Table 4.
MCATK to MCNP software comparison of photon next-event estimator results for 8 tests using various cylinder materials and densities.
| Photon | MCATK-MCNP | ||
|---|---|---|---|
| Density | Energy | Difference | |
| Material | (g/cc) | (MeV) | (# Std Devs) |
| W | 7.5 × 10−5 | 0.003 | –6.9* |
| W | 1.0 × 10−3 | 0.015 | 0.4 |
| W | 5.6 × 10−2 | 0.13 | 1.2 |
| W | 2.6 | 2.0 | 1.3 |
| W | 2.0 | 60.0 | –1.8 |
| Concrete | 1.9 | 2.0 | –0.1 |
| Water | 1.5 | 2.0 | –0.2 |
| Fe | 2.3 | 2.0 | –1.2 |
* Difference ( 6 × 10−14 ), probably due to round-off
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