[Ben_Edict]

Originally Posted by ftpaddict

Wikipedia kindly points this out:

So somewhere between these values, I presume.

That is a factor of 1000x - and does not much to answer my question. We can easily find values for high altitude radiation (which is very mixed, too) and for the definition of X-rays. But at what exact frequencies do the X-ray scanners work. You won't find any info on the market leader's Smiths Heimann website, for example.

And how is the film's response to these different wavelengthes?

If we know the scanner's energy levels (modern scanners employ multi-energy X-ray sources) and the film response, we could deduce, how much a certain film is affected, how often it could be X-rayed, before the damage is visible etc.

Ben