Compound decay patterns of 210Pb(RaD)-210Bi(RaE)-210Po(RaF) series

Many series nuclides contained in environmental substances were conducted by both physical decay process and some dynamical processes that consist of physical, chemical and biological processes. Physical decay process is remained after the stop of the dynamical processes by a sampling procedure and so on. Radiochemical determination of series nuclides, such as 210Bi and 210Po in a sample is done at the very state. The authors calculated and described the decay charts of 210Pb-210Bi-210Po series at several given initial radioactivity ratios of these nuclides in this report. (auth.)