It is very interesting work as we try to correlate radon and radium content data. As radon is produced from radium in soil, so in absence of any radon source other than that distributed in soil, we should get excellent correlation. In a measurement over Jaduguda Tailing pond Dr.B.K.Sahoo, BARC got that, in my paper earlier in 1988 I assumed that. Now, if there is any other source of radon then this correlation breaks down i.e., it becomes poor. It is an indication of either buried source of radon or some fracture due to earthquake through which radon is transported [Dr.R.C.Ramola in 2008 publication in Rad. Meas. highlighted that]. This happens to be new theory.
Pattama Pisapak investigated the correlation between concentrations of radon (222Rn) and radium (226Ra) in soil and to estimate the potential natural radiation hazard indices in Southern Thailand, Songkhla province, Namom district. To achieve his work, the concentration of radon was measured by RTM1688-2 radon monitor and radium content was made using a high-resolution gamma spectrometer. See Pisapak, P., Todorovic, N. & Bhongsuwan, T. Environ Earth Sci (2017) 76: 139. https://doi.org/10.1007/s12665-017-6439-6
Additionally, the following scientists authored publications in the related field: Isam Salih and David S. Vinson (see the attached files).
Hi,
good technical document from which start is UNSCEAR 2000 SOURCES AND EFFECTS OF IONIZING RADIATION, ANNEX B, from Page 97, § 1. Source of Radon, to Page 108.
In particular from Point 95.
Attached at this post some image extracted from the UNSCEAR document.
Best Regards
Link:
http://www.unscear.org/docs/publications/2000/UNSCEAR_2000_Annex-B.pdf
When you want link the Radium concentration in soil and Radon concentration, please, is important the soil conditions, such as porosity, density, water content...
In the excellent work by Isam Salih et al., IDW method of interpolation produces the coefficient of correlation (R^2 = 0.50) between bedrock uranium/radium and radon in ground water. So here we have radon data collected right over uranium enriched area (150 x 134 km). IDW generated radon data (y axis) when plotted over bedrock uranium/radium data (x axis), it is expected to give significant intercept on y axis as I see in the paper "Statistical model for the recognition of buried uranium deposit".
In another work, mentioned by G.S.C.Joel, Rn^222 activity is found to be high in Rolesville granite with corresponding Ra^226 high activity. So good correlation should be obtained. It is not unsupported radon. So we, in the first place gather data on soil radium concentration and then get the data on radon concentration in soil sampling holes. It will be much interesting.
The correlation relation between the concentrations of Radium-226 and Radon -222. A good correlation factor must be near one.
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