Pixellated TlBr detectors with the depth sensing technique

The depth sensing technique has been introduced to a 1.8 mm thick pixellated thallium bromide (TlBr) detector in order to enhance the performance of the device. Significant improvement of the energy resolution has been achieved with the device. An energy resolution of 2% FWHM at 662 keV was recorded with the device after the depth correction and rejection.