CARBON - 14
|Physical Half-life: ||5730 years
|Radiations:||-ß 156 keV
|External Exposure:||Low energy ß,
not external hazard, radiation badge not necessary.
||ALI ||2 mCi|
||Whole body and fat|
||None is recommended. Range of ß in air is 10" and 0.010" in
|LSC (Eff. ~85%)
Thin-window GM (Eff. ~5%)
- Work with volatile forms or procedures that may produce volatile
compounds, (i.e., 14CO2), must be done in a fume
- 14C has a long half-life, do not correct for radioactive
- Some 14C labeled compounds may penetrate the skin. Wear
two pairs of gloves and change the outer layer frequently.
- Use caution when handling 14C labeled halogenated acids.
These penetrate the skin and give high radiation doses.
- Most 14C compounds are rapidly metabolized and exhaled as
- Do not cover the thin-window of your GM survey meter with a cap,
plastic or parafilm; they will shield the detector and you will not be
able to detect low energy beta emitters like 14C.