Development of methods to use CdTe detectors in field measurements

Investigation into the properties of CdTe detectors for in-situ measurements

“…10(b), reveals a phenomenon similar to what was seen for the events belonging to the tail in case of the small planar detector (see Ref. [8]). A fast increase in amplitude (due to the electron current) is followed by a much slower increase (due to the hole current).…”

“…2. The pulse-height distribution from the planar detector is similar to that reported for the small planar detector before correction [8]. It is quite different from the hemispheric detector.…”

“…Increasing the applied high voltage, hence decreasing the charge-collection time increases the separation of the events from the diagonal but not to such an extent that the simple algorithm developed in Ref. [8] can be successfully applied.…”

“…The pulse shape, therefore, is strongly dependent on where in the crystal the energy is deposited. We have previously reported results obtained with a small 5 Â 5 Â 2 mm 3 detector feeding the preamplifier output to two shaping amplifiers in parallel with different shaping times [8]. Fig.…”

A 2D 4×4 channel readout ASIC for pixelated CdTe detectors for medical imaging applications

“…Despite all the positive properties mentioned above, the energy resolution of CdTe detectors is severely reduced due to their poor charge collection efficiency [6,7]. Nevertheless, by estimating the depth of interaction (DOI) of the photon inside the detector, the resolution can be improved dramatically [8,9,10].…”