[ RadSafe ] *** SPAM *** Re: Global deposition of man made radionuclides

[Dave Kirkland]

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Content preview:  Dear Douglas I'm afraid I can’t help you with that, but
  I do share your interest in it. I have spent many years trying to understand
   how the effects of natural and anthropogenic alpha irradiation depend on
  the form of the source(s). In particular: what is the most carcinogenic way
   of distributing a given number of alpha emitting atoms in the lung… hot
   particles , warm particles or as individual atoms?? The official? line is
   that atomic dispersion (as usually occurs with indoor radon and decay products
   due to their monatomic state) is the most carcinogenic. However there are
   reasons (animal experiments) to believe that the most carcinogenic distribution
   may be as warm alpha emitting clusters; as probably occurs with the anthropogenic
   atmospheric contaminants you are interested in. Best regards David Scotland
   PS Good luck with your important quest (I’ll keep it in mind) [...] 

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