Phosphorus-32 is a high-energy beta emitter that may create a whole body, skin, and an eye
hazard. Most common means of detection is with a thin-window probe or liquid scintillation.
1. Maximum energy: 1.71 MeV; the average energy is 0.570 MeV.
2. Maximum range in air: 19 feet (6 m).
3. Maximum range in tissue: 8 mm.
4. IAEA toxicity classification: Medium-low.
5. Physical half-life: 14.29 days.
6. Effective half-life (Teff): 10-14 days.
7. Critical organ:
Bone for transportable compounds.
Lung and lower large intestine are critical organs for inhalation and ingestion,
Personnel monitoring: Dosimeter and finger rings, uptakes may be determined by
4mCi (1 x 107 Bq) by inhalation, clearance in weeks.
4mCi (1 x 107 Bq) by ingestion.
10. Shielding: 1/2 inch (1.2 cm) of plexiglass (that will shield the beta particles and
minimize the production of bremsstrahlung).
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