Figure 5. Surface exhalation rate of radon for different building material samples

From

Measurement of Uranium Concentrations, Radium Content and Radon Exhalation Rate in Iraqian Building Materials Samples

Abdalsattar K Hashim, Laith A. Najam

International Journal of Physics. 2015, 3(4), 159-164 doi:10.12691/ijp-3-4-4