In this program, BTI is developing a portable prototype system to detect former locations of radiological or nuclear materials using the optically stimulated luminescence characteristics of common materials. Radiation inherently deposits energy into surrounding material, trapping electrons in excited meta-stable states. These trapped electrons may be stored subsequent to the removal of the radiation source and can be released through optical stimulation and detected at a later date. This radiation-induced charge storage and subsequent release with light is the basis of optically stimulated luminesence (OSL). The use of OSL techniques to measure radiation dose has several conventional applications including geological and archeological dating, retrospective dosimetry, and personnel dosimetry.

In this project, BTI is developing a portable system that allows authorities to use the OSL properties of common, everyday materials, to detect whether the materials have been exposed to radiation. The program includes partners from DRDC-Ottawa (lead federal agency), Royal Canadian Mounted Police, and Public Safety and Emergency Preparedness Canada.