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|  DOE-HDBK-1106-97
Radiological Contamination Control Training
for Laboratory Research
Student's Guide
PHOSPHORUS-32 (P-32)
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:
o
Bone for transportable compounds.
o
Lung and lower large intestine are critical organs for inhalation and ingestion,
respectively.
Personnel monitoring: Dosimeter and finger rings, uptakes may be determined by urinalysis.
8.
9.
ALI:
4mCi (1 x 107 Bq) by inhalation, clearance in weeks.
o
4mCi (1 x 107 Bq) by ingestion.
o
10.
Shielding: 1/2 inch (1.2 cm) of plexiglass (that will shield the beta particles and minimize
the production of bremsstrahlung).
A-7
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