Figure 4. Correlation between radium concentration and mass exhalation rate

From

Determination of Radium and Radon Exhalation Rates in Soil Samples Collected from Kerbala Governorate

Abbas J. Al- Saadi, Abdalsattar K. Hashim, Hayder J. Musa

International Journal of Physics. 2015, 3(5), 208-212 doi:10.12691/ijp-3-5-2