Re: specific activity

From: Alberto Fasso' <>
Date: Sat, 12 Jan 2013 06:28:28 -0800 (PST)

Hi Mina,

WHAT(6) is just a number by which the final score is divided.
It can be the volume of the region, or its mass, or whatever you like.
What is important, is that you know what you put there, and interpret the
results accordingly. I have used it sometimes to do the normalization
to the actual source intensity. These are all things that you can do
also by letting WHAT(6)=1 and doing the normalization by hand.


On Fri, 11 Jan 2013, Mina Nozar wrote:

> Hello everyone,
> In the Resnuclei card, WHAT(6) represents volume of the region. So if I enter the volume of the region of interest, I
> would get Activity/volume or Bq/cm^3. This is if I use DCYSCORE and DCYTIMES.
> Suppose I would like to have specific activity, i.e. Activity/mass or (Bq/kg).
> I could leave WHAT(6) blank and do the normalization by mass during a post processing stage.
> But I think I can do it here by entering (volume * density/1000) - with volume and density units in the cgs system - for
> WHAT(6) instead of volume to get specific activity.
> Am I right? If so, this could simplify things a bit.
> Thanks and best wishes,
> Mina
Received on Sat Jan 12 2013 - 22:41:42 CET

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