RADIUS

RADIUS: Rapid Nuclear Detonation Typing by In-situ and Laboratory Gamma Spectrometry in Urban Settings

Prompt, accurate characterization of the nature of a nuclear detonation is an important capability in response and emergency preparedness. In the immediate aftermath, decision-makers must be able to rapidly assess the nature and scale of the event to facilitate appropriate descions and measures. Important information in this regard is that related to the nature of the event (fusion/fission) and the nature of the subsequent neutron fluence which both serve to characterize the event and dimension subsequent response actions. Currently, most authorities are likely limited in their ability to distinguish between detonations that are fission-only and those which may include fusion without time consuming and complex laboratory-based analysis of fallout or debris. This project aims to investigate and, where possible, develop a methodology that leverages the advantages of gamma spectrometry – both in-situ and laboratory - of urban infrastructural and other materials to attempt to infer the nature of the event. The approach is grounded in neutron activation analysis (NAA) wherein materials exposed to high neutron fluences during a detonation undergo nuclear reactions that produce radionuclides characteristic of the material and the fluence to which it has been exposed. These activation products, in materials such as concrete, asphalt, brick, and other materials may potentially serve as convenient indicators of the neutron energy spectrum and fluence, which may in turn yield information as to the processes involved in the detonation.

Mark Dowdall:  mark.dowdall@dsa.se 

phone number: +47 67162500