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MANGANESE - 54
(54Mn)
| Physical Half-life: | 312.5 days |
| Radiations: | Gamma 835 (99.9%)keV |
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| External Exposure: | External hazard. Radiation
exposures from 1 mCi source of 54Mn are 188 mR/hr and 47 mR/hr
@ 5cm and 10 cm, respectively.
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| Biological Data: |
ALI | 2 mCi (ingestion), 0.9 mCi (inhalation) |
| Biological half-life |
25 days |
| Effective half-life |
23 days |
| Critical Organs |
Liver and Gastrointestinal Tract |
| Bioassay |
Urinalysis (Not routinely done.) |
| Shielding: |
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HVL 0.74 cm of lead; TVL 2.46 cm of lead |
Monitoring
& Efficiency |
LSC (Eff. ~30%)
NaI Gamma Counter (Eff. ~5%)
Thin-window GM
(Eff. <1%) |
Special Considerations
- Use forceps with rubber sleeves to handle unshielded sources and
potentially contaminated vessels, and work at arms length.
- Always store 54Mn vials in lead containers or behind
shields.
- Wear a radiation badge when handling 1.0 mCi or more.
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