Table 2.
The RMSD and the COV calculated against the recorded spectra measured by all of the comparators of the DXMCT-1. The numbers in brackets below the tube current values are the mean counts per keV between 30 and 150 keV.
| Scheme | Tube current (μA) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 25 [30.9] | 50 [63.9] | 75 [97.4] | 100 [119.6] | 200 [192.9] | 300 [234.7] | 400 [261.6] | 500 [277.5] | |||
| NPa, NModel(E)b | 10.8 | 7.8 | 11.1 | 12.3 | 53.0 | 73.9 | 85.3 | 87.5 | ||
| RMSD | NPa, aR×S0(E)c | 6.6 | 17.3 | 30.8 | 37.2 | 62.7 | 80.5 | 104.4 | 128.8 | |
| [counts] | Pd, NModel(E)b | 3.7 | 1.7 | 5.8 | 4.5 | 10.0 | 17.1 | 41.3 | 71.8 | |
| Pd, aR×S0(E)c | 3.9 | 7.5 | 11.6 | 16.5 | 49.7 | 95.2 | 130.5 | 153.3 | ||
| NPa, NModel(E)b | 32.7 | 11.7 | 11.6 | 10.2 | 27.3 | 31.3 | 32.4 | 31.3 | ||
| COV | NPa, aR×S0(E)c | 20.2 | 25.9 | 32.1 | 30.7 | 32.3 | 34.1 | 39.6 | 46.0 | |
| [%] | Pd, NModel(E)b | 11.3 | 2.6 | 6.0 | 3.7 | 5.2 | 7.2 | 15.7 | 25.7 | |
| Pd, aR×S0(E)c | 12.0 | 11.3 | 12.1 | 13.6 | 25.6 | 40.3 | 49.5 | 54.8 | ||
a
Nonparalyzable detection model.
b
Estimated by pulse pileup model, Eq. 6.
c
PDF of incident spectrum S0(E) scaled by aR.
d
Paralyzable detection model.