Skip to main content

Science – Society – Technology

Table 11 Model-derived rates of diffusional flux FRa as a function of the effective diffusion length \(\varvec{ }(\phi^{\varvec{*}} \varvec{ }\sqrt {D_{m} /\lambda }\)) for radium isotopes

From: Water–rock interactions in the Bruchsal geothermal system by U–Th series radionuclides

Decay \(\phi^{\varvec{*}} \varvec{ }\sqrt {D_{m} /\lambda } (cm)\) FRa (atoms cm−2 s−1)
230Th → 226Ra 69 1.3 × 10−1
232Th → 228Ra 4.2 2.9 × 10−2
227Th → 223Ra 0.3 3.5 × 10−4
228Th → 224Ra 0.2 5.3 × 10−3