| Samples | 81 (keV) | 356 (keV) | 662 (keV) | 1173 (keV) | 1332 (keV) |
1 | Yellow Iraqi granite | 0.162 ± 0.0011 | 0.089 ± 0.0045 | 0.074 ± 0.0052 | 0.043 ± 0.0044 | 0.042 ± 0.0046 |
2 | Orange Spanish granite | 0.187 ± 0.0027 | 0.089 ± 0.0048 | 0.078 ± 0.0050 | 0.048 ± 0.0048 | 0.049 ± 0.0044 |
3 | Red Indian granite | 0.201 ± 0.0024 | 0.098 ± 0.0077 | 0.073 ± 0.0041 | 0.044 ± 0.0038 | 0.042 ± 0.0047 |
4 | Grey Chinese granite | 0.174 ± 0.0064 | 0.089 ± 0.0051 | 0.076 ± 0.0072 | 0.045 ± 0.0065 | 0.041 ± 0.0034 |
5 | Colored Egyptian granite | 0.170 ± 0.0041 | 0.093 ± 0.0040 | 0.079 ± 0.0053 | 0.049 ± 0.0050 | 0.044 ± 0.0034 |
6 | White Turkish granite | 0.143 ± 0.0048 | 0.094 ± 0.0063 | 0.081 ± 0.0032 | 0.048 ± 0.0043 | 0.044 ± 0.0074 |
7 | Lead | ---------- | ----------- | 0.091 ± 0.0070 | 0.064 ± 0.0050 | 0.061 ± 0.0084 |