Detection of Illicit Nuclear Materials Masked with other Gamma-Ray Emitters
The purpose of this work was to experimentally determine the extent to which legal shipments of radioisotopes could be used to mask the presence of illicit nuclear materials and the means by which this can be accomplished.
Characteristics of prompt, delayed, and prompt-delayed radiation in monitoring strongly screened fissile substances by the pulsed photonuclear method
The purpose of the present work is to investigate numerically the energy-time characteristics of γ and neutron radiation emitted from strongly screened fissile substances irradiated by pulsed bremsstrahlung. It is shown that when fissile materials are screened by a metal with a small or medium atomic number (e.g., aluminum and iron) the prompt and delayed neutrons provide the greatest information for monitoring fissile substances. When fissile substances screened by hydrogen-containing materials are irradiated, γ rays delayed with respect to the probe radiation pulse are emitted and can be an indication of the presence of fissile substances. The time intervals for detecting prompt and delayed neutrons and delayed γ rays are evaluated.
RIP - General Purpose Interactive Display at HHIRF
RIP is a general purpose interactive code for display and analysis of data acquired with the Holifield Heavy Ion Research Facility (HHIRF) accelerators at Oak Ridge National Laboratory. The HHIRF data acquisition system includes a version of RIP for on-line display of one-and two-dimensional histograms on color graphic terminals and hard copy on color printer/plotters. General features of the program and interactive techniques will be described.