Determination of Activity Concentration of Natural Radionuclides and Radiation Hazards’ Assessment of Building Materials in High Background Radiation Areas of Homa and Ruri, Kenya

Table 2

Activity concentration of⁴⁰K, ²²⁶Ra, and ²³²Th (Bq/kg) in Ruri samples.

Sample ID	^226Ra (Bq/kg)	^232Th (Bq/kg)	^40K (Bq/kg)
Ruri1	92 ± 5	1190 ± 60	580 ± 29
Ruri2	103 ± 5	1843 ± 92	451 ± 23
Ruri3	81 ± 4	724 ± 36	526 ± 26
Ruri4	21 ± 2	403 ± 20	333 ± 17
Ruri5	63 ± 3	2152 ± 108	320 ± 16
Ruri6	71 ± 4	1550 ± 78	742 ± 37
Ruri7	110 ± 6	1486 ± 74	739 ± 37
Ruri8	226 ± 11	1058 ± 53	487 ± 24
Ruri9	145 ± 7	896 ± 45	566 ± 28
Ruri10	189 ± 9	929 ± 46	306 ± 15
Ruri11	46 ± 2	873 ± 44	156 ± 8
Ruri12	87 ± 4	1236 ± 62	731 ± 37
Ruri13	196 ± 10	1201 ± 60	812 ± 41
Ruri14	174 ± 9	580 ± 29	358 ± 18
Ruri15	68 ± 3	298 ± 15	221 ± 11
Average	111 ± 6	1094 ± 55	489 ± 24