0000000000307317
AUTHOR
Vladimir Gostilo
Spectroscopic response of a CdZnTe multiple electrode detector
Abstract The spectroscopic performances of a CdZnTe detector (crystal size: 5×5×0.9 mm 3 ) with five electrodes (cathode, anode and three steering electrodes) were studied. The anode layout, which consists of a circular electrode ( φ =80 μm) surrounded by two ring electrodes (gap=100 μm; radial width Δ r =100 μm) and by one electrode that extends to the edge of the crystal, is mostly sensitive to the electron carriers, overcoming the well known effect of the hole trapping in the measured spectra. We report on the spectroscopic response of the detector at different bias voltages of the electrodes and at various photon energies ( 109 Cd, 241 Am and 57 Co sources). The CdZnTe detector exhibits…
Probe prototypes based on TlBr detectors
Abstract Detectors based on TlBr crystals are ideally suited for the probes, where small size and rapid stopping power are highly desirable attributes. The development results of TlBr probes for medical and nuclear industry applications are presented here. Probes for both applications include TlBr detectors with dimensions of 5×5×2 mm 3 and a microelectronics preamplifier. The different construction and technological aspects of probes designed for both application types are discussed. The probes were tested over a wide energy range. We obtained energy resolutions of 3.6, 4.9 and 14.5 keV at energies of 59.6, 122 and 662 keV, respectively, for the developed probe prototypes at room temperatu…
Optical investigations of TlBr detector crystals
Shift of fundamental absorption edge, the position of main luminescence bands, the luminescence decay and transient absorption spectra in three TlBr crystals were studied. The γ-quanta detector made from TlBr crystals with similar transient absorption and luminescence parameters shows similar detector properties. The iodine impurity in TlBr was detected by optical methods. The role of impurities and crystal defects in γ-quanta detectors manufactured is discussed.