Re: Numerous Transuranics found at Niagara - Help

["Steven Dapra" <sjd@swcp.com>]

June 25, 2004



	Lanthanum has 17 known radioactive isotopes.  Which one are you referring

to, Lewis?  La-140 has a half-life of 40 hours so it's probably long gone.



	I haven't been able to locate the number of actinium isotopes, but Ac-228

has a half-life of about 6 hours.  My guess is it's long gone too.



Steven Dapra

sjd@swcp.com









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