Co-57 decays by electron capture to the stable Fe-57 with convenient emissions of 122 keV (87%) and 136 keV (11%). Energy (number / 100 disintegrations) 0.7066 (0.18)
0.1364 (99.82)
Prepared by Luid E. Diaz, M.D.
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Douglas J. Wagenaar, Ph.D., wagenaar@nucmed.bih.harvard.edu