Figure 3
Energy spectrum of eight-channel linear-array detectors measured by 57Co. Note the photopeaks at 14.4, 122 and 136 keV. Eight-channel CZT linear array (HB-4); 1.2 mm thick; 175 × 800 µm area; 500 µm pitch; V = −400 V. 0.2 µCi 57Co. 0.25 µs shaping; ×100 gain; 20 h counting. |