The RHH I-125 entry is from Unger and Truby (ORNL/RSIC-45), Specific Gamma- Ray Dose Constants. Their value is 7.432 E-5 mSv/h per MBq at 1 m, which converts to 0.275 rem/h per Ci at 1 m. The specific photons included in the calculation are: Energy Probability 27.2 0.3923 27.5 0.732 31.0 0.2541 35.5 0.0649 SLABACK@MICF.NIST.GOV ...a little risk, like a bit of spice, adds flavor to life