Radioactive Disequilibrium between ²²²Rn and Its Daughter Nuclides in Ground Water

Abstract

The radioactive disequilibrium between²²²Rnand its daughter nuclides²¹⁴Pband²¹⁴Biincluded in situ ground water has been investigated for three locations. Water samples collected carefully in 100mL Teflon vials were immediately transported to the laboratory and measured with a low-background Ge spectrometer. It has been shown that²²²Rnand its daughters²¹⁴Pband²¹⁴Biin ground water are not in radioactive equilibrium and deduced radioactivities of daughter nuclides are ranged from 0.5 to 38.5% of that of radon by fitting the growth decay curves.