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Table 6 Radium activities (Bq kg−1) and their ratios measured in August 1986 from a brine sample collected from GB2 production well

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

Ra isotopes

Activity in brine

224Ra

9.1 ± 1.6

228Ra

12.1 ± 1.1

226Ra

22.9 ± 1.8

Isotopic ratio

Activity in brine

224Ra/228Ra

0.75 ± 0.20

228Ra/226Ra

0.53 ± 0.09

  1. Reported errors are 2σ uncertainties. Data are provided by EnBW and corrected for the site-specific fluid density of ρb = 1023.24 kg/m3