Table 4 The \(\upgamma\) emissions used to calculate the intrinsic detector efficiency
Isotope | Energy (keV) | Intensity (%) | Activity (kBq) |
|---|---|---|---|
\(^{210}\)Pb | 46 | 4.25 ± 0.04 | 32.82 ± 0.34 |
\(^{241}\)Am | 60 | 35.9 ± 0.4 | 276.2 ± 1.0 |
\(^{133}\)Ba | 81 | 32.9 ± 0.3 | 129.30 ± 0.88 |
\(^{109}\)Cd | 88 | 3.644 ± 0.016 | 75.54 ± 0.46 |
\(^{177}\)Lu | 113 | 6.23 ± 0.04 | 512.3 ± 2.5 |
\(^{99\text {m}}\)Tc | 140 | 89 ± 4 | 170.6 ± 1.5 |
\(^{123\text {m}}\)Te | 159 | 84.0 ± 0.4 | 58.325± 0.085 |
\(^{139}\)Ce | 166 | 79.90 ± 0.04 | 50.75 ± 0.51 |
\(^{177}\)Lu | 208 | 10.41 ± 0.04 | 512.3 ± 2.5 |
\(^{133}\)Ba | 356 | 62.05 ± 0.19 | 129.30 ± 0.88 |