Associated-particle sealed-tube neutron probe: Detection of explosives, contraband, and nuclear materials
Continued research and development of the APSTNG shows the potential for practical field use of this technology for detection of explosives, contraband, and nuclear materials. The APSTNG (associated-particle sealed-tube generator) inspects the item to be examined using penetrating 14-MeV neutrons generated by the deuterium-tritium reaction inside a compact accelerator tube. An alpha detector built into the sealed tube detects the alpha-particle associated with each neutron emitted in a cone encompassing the volume to be inspected. Penetrating high-energy gamma-rays from the resulting neutron reactions identify specific nuclides inside the volume. Flight-times determined from the detection times of gamma-rays and alpha-particles separate the prompt and delayed gamma-ray spectra and allow a coarse 3-D image to be obtained of nuclides identified in the prompt spectrum. The generator and detectors can be on the same side of the inspected object, on opposite sides, or with intermediate orientations. Thus, spaces behind walls and other confined regions can be inspected. Signals from container walls can be discriminated against using the flight-time technique. No collimators or shielding are required, the neutron generator is relatively small, and commercial-grade electronics are employed. The use of 14-MeV neutrons yields a much higher cross-section for detecting nitrogen than that for systems based on thermal-neutron reactions alone, and the broad range of elements with significant 14-MeV neutron cross-sections extends explosives detection to other elements including low-nitrogen compounds, and allows detection of many other substances. Proof-of-concept experiments have been successfully performed for conventional explosives, chemical warfare agents, cocaine, and fissionable materials.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 226061
- Report Number(s):
- ANL/RE/CP-89582; CONF-9604126-1; ON: DE96009045; TRN: AHC29610%%103
- Resource Relation:
- Conference: Moscow International Science and Technology Center symposium on nuclear physics methods for detecting smuggled explosives and nuclear materials, Obninsk (Russian Federation), 8-11 Apr 1996; Other Information: PBD: [1996]
- Country of Publication:
- United States
- Language:
- English
Similar Records
Associated-particle sealed-tube neutron probe for characterization of materials
Advances in associated-particle sealed-tube neutron probe diagnostics for substance detection
Related Subjects
05 NUCLEAR FUELS
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
NUCLEAR REACTION ANALYZERS
DESIGN
CHEMICAL EXPLOSIVES
DETECTION
CHEMICAL WARFARE AGENTS
FISSIONABLE MATERIALS
COCAINE
NUCLEAR REACTION ANALYSIS
NEUTRON GENERATORS
RADIATION DETECTORS
NONDESTRUCTIVE ANALYSIS
USES
OPERATION
RADIOACTIVE WASTES
SECURITY
ENTRY CONTROL SYSTEMS