Neither X-ray nor x-ray fluorescence (XRF) is going to be able to scan large objects properly for gold from a distance. XRF machines only show the surface or slightly below the surface. If you put gold inside a lead pipe - no chance.
If there was ever a method to reliably detect gold from a distance without costing millions of dollars, it would start a new gold rush.
So, this was either discovered by a very careful inspection or more likely a tip-off.
If there was ever a method to reliably detect gold from a distance without costing millions of dollars, it would start a new gold rush.
So, this was either discovered by a very careful inspection or more likely a tip-off.