Year
1996
Abstract
The 252Cf-source-driven noise analysis method has been used to measure the neutron multiplication factor for subcritical systems and to identify fissionable materials and configurations. These measurements with the moderator-ring configuration have shown that the 252Cf-source-driven noise methods, both in the time and frequency domain, can be used to identify and distinguish the2 42Pu from the 239Pu ring. Signatures for each ring can be used to track and confirm the presence of these two types of plutonium rings. Because of the sensitivity of these signatures to mass, these measurements can also confirm the plutonium mass. These preliminary measurements have not explored the full range of capability of this method for this application.