Advances in Materials Science and Engineering Assessment of Gamma Radiation Hazards Related to Geologic Materials: Comparison of Results by Field Gamma Spectrometry and Laboratory Methods

Figure 4

Plots of the results from laboratory analyses (ICP, XRF, and LGS: laboratory gamma spectrometry) against field estimations: (a) ²²⁶Ra activity concentration; (b) ²³²Th activity concentration; (c) ⁴⁰K activity concentration; (d) activity concentration index calculated from the isotopes estimations.

(a)

(b)

(c)

(d)