Decoys would not be a problem for the US. A gamma-ray spectroscope weighs only a few ounces and costs only a few thousand dollars. It is almost certain that no one can produce a substance that looks like U-235 to a gamma-ray spectroscope that is cheaper to produce that highly-enriched uranium.
Decoys would not be a problem for the US. A gamma-ray spectroscope weighs only a few ounces and costs only a few thousand dollars. It is almost certain that no one can produce a substance that looks like U-235 to a gamma-ray spectroscope that is cheaper to produce that highly-enriched uranium.
I don’t dispute your larger point.