RE: High Energy Gamma Emitter

[broseus%nihrsb.dnet@dxi.nih.gov (Roger W. Broseus, Ph.D. Email to RogerB@nih.gov)]

Don:  I encountered a similar problem when trying to calibrate a gamma 
dector for use around an accelerator.  I *made* some Na-24 to use as an energy
calibration source.  And, you can calibrate on sum-peaks if you can see them
with the detector, e.g., in the case of NaI.  Of course it's easy to make some
Na-24 if you've got a neutron source.  Just put a vial of NaC03 or other Na-
compound next to the target of an accelerator where the neutron flux is high.

There might be emitters of higher E gammas.  I've not given that much thought
because the above worked for me.

Do us a favor: if you find a good answer, put it out on radsafe.

Best regards,

-- Roger