SODIUM - 22
|Physical Half-life: ||2.6 years
Gamma/x511(180%) & 1275 keV
|External Exposure:||External hazard. Radiation dose
from 1 mCi of 22Na is 128.6 mR/hr from gamma/x and 5168
mRads/hr from +
▀ at 10 cm away.
||ALI ||0.4 mCi (ingestion), 0.6 mCi (inhalation)|
||Whole body and gastrointestinal tract|
||Urinalysis (Not routinely done.)|
||HVL 0.7 cm of lead; TVL 2.79 cm of lead
|LSC (Eff. ~90%)
NaI Gamma Counter (Eff. 30-60%)
- Use forceps with rubber sleeves to handle unshielded sources and
potentially contaminated vessels, and work at arms length.
- Near a 22Na source, beta radiation doses can be much
higher than the gamma dose.
- Shielding the high energy gamma radiation with lead will also stop
all of the ▀'s and Bremstralung radiation.
- Always store 22Na vials in lead containers or behind
- Wear a radiation badge when handling 1.0 mCi or more.
For additional information contact the Radiation Safety Program
Updated May 28, 2002 by SAK
University of Wisconsin-Milwaukee
Department of Environmental Health, Safety and Risk Management
ęUniversity of Wisconsin Board of Regents, 2002