skip to main content

Title: Non-invasive material discrimination using spectral x-ray radiography

Current radiographic methods are limited in their ability to determine the presence of nuclear materials in containers or composite objects. A central problem is the inability to distinguish the attenuation pattern of high-density metals from those with a greater thickness of a less dense material. Here, we show that spectrally sensitive detectors can be used to discriminate plutonium from multiple layers of other materials using a single-view radiograph. An inverse algorithm with adaptive regularization is used. The algorithm can determine the presence of plutonium in simulated radiographs with a mass resolution per unit area of at least 0.07 g cm{sup −2}.
Authors:
 [1] ;  [2] ; ; ; ;  [3] ;  [1]
  1. Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78715-0162 (United States)
  2. (United States)
  3. Pacific Northwest National Laboratory, Richland, Washington 99354-1793 (United States)
Publication Date:
OSTI Identifier:
22273586
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 15; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 98 NUCLEAR DISARMAMENT, SAFEGUARDS AND PHYSICAL PROTECTION; ALGORITHMS; ATTENUATION; CHEMICAL ANALYSIS; COMPUTERIZED SIMULATION; CONTAINERS; DENSITY; IMAGES; MASS RESOLUTION; PLUTONIUM; RADIOACTIVE MATERIALS; THICKNESS; X-RAY RADIOGRAPHY