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Tuesday, August 19, 2014

Natural Radioactivity in Soil (Bq.Kg-1)


Country
Type of Radioactive Isotope

K-40
U-238
Ra-226
Th-232
India
400
29
29
64
China
440
33
32
41
Japan
310
29
33
28
USA
370
35
40
35
Russia
520
19
27
30
Spain
470
NA
32
33

Mean values are given from wide range of values
Courtesy: UNSCEAR, 2000