Accurate dose assessment for high-energy high-dose applications can be achieved using an innovative magnetic resonance-based detector coupled with miniature alanine dosimeters. The alanine dosimeters are embedded within a water-proof durable tab or card form factor with a thickness of 0.76 mm. The system is under development for clinical level sensitivities with readings less than 10 Gy. Concurrently, the system is being tested at higher dose levels typical in sterilization processing with great performance: rapid scans completed within 5 seconds, accurate dose assessments, and it can readily adapted to automation. The response at higher doses is repeatable and comparable to traditional EPR systems using larger alanine pellets.

Initial studies have shown promise for gamma, x-ray, and e-beam dosimetry and therefore can enhance the use of alanine dosimetry systems. This dual-use technology is in an advanced stage of development for emergency preparedness response and is the result of a Collaborative Research and Development Agreement between Global Resonance Technologies, LLC and the National Institutes of Standards and Technology.

Shrestha, P. , Abhyankar, N. , Anders, M. , Cheung, K. , Gougelet, R. , Ryan, J. , Szalai, V. and Campbell, J. (2019), Nonresonant transmission line probe for sensitive interferometric electron spin resonance detection, Analytical Chemistry, [online], https://doi.org/10.1021/acs.analchem.9b01730 (Accessed May 31, 2022)

A summary of this work was presented at CIRMS in April 2021 and significant advances have been made since that time.