Actinium-225 (Accelerator-Produced)

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ISOTOPE    Actinium-225 (Accelerator-Produced)
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Half Life / Daughter10 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
Activity5.8x104 Ci/g at EOB, not carrier free (contains Ac-227)
Radiopurity≥98% Ac-225; ~0.12% Ac-227 at EOB
PRODUCTION
SourceProton irradiation of a natural thorium target
ProcessingSeparated by ion exchange and extraction chromatography
DISTRIBUTION
ShipmentGlass screw top V-vial in nonreturnable container
AvailabilityEvery other month
Unit of SaleMillicuries
ContactOak Ridge National Laboratory
National Isotope Development Center
Call: (865) 574-6984
Fax: (865) 574-6986
email: contact@isotopes.gov

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