Abstract
We present status of simulations used to design a novel device for the detection of hazardous substances in the aquatic environment using neutron activation. Unlike the other considered methods based on this technique we propose to use guides for neutron and gamma quanta which speeds up and simplifies identification. First preliminary results show that both the neutron guide and the $\gamma$ ray guide increase the performance of underwater threats detection.
Highlights
Growing risk of terrorism demands a constant development of new techniques for hazardous substances detection
One of the best methods for homeland security are based on the Neutron Activation Analysis (NAA) providing non-intrusive detection of explosives or drugs
There are several devices based on Neutron Activation Analysis designed for ground homeland security which were introduced in the USA by Science Applications International Corporation [3] and CALSEC [4], and in Europe in Sodern [6], EURITRACK [5] and SWAN [7] projects
Summary
Growing risk of terrorism demands a constant development of new techniques for hazardous substances detection. The principle of the method is to use a fast neutron beam produced using sealed D+T generator to excite nuclei of investigated substance and detect characteristic gamma quanta produced in de-excitation of the nuclei. This allows one to identify the stoichiometry of the substance and determine if it is dangereus [1, 2]. In order to optimize the dimensions and relative positions of detectors and guides we have developed dedicated open source software package written in the C++ programming language [11] This simulation tool is using novel methods of geometry definition and particle tracking and the Open MPI library supporting parallel computing [13]. The neutron guide is a cuboid with dimensions 40 x 100 x 40 cm, while gamma rays
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