Gamma Ray Spectrometric Analysis of Sand Samples from Selected Beaches along Kenyan Coastline

Table 1

Activity concentration of⁴⁰K, ²³⁸U, and²³²Th in the sand samples in this work.

Site	40K (Bq/kg)	238U (Bq/kg)	^232Th (Bq/kg)
Diani-1	1621 ± 81	103 ± 5	53 ± 2
Diani-2	1246 ± 62	105 ± 5	102 ± 5
Diani-3	1609 ± 80	100 ± 5	114 ± 5
Diani-4	1101 ± 55	90 ± 4	76 ± 3
Diani-5	2101 ± 105	118 ± 5	119 ± 5
Tiwi-1	1936 ± 96	72 ± 3	114 ± 5
Tiwi-2	1294 ± 64	73 ± 3	104 ± 5
Tiwi-3	2117 ± 105	86 ± 4	110 ± 5
Tiwi-4	1803 ± 90	95 ± 4	126 ± 6
Tiwi-5	1089 ± 54	107 ± 5	63 ± 3
Shelly-1	1064 ± 53	90 ± 4	121 ± 6
Shelly-2	1319 ± 65	69 ± 3	101 ± 5
Shelly-3	653 ± 32	95 ± 4	95 ± 4
Shelly-4	1331 ± 66	115 ± 5	108 ± 5
Shelly-5	1033 ± 51	94 ± 4	125 ± 6
Nyali-1	1190 ± 59	57 ± 2	128 ± 6
Nyali-2	1263 ± 63	43 ± 2	89 ± 4
Nyali-3	1066 ± 53	87 ± 4	122 ± 6
Nyali-4	774 ± 38	72 ± 3	117 ± 5
Nyali-5	907 ± 45	78 ± 3	101 ± 5
Kenyatta-1	1379 ± 68	107 ± 5	75 ± 3
Kenyatta-2	1578 ± 78	76 ± 3	96 ± 4
Kenyatta-3	1282 ± 64	108 ± 5	119 ± 5
Kenyatta-4	701 ± 35	104 ± 5	98 ± 4
Kenyatta-5	859 ± 42	90 ± 4	42 ± 2
Shanzu-1	1057 ± 52	89 ± 4	127 ± 6
Shanzu-2	1367 ± 68	45 ± 2	57 ± 2
Shanzu-3	726 ± 36	98 ± 4	93 ± 4
Shanzu-4	1139 ± 56	75 ± 3	106 ± 5
Shanzu-5	1023 ± 51	80 ± 4	49 ± 2
Average	1254 ± 62	87 ± 4	98 ± 4
World average [16]	420	33	45