Measurements of Short-Lived Isomers from Photofission as a Method of Active Interrogation for Special Nuclear Materials

2021 ◽  
Vol 15 (3) ◽  
Author(s):  
S.W. Finch ◽  
M. Bhike ◽  
C.R. Howell ◽  
Krishichayan ◽  
W. Tornow ◽  
...  
Keyword(s):  
Nuclear Materials ◽  
Active Interrogation ◽  
Special Nuclear Materials

scholarly journals Rapid imaging of special nuclear materials for nuclear nonproliferation and terrorism prevention

2021 ◽  
Vol 7 (21) ◽  
pp. eabg3032
Author(s):  
Jana Petrović ◽  
Alf Göök ◽  
Bo Cederwall
Keyword(s):  
Nuclear Physics ◽  
Imaging Modality ◽  
Three Dimensional ◽  
Nuclear Fission ◽  
Machine Learning Techniques ◽  
Nuclear Materials ◽  
Prototype System ◽  
Fast Time ◽  
Gamma Emission ◽  
Special Nuclear Materials

We introduce a neutron-gamma emission tomography (NGET) technique for rapid detection, three-dimensional imaging, and characterization of special nuclear materials like weapons-grade plutonium and uranium. The technique is adapted from fundamental nuclear physics research and represents a previously unexplored approach to the detection and imaging of small quantities of these materials. The method is demonstrated on a radiation portal monitor prototype system based on fast organic scintillators, measuring the characteristic fast time and energy correlations between particles emitted in nuclear fission processes. The use of these correlations in real time in conjunction with modern machine learning techniques provides unprecedented imaging efficiency and high spatial resolution. This imaging modality addresses global security threats from terrorism and the proliferation of nuclear weapons. It also provides enhanced capabilities for addressing different nuclear accident scenarios and for environmental radiological surveying.

A Novel In-Beam Delayed Neutron Counting Technique for Characterization of Special Nuclear Materials

2016 ◽  
Vol 63 (6) ◽  
pp. 2807-2814 ◽  
Author(s):  
G. Bentoumi ◽  
R. B. Rogge ◽  
M. T. Andrews ◽  
E. C. Corcoran ◽  
I. Dimayuga ◽  
...  
Keyword(s):  
Nuclear Materials ◽  
Delayed Neutron ◽  
Delayed Neutron Counting ◽  
Special Nuclear Materials ◽  
Counting Technique ◽  
Neutron Counting

The Pricing of Special Nuclear Materials

1955 ◽  
Vol 31 (4) ◽  
pp. 339
Author(s):  
John Vernon Patrick
Keyword(s):  
Nuclear Materials ◽  
Special Nuclear Materials
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