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Table 8 Average and maximum recoil distances of radium isotopes in quartz which is chosen as the host due to the mineralogical composition of the aquifer

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

Decay Average distance (Å) Maximum distance (Å)
230Th → 226Ra 370.3 663.2
232Th → 228Ra 331.3 609.8
228Th → 224Ra 406.6 763.3
  1. Data originate from Sun and Semkow (1998)