 |
|||
|
|
|||
|
|
|||
| ||||||||||
|
|  DOE-HDBK-1106-97
Radiological Contamination Control Training
for Laboratory Research
Student's Guide
COBALT-57 (Co-57)
Cobalt-57 is an X-ray emitter. Most common means of detection is with a thin-window G-M probe.
1.
Maximum energy: X-ray radiation from 0.014 to 0.692 MeV (0.122 MeV emitted 85.5%
of the time).
IAEA toxicity classification: Medium-low.
2.
3.
Physical half-life: 270.9 days.
4.
Effective half-life (Teff): 9 days.
5.
Critical organ: Lower large intestine.
6.
Personnel monitoring: Dosimeter, uptakes may be evaluated by whole body counting.
7.
ALI:
0.7 mCi (3 x 107 Bq) by inhalation, yearly clearance.
o
4 mCi (2 x 108 Bq) by ingestion.
o
8.
Shielding: 3.2 mm of lead is the first half value layer.
A-16
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals