Chemical properties
Pb-203 is usually in divalent state.
Nuclear properties
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.
Production
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.
Distribution
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
| Parameter | Specifications |
|---|---|
| Production route | Tl-205(d,4n)Pb-203 |
| Daughter | Decays to stable Tl-203 |
| Half-life | 51.92 hours |
| Processing | Ion exchange chromatography |
| Primary Container | Borosilicate glass V-vial with silicon rubber screw cap |
| Product Grade | n.c.a. |
| Physical Form | Liquid |
| 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. |
| Microbiological quality | n.a. |
| Bacterial endotoxin | n.a. |
| pH (pH strips) | n.a. |
| Additional information | |
| Activity available | n.a. |
| Activity limit for UN2910 (excepted package) shipment | 3 GBq (solid form) or 300 MBq (liquid form) |
| Other information | - |