RE: Ac-227 & Th-227

["Bradshaw, Keith" <Keith.Bradshaw@nnc.co.uk>]

> -----Original Message-----
> From:	Grant Wilton [SMTP:gwilton@chem.swri.edu]
> Sent:	Monday, August 14, 2000 9:29 PM
> To:	Multiple recipients of list
> Subject:	Ac-227 & Th-227
> 
> Does anyone have any leads on analytical methods for Ac-227 and Th-227?  I
> believe these are the relatively harmless "natural" isotopes as opposed to
> the deadly man-made type ;-)
> 
	My first idea is to simply measure Th-227 with gamma spec (in
material undisturbed for about 18 weeks Ac-227 and Th-227 should be in
secular equilibrium).  Make sure you don't confuse the 256.3 keV Th-227
gamma peak with the 258.8 keV Pb-214 peak.

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	Regards

	keith.bradshaw@nnc.co.uk

	END




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