RE: chains in equillibrium

["Baratta, Edmond J" <EBARATTA@ORA.FDA.GOV>]

There is an 'old' article in ANALYTICAL CHEMISTRY BY H. R. Kirby, Volume 26,

No. 6, June, 1954 pp 1065-1071 that has all the equations for Uranium-238,

Uranium-235 and Thorium-232.



Ed 



Edmond J. Baratta

Radiation Safety Officer

Tel. No. 781-729-5700, ext 728

FAX: 781-729-3593





-----Original Message-----

From: BERNARD L COHEN [mailto:blc+@PITT.EDU] 

Sent: Thursday, October 31, 2002 9:15 AM

To: Tom Hazlett

Cc: radsafe; info@xrfcorp.com

Subject: Re: chains in equillibrium





On Wed, 30 Oct 2002, Tom Hazlett wrote:



> Radsafers,

> Can anyone provide a reference that provides information on the relative

> intensity of the gamma rays emitted by a chain of isotopes that is in

> equilibrium?



	The decay rate for all members of the chain is equal to the decay

rate of the parent nucleus for the chain.



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