Concentration Of Th-228, Ra-226, Cs-137, and K-40 In Soil At Several Places In West Java Province

Analysis of 228 Th, 226 Ra, 137 Cs, and 40K in the soil samples at several places in West Java Propince have been conducted. The measurements of 228 Th, 226 Ra, 137 Cs, and 40K concentration were done using gamma spectrometer with HP-Ge detector. The aim of the analysis is to obtain base line data on environmental radioactivity at several places in West Java Propince. The results of analysis showed that 228 Th concentration ranges from undetectable (< 0,25 Bq/kg) to (14,75 Bq/kg) with the average of (8,24 n 0,19 Bq/kg), 226 Ra concentration ranges from undetectable (< 0,35 Bq/kg) to (276,73 Bq/kg) with the average of (46,60 n 0,30 Bq/kg), 137Cs concentration ranges undetectable (< 0,10 Bq/kg) to (1,38 Bq/kg) with the average (0,97 n 0,08 Bq/kg), 40K concentration ranges from undetectable (< 1,36 Bq/kg) to (26,58 Bq/kg) with the average of (15,27 n 0,27 Bq/kg)