Fast Neutron Detection Using Pixelated CdZnTe Spectrometers

Energy and Position Reconstruction in Pixelated CdZnTe Detectors

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiv

Charge sharing in common-grid pixelated CdZnTe detectors

The charge sharing effect in pixelated CdZnTe (CZT) detectors with a common anode steering grid has been studied. The impact on energy resolution of weighting potential cross-talk and ballistic deficit due to cathode signal shaping has been investigated. A detailed system modeling package considering charge induction, electronic noise, pulse shaping, and ASIC triggering procedures has been deve...

3-D position sensitive CdZnTe gamma-ray spectrometers

Two 3-D position-sensitive room temperature semiconductor c-ray spectrometers have been built using 1 cm3 cubic CdZnTe crystals. The lateral coordinates of c-ray interaction are obtained from the location of the 11(x)]11(y) pixellated anodes and the depth (z) is obtained from the ratio of the signals coming from the cathode and the anode. Energy spectra from 662keV incident c-rays have been col...

Charge Collection Characteristics of Frisch Collar CdZnTe Gamma Ray Spectrometers

A collimated Au source was used to determine the charge collection efficiency (CCE) at several locations along the length of a 3.4 x 3.4 x 5.5 mm CdZnTe bar detector both in planar configuration and with Frisch collars of varying length. For each configuration, a 0.50 mm long region spanning the width of the device was irradiated with 411 keV gamma rays produced by a neutron activated gold foil...

Predicted Performance of Neutron Spectrometers Using Scintillating Fibers