.11.055

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In the frame of the FP7 UNCOSS project (Underwater Coastal Sea Surveyor), whose aim is to develop a neutron-based explosive detection system to identify unexploded ordnance (UXO) lying on the sea bottom, the choice of the gamma-ray detector is essential to reach the optimal performances. This paper presents comparative tests between the two candidates: NaI(Tl) and LaBr3(Ce) detectors, in favour to the 3 in. x 3 in. LaBr3(Ce): thus, confirming the choice previously performed by numerical simulation because of its higher fast timing properties, spectral resolution, and efficiency per volume unit. The gamma-ray spectra produced by 14 MeV tagged neutron beams on the elements of interest (C, O, N, Al, Fe, Si, and Ca) have also been recorded with this detector in order to unfold the spectrum of the interrogated object into elementary contributions. A qualitative comparison with the gamma-ray spectra simulated with the MCNPX computer code and the ENDFB/VII.0 nuclear library has also been performed to validate the numerical model. An additional quantitative validation has been performed with an explosive-like material (ammonium acetate). (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：220 / 229

页数：10

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