[ RadSafe ] K-40

[Mike Quastel]

  Quite a long time indeed. The half life of K40 is 1.25 billion years.
	Mike Quastel

On Jul 29, 2008, at 11:23 PM, Edmond Baratta wrote:

>
> My quote in the past has been:   if someone does't have any  
> Potassium-40 in their body, they have been dead for a long time.   
> As we all know, thier is no life without radioactivity.
>
> Ed Baratta
>
> edmond0033 at comcast.net
>
> ----- Original Message ----- From: "Robert Barish"  
> <robbarish at verizon.net>
> To: <radsafe at radlab.nl>
> Sent: Tuesday, July 29, 2008 3:28 PM
> Subject: [ RadSafe ] K-40
>
>
> As a footnote to the thread on granite, Brazil nuts, etc. the test  
> source that I use for demonstrating the use of a Geiger counter is  
> an ordinary pill bottle containing the usual potassium chloride  
> tablets prescribed as a supplement for patients on antihypertensive  
> medications that include diuretics. A typical 3 cm x 6 cm pill  
> bottle filled with these tablets makes quite an impressive display.  
> Think of the millions of people who are ingesting these little  
> radioactive sources very day! Scary, huh?
>
> Rob Barish, CHP, FAAPM
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