[ RadSafe ] How many curies were involved in Hiroshima

Busby, Chris C.Busby at ulster.ac.uk
Wed Jun 22 13:22:31 CDT 2011

-----Original Message-----
From: radsafe-bounces at agni.phys.iit.edu on behalf of Steven Dapra
Sent: Wed 22/06/2011 16:20
To: The International Radiation Protection (Health Physics) Mailing List
Subject: Re: [ RadSafe ] How many curies were involved in Hiroshima
June 22

         Does you (Chris) mean internal exposure from one pico curie 
will have the same effect as internal exposure from one curie?

Steven Dapra

At 08:17 AM 6/22/2011, you wrote:

Dear Steven,
You do not get exposure from a picoCurie. That is an activity.
You would receive exposure from a microSievert or a microrem or somesuch.
Thsi would result in a absorbed dose.
What I am saying is that a picoCurie of absorbed Sr-90 doses not cause the same absorbed dose to the DNA as the exposure to the beta decay from Sr-90 would if delivered externally. This is because the internal Sr-90 is bound to the DNA and not floating about in the cytoplasm.

>For internal exposures dose is meaningless.
>See my other email.
>ICRP say this.
>CERRIE says this.
>IRSN say this.
>ECRR says this.


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