Gamma Radiation Exposure Rate

Gamma Radiation Exposure Rate

RI-03
ASPCSPAdvanced

Formula
S ≈ 6CEF
When to Use

Estimate gamma radiation exposure rate at 1 foot from a source. Accurate to ±20%.

Symbol Legend
SymbolMeaningUnitNote
SExposure rate at 1 footR/hr
CSource strength )Curies (Ci
EPhoton energyMeVFrom nuclide handbook
FFractional yield of photons per disintegrationFrom nuclide handbook

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