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**Chemistry / Re: How do I calculate radioactive dose rate at a distance?**

« **on:**14/04/2021 23:11:46 »

That's correct for a point source.

If the source is distributed over a significant area of radius r (such as contamination of a working surface or distribution in a human body) the dose rate at distance d is independent of d at close range (d<r) , decreasing as roughly 1/d if d < 5r and tending to 1/d

But you didn't come here for the obvious answer, did you?

If the source is distributed over a significant area of radius r (such as contamination of a working surface or distribution in a human body) the dose rate at distance d is independent of d at close range (d<r) , decreasing as roughly 1/d if d < 5r and tending to 1/d

^{2}if d > 10r.But you didn't come here for the obvious answer, did you?

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