Fig. 1.
Fig. 2.
Fig. 3.
Fig. 4.
Fig. 5.
Fig. 6.
Fig. 7.
Fig. 8.
Fig. 9.
Fig. 10.
Fig. 11.
Fig. 12.
Fig. 13.
The mean values of energy resolution of the 511 keV full energy peak for chosen count rates
| Count rate (kcps) | FWHM (%) |
|---|---|
| 2 | 3.70 |
| 5 | 3.70 |
| 10 | 3.71 |
| 15 | 3.68 |
| 20 | 3.68 |
| 25 | 3.67 |
| 30 | 3.67 |
| 35 | 3.67 |
| 40 | 3.66 |
| 45 | 3.66 |
| 50 | 3.65 |
| 55 | 3.65 |
| 60 | 3.64 |