RE: Source for Uranium?

["A Karam" <paksbi@rit.edu>]

Ralph -

 

First, I am not sure where you can get these sources.  However....

 

Remember that U-234 may or may not be in secular equilibrium, depending

on weathering and exposure to groundwater.  It is not uncommon for U-234

to be present in higher concentrations in water, and lower

concentrations in minerals or soil.  Alpha damage to the crystal

structure increases the chance that U-234 will dissolve out of a

particular crystal, so U-234 enters water (and leaves crystals) more

readily than U-238.

 

Andy

 

P. Andrew Karam, Ph.D., CHP 

Research Assistant Professor 

Rochester Institute of Technology 

Department of Biological Sciences 

85 Lomb Memorial Drive 

Rochester, NY  14623 

+1 585-475-6432 

karam@mail.rit.edu <mailto:karam@mail.rit.edu>  



A foolish consistency is the hobgoblin of little minds, adored by little

statesmen and philosophers and divines. -Ralph Waldo Emerson, writer and

philosopher (1803-1882)



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

	From: owner-amrso@mcw.edu [mailto:owner-amrso@mcw.edu] On Behalf

Of NORTH, Ralph

	Sent: Tuesday, November 30, 2004 2:17 PM

	To: radsafe@list.vanderbilt.edu; amrso@mcw.edu

	Subject: Source for Uranium?

	

	

	



	We are trying to track down highly enriched U-233 and U-236 to

make a "double-spike" for U isotope analyses as part of a project to

date cave deposits (1,000's to 100,000's of years old).  We need on the

order of 10 mg each, and the key is that they need to be very low in

U-234, since we will look at that isotope to establish attainment of

secular equilibrium.  Normally Oakridge and New Brunswick have these,

but both tell me none is available at this time.



	 



	Any leads on sources we might try? Thanks.



	 



	Ralph North



	University of Wisconsin - Madison



	Safety Department



	 



	608-262-1524