[ RadSafe ] Chris Busby

[Otto G. Raabe]

At 12:28 PM 4/21/2011, Billwrote:
>My apologies-I was looking at the 90Sr half-life not the 90Y half life. The
>average time between decay events is 3.9 days. This is still a relatively
>long time.
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That makes little difference.

The chance that the two beta particles, which would be expected have 
widely different energies and ranges, will both go in the same 
direction and hit the same target DNA is very, very  small anyway.

Otto


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Prof. Otto G. Raabe, Ph.D., CHP
Center for Health & the Environment
University of California
One Shields Avenue
Davis, CA 95616
E-Mail: ograabe at ucdavis.edu
Phone: (530) 752-7754   FAX: (530) 758-6140
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