Re[2]: Rocky Flats: Pu-239,240:Am-241 Ratios

[Don.Hall@wssrap.com (Don Hall)]

     Here is the info on Rocky Flats


______________________________ Reply Separator _________________________________
Subject: Re: Pu-239,240:Am-241 Ratios 
Author:  radsafe@romulus.ehs.uiuc.edu at Internet
Date:    11/6/97 8:37 AM


          Joel;
     
          FYI, at Rocky Flats, our Background Soils Characterization 
          Project showed means of 0.038 pCi/g and 0.0107 pCi/g for Pu 
          239/240 and Am 241, respectively in surface soils.
     
          For stream sediments the numbers are 0.537 and 0.173 
          respectively.
     
          For subsurface soils (below 15 cm.) our results are 
          effectively zero.
     
          If you have any further questions, please give me a call.  We 
          have quite a few reports that may be of interest.
     
          Bates Estabrooks
          RFETS
          303-966-3769
     
     
______________________________ Reply Separator _________________________________
Subject: Pu-239,240:Am-241 Ratios 
Author:  Joel Webb <jwebb%cemrc.nmsu.edu@inet.rfets.gov> at inet 
Date:    11/5/97 6:06 PM
     
     
Hello!
     
Does anybody know what are reasonable values for the ratio of Pu-239,240 to 
Am-241 in soil from global fallout (I would guess between 2 and 3)?  Any 
references would be great.  Is anybody aware of Am-241 being depleted from soil 
relative to Pu-239,240? 
     
Thank you!
     
Joel Webb
New Mexico State University