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|  DOE-HDBK-1106-97
Radiological Contamination Control Training
for Laboratory Research
Instructor's Guide
Instructor's Notes
CHLORINE-36 (Cl-36)
Chlorine-36 is a medium-energy beta emitter. Use a thin-end
window G-M detector or liquid scintillation counter for
detection.
Maximum energy: 0.710 MeV (the average energy
1.
is 0.233 MeV).
Maximum range in air: 7 feet (2 m).
2.
3.
Maximum range in tissue: 0.1 inch (2.6 mm).
4.
IAEA toxicity classification: High-medium.
Physical half-life: 3 x 105 years.
5.
6.
Effective half-life (Teff): 10-29 days.
7.
Critical organ:
o
Whole body for transportable compounds.
o
Lung for inhalation.
o
Lower large intestine for ingestion.
8.
Personnel monitoring: Urinanalysis, finger rings.
A-16
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