AW: Half-life of Ra-228

[Hewing Peter RB4 <Peter.Hewing@off1.siemens.de>]

	George Koperski wrote:

> What is the correct value of the half-life for Ra-228 ?
> I have been consistently encountering two values: 5.75 years  and 6.7
> years.
> Which one is right ? Thank you
> 
	2100 days is the correct answer.
	Source: Report PTB-Ra-16/5 ISBN 3-89701-270-0


> Peter Hewing
> Radiation Protection of
> Siemens Karlstein
> phone: +49 6188-789251
> fax: +49 6188 780690
> e-mail: Peter.Hewing@off1.siemens.de
> 
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