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Table 2
Comparison between relative total efficiencies of 0.511 MeV 22Na axial point source placed at different positions inside the square hole of the parallelepiped detector.
| h (cm) | Relative total efficiency (Byun et al., 2004) | Total efficiency [present work] | Relative total efficiency [present work] | Δ2% |
|---|---|---|---|---|
| 0 | 1 | 0.901 | 1 | 0 |
| 2 | 0.997 ± 0.01 | 0.900 | 0.998 | 0.100 |
| 4 | 0.990 ± 0.01 | 0.897 | 0.995 | 0.503 |
| 6 | 0.977 ± 0.01 | 0.887 | 0.984 | 0.711 |
| 8 | 0.962 ± 0.01 | 0.877 | 0.973 | 1.131 |
| 10 | 0.936 ± 0.01 | 0.857 | 0.951 | 1.577 |
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