Actinium-225


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ISOTOPE    225Ac
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Half Life / Daughter10 days to bismuth-213
Decay ModeMultiple alpha and beta emissions to stable 209Bi
Major RadiationAlpha - 8.38 MeV
Beta - 1.42 MeV
FormDried nitrate solid
Activity5.80 x 104 Ci/g; carrier free; >10 mCi/ml concentration
Radiopurity> 98% Ac-225; < 2% Ra-225
PRODUCTION
SourceDecay of thorium-229
ProcessingSeparated by ion exchange and solvent extraction
DISTRIBUTION
ShipmentGlass screw cap bottle in nonreturnable container
AvailabilityEvery 2 weeks, 20-30 mCi; 4-6 weeks advance order
Unit of SaleMillicuries
ContactOak Ridge National Laboratory
National Isotope Development Center
Call: (865) 574-6984
Fax: (865) 574-6986
email: isotopes@ornl.gov

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