Temperature calibration formula for activated charcoal radon collectors

► The temperature effect on radon adsorption is proportional to αeβ/T. ► The calibration formula is CF(T,t)=3.1×10−5e2887(T+273)[1−e−0.080t]. ► The radon adsorption efficiency varies up to a factor of two for T = 8.5-31 °C. ► The average temperature is suitable for estimating CF(T,t) in a fluctuating environment.