Biomedical Engineering Reference
In-Depth Information
Fig. 3.12
Decay scheme of
2
11
Na.
The radiation-protection problems associated with positron emitters include all
those of
β
-
emitters (direct radiation and possible bremsstrahlung) and then some.
As already mentioned, the 0.511-MeV annihilation photons are always present. In
addition, because of the competing process of electron capture, characteristic X rays
can be expected.
Example
Refer to Appendix D and deduce the decay scheme of
2
13
Al.
