comment: >
  
  They would have been able to identify the specific nuclide (Cesium-137) with the right equipment, and knowing the dimensions and radioactivity would either be confident it's the same one or there's pattern of identical capsules being lost on the same stretch of road.
context: The Australian Defence Force has been asked to verify the recovered capsule by checking its serial number.
  
  You want to read it? The number is small and I've forgotten my glasses. >
  
  I did wonder if they just stopped the search after finding the first radioactive object of the right size.