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Table 10 Recoil efficiency for radium (eRa) relative to 222Rn (data originate from Krishnaswami et al. 1982) as well as model-derived rates of alpha-recoil supply (Pr) for the geothermal system in Bruchsal

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

Decay

eRa ()

Pr (atoms kg−1 s−1)

230Th → 226Ra

0.961

40

232Th → 228Ra

0.769

25

227Th → 223Ra

0.961

1.7

228Th → 224Ra

0.897

41