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Table 1
Comparison between calculated (present work), experimental (Byun et al., 2004) and simulated (Byun et al., 2004) total efficiencies for an isotropic radiating axial point sources placed at the center of a 4πNaI(Tl) (30.6 × 30.6 × 40.6 cm3) detector with a central rectangle hole (10.2 × 10.2 × 40.6 cm3).
| Radioisotope | Eγ (MeV) | Exp. (Byun et al., 2004) | M.C. (Byun et al., 2004) |
Present work | Δ1% | Δ2% |
|---|---|---|---|---|---|---|
| 22Na | 0.511 | 0.912 ± 0.002 | 0.911 ± 0.001 | 0.901 | −1.221 | −1.110 |
| 137Cs | 0.662 | 0.947 ± 0.028 | 0.896 ± 0.001 | 0.890 | −6.404 | −0.674 |
| 60Co | 1.173 | 0.861 ± 0.003 | 0.845 ± 0.001 | 0.867 | 0.692 | 2.538 |
| 22Na | 1.275 | 0.857 ± 0.003 | 0.837 ± 0.001 | 0.860 | 0.349 | 2.674 |
| 60Co | 1.332 | 0.854 ± 0.004 | 0.832 ± 0.001 | 0.858 | 0.466 | 3.030 |
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