Thorium-229

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ISOTOPE    229Th
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Half Life / Daughter(7.932 ± 0.120) x 103 years to radium-225
Decay ModeAlpha decay
Major RadiationAlpha particle at 4.8453 MeV, Gamma-rays at 193.6 and 210.94 keV, and many
α’s and γ’s from decay daughters
FormNitrate in 0.1 M nitric acid
Activity1.97x 10-1 Ci/g (Theoretical Specific Activity)
Radiopurity>99%
PRODUCTION
SourceDecay of mass-separated uranium-233
ProcessingDissolution and ion exchange chromatography
DISTRIBUTION
ShipmentGlass bottle
AvailabilityStock. Classed as a nuclear material requiring documentation of transfer
(DOE/NRC Form 741)
Unit of SaleMicrograms
ContactOak Ridge National Laboratory
National Isotope Development Center
Call: (865) 574-6984
Fax: (865) 574-6986
email: contact@isotopes.gov

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