RE: specific activity

["Raja Rajan" <rajarajan17@hotmail.com>]

Dr. Tara,

I have some doubts in the equation that you have given.  Are you sure it is 
(1mole/ x gram)?

Rajan

>From: "Bandini, Tara" <tara.bandini@rcp.dph.state.ma.us>
>Reply-To: radsafe@romulus.ehs.uiuc.edu
>To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
>Subject: RE: specific activity
>Date: Wed, 14 Jun 2000 13:07:26 -0500 (CDT)
>
>It's the basic activity equation, A = lambda * N, where A is specific
>activity, lambda is the decay constant, and N is the number of atoms per
>gram.
>
>Lambda = (ln 2) / half-life
>
>N = (Avogadro's Number of atoms / mole) * (1 mole / X grams) * [1 uCi / 
>(3.7
>E 4 d/s)]
>
>In this instance the half-life must be expressed in seconds.
>
>
>Tara M. Bandini
>Massachusetts Radiation Control Program
>Voice:  617.727.6214 x 2018
>Fax:     617.727.2098
>Pager:  800.366.2337 x 11786
>tara.bandini@rcp.dph.state.ma.us <mailto:Tara.bandini@state.ma.us>
>
>		-----Original Message-----
>		From:	kathy smith [mailto:kathysmith1963@hotmail.com]
>		Sent:	Wednesday, June 14, 2000 1:49 PM
>		To:	Multiple recipients of list
>		Subject:	specific activity
>
>		how does one go about determining the specific activity of
>something in
>		uCi/g ?
>

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