Actinium-225

ISOTOPE ²²⁵Ac
Half Life / Daughter	10 days to bismuth-213
Decay Mode	Multiple alpha and beta emissions to stable ²⁰⁹Bi
Major Radiation	Alpha - 8.38 MeV Beta - 1.42 MeV
Form	Nitrate in 0.1 M nitric acid
Activity	5.80 x 10⁴ Ci/g; carrier free; >10 mCi/ml concentration
Radiopurity	> 98% Ac-225; < 2% Ra-225
PRODUCTION
Source	Decay of thorium-229
Processing	Separated by ion exchange and solvent extraction
DISTRIBUTION
Shipment	Glass screw cap bottle in nonreturnable container
Availability	Every 2 weeks, 20-30 mCi; 4-6 weeks advance order
Unit of Sale	Millicuries
Note: Quantity discounts may be available. Call for current discounted price.
Contact	Oak Ridge National Laboratory Isotope Business Office Call: (865) 574-6984 Fax: (865) 574-6986 email: isotopes@ornl.gov