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Title: Matrix Characterization in Threat Material Detection Processes

Abstract

Matrix characterization in the threat material detection is of utmost importance, it generates the background against which the threat material signal has to be identified. Threat materials (explosive, chemical warfare, ...) are usually contained within small volume inside large volumes of variable matrices. We have studied the influence of matrix materials on the capability of neutron systems to identify hidden threat material. Three specific scenarios are considered in some details: case 1--contraband material in the sea containers, case 2 - explosives in soil (landmines), case 3 - explosives and chemical warfare on the sea bottom. Effects of container cargo material on tagged neutron system are seen in the increase of gamma background and the decrease of neutron beam intensity. Detection of landmines is more complex because of variable soil properties. We have studied in detail space and time variations of soil elemental compositions and in particular hydrogen content (humidity). Of special interest are ammunitions and chemical warfare on the sea bottom, damping sites and leftovers from previous conflicts (WW-I, WW-II and local). In this case sea sediment is background source and its role is similar to the role of the soil in the landmine detection. In addition to geochemical cyclingmore » of chemical elements in semi-enclosed sea, like the Adriatic Sea, one has to consider also anthropogenic influence, especially when studying small scale variations in concentration levels. Some preliminary experimental results obtained with tagged neutron sensor inside an underwater vehicle are presented as well as data on sediment characterization by X-Ray Fluorescence.« less

Authors:
; ;  [1]
  1. Institute Ruder Boskovic, Bijenicka c. 54, Zagreb (Croatia)
Publication Date:
OSTI Identifier:
21289598
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1099; Journal Issue: 1; Conference: CAARI 2008: 12. international conference on application of accelerators in research and industry, Fort Worth, TX (United States), 10-15 Aug 2008; Other Information: DOI: 10.1063/1.3120103; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CARGO; CHEMICAL WARFARE; CONTAINERS; DETECTION; EMISSION SPECTRA; EXPLOSIVES; HYDROGEN; MATRIX MATERIALS; MULTI-ELEMENT ANALYSIS; NEUTRON BEAMS; QUANTITATIVE CHEMICAL ANALYSIS; RUTHERFORD BACKSCATTERING SPECTROSCOPY; SEDIMENTS; SOILS; X-RAY FLUORESCENCE ANALYSIS; X-RAY SPECTRA

Citation Formats

Obhodas, J, Sudac, D, and Valkovic, V. Matrix Characterization in Threat Material Detection Processes. United States: N. p., 2009. Web. doi:10.1063/1.3120103.
Obhodas, J, Sudac, D, & Valkovic, V. Matrix Characterization in Threat Material Detection Processes. United States. doi:10.1063/1.3120103.
Obhodas, J, Sudac, D, and Valkovic, V. Tue . "Matrix Characterization in Threat Material Detection Processes". United States. doi:10.1063/1.3120103.
@article{osti_21289598,
title = {Matrix Characterization in Threat Material Detection Processes},
author = {Obhodas, J and Sudac, D and Valkovic, V},
abstractNote = {Matrix characterization in the threat material detection is of utmost importance, it generates the background against which the threat material signal has to be identified. Threat materials (explosive, chemical warfare, ...) are usually contained within small volume inside large volumes of variable matrices. We have studied the influence of matrix materials on the capability of neutron systems to identify hidden threat material. Three specific scenarios are considered in some details: case 1--contraband material in the sea containers, case 2 - explosives in soil (landmines), case 3 - explosives and chemical warfare on the sea bottom. Effects of container cargo material on tagged neutron system are seen in the increase of gamma background and the decrease of neutron beam intensity. Detection of landmines is more complex because of variable soil properties. We have studied in detail space and time variations of soil elemental compositions and in particular hydrogen content (humidity). Of special interest are ammunitions and chemical warfare on the sea bottom, damping sites and leftovers from previous conflicts (WW-I, WW-II and local). In this case sea sediment is background source and its role is similar to the role of the soil in the landmine detection. In addition to geochemical cycling of chemical elements in semi-enclosed sea, like the Adriatic Sea, one has to consider also anthropogenic influence, especially when studying small scale variations in concentration levels. Some preliminary experimental results obtained with tagged neutron sensor inside an underwater vehicle are presented as well as data on sediment characterization by X-Ray Fluorescence.},
doi = {10.1063/1.3120103},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1099,
place = {United States},
year = {2009},
month = {3}
}