Actinium-225 (Thorium-229 Decay Product)

Related Products:   Actinium-225 (Acc)  Actinium-227
ISOTOPE    225Ac
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Half Life / Daughter9.920 days to francium-221
Decay ModeMultiple alpha and beta emissions to stable bismuth-209
Major RadiationAlpha: 5.83 MeV
Beta: 1.42 MeV
FormDried nitrate solid
Activity5.80 x 104 Ci/g (theoretical specific activity); carrier free
Radiopurity>98% Ac-225; <2% Ra-225
SourceDecay of thorium-229
ProcessingSeparated by ion exchange and solvent extraction
ShipmentGlass screw cap bottle in nonreturnable container
AvailabilityWeekly; order far in advance due to limited supply
Unit of SaleMillicuries
ContactOak Ridge National Laboratory
National Isotope Development Center
Call: (865) 574-6984
Fax: (865) 574-6986

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