Ga-67

[Jim Graham <jgram@lamar.colostate.edu>]

I have some vials of Ga-67 that are  several years old, yet I am getting
several photon peaks from the vial. The approximate energies are 25,
120, 520, and 670 keV. Since Ga-67 has a short half-life (78 hrs) and
the progeny (Ge-67) also has a short half-life (19 min.) I am at a loss
as to what I am seeing. Is there another isotope contaminating the
sample that is an impurity in the production of Ga-67 or is there
another explanation? The only other isotope being used in the lab is
Indium. I would appreciate any advice.

--
James C. Graham - Radiation Safety Officer
Environmental Health Services
Colorado State University
Fort Collins, Colorado 80523-6021
Off: 970-491-3736  Fax: 970-491-4804
jgram@lamar.colostate.edu