RE: HP question - alpha sources

["Bradshaw, Keith" <Keith.Bradshaw@NNC.CO.UK>]

Title: HP question - alpha sources

Jaro/Radsafe

 

I don't see a problem with this.  All other things being equal, you'd expect to be able to take in a larger activity of a short-lived radionuclide than of a long-lived one.  The committed dose per unit activity will be higher for the long-lived radionuclide.

 

Do you mean the PHYSICAL half-life or the BIOLOGICAL half-life?  (But the same argument applies of course)

 

Personal views only

 

keith.bradshaw@nnc.co.uk

Original message: 

 Dear Radsafers,

Would anyone be able to tell me why it is that the ALI (IC-W) for Po-210 is 100 times HIGHER (0.6 µCi) than for Pu-239 & Am-241 (both 0.006 µCi), even though the T½ for Po-210 is 1140-times shorter than that of Am-241, and 63570-times shorter than that of Pu-239 ? Can someone please enlighten me about the reasons for this ?

Thanks in advance.

Jaro

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