| http://www.w3.org/ns/prov#value | - Preferred radioisotopes are selected from the group of gamma emitters (or x-ray emitters) with energies less than about 300 KeV such as I-125, Pd-103, As-73, Gd-153, or the high-energy beta emitters (Emax>1.5 meV) including P-32 and W/Re-188, or others as may be deemed suitable for a particular use.
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