Pb-203 is usually in divalent state.
Pb-203 decays by electron capture (100 % EC) to stable Tl-203, followed by the emission of one dominant γ-ray at 279.2 keV (80.94(6)%) and X-rays, notably Kα at ≈72 keV (58.8(3) %) and Kβ at ≈83 keV (16.3(3) %). These energies make Pb-203 suitable for SPECT (single photon emission computed tomography) imaging. The mean electron energy emitted per decay is 44 keV, the mean photon energy per decay is 314 keV.
Pb-203 is produced via deuteron irradiation of Tl-205 targets at ARRONAX (Nantes, France), followed by a radiochemical Pb/Tl separation via ion exchange chromatography.
Irradiation and radiochemical separation are performed at ARRONAX (Nantes, France). Activity will be shipped from there to the users in form of 1 M ammonium acetate solution.
Examples of use
|Daughter||Decays to stable Tl-203|
|Processing||Ion exchange chromatography|
|Primary Container||Borosilicate glass V-vial with silicon rubber screw cap|
|Chemical Form||1 M ammonium acetate|
|Radioactive Concentration (gamma spectrometry)||n.a.|
|Appearance||Clear colourless solution|
|Radionuclide identification (gamma spectrometry)||279.2 keV (81%), 401.3 keV (3.35%),|
|Radionuclidic Purity (gamma spectrometry)||>98%|
|Chemical purity (ICP-OES)||n.a.|
|Molar activity (ICP-OES)||n.a.|
|Apparent Molar Activity||n.a.|
|pH (pH strips)||n.a.|
|Activity limit for UN2910 (excepted package) shipment||3 GBq (solid form) or 300 MBq (liquid form)|