Author/Authors :
Doty، نويسنده , , F.P. and Lingren، نويسنده , , C.L. and Apotovsky، نويسنده , , B.A. and Brunsch، نويسنده , , J. and Butler، نويسنده , , J.F and Collins، نويسنده , , T. and Conwell، نويسنده , , R.L. and Friesenhahn، نويسنده , , S. and Gormley، نويسنده , , J. and Pi، نويسنده , , B. and Zhao، نويسنده , , S. and Augustine، نويسنده , , F.L. and Bennett، نويسنده , , B.A. and Cross، نويسنده , , E. and James، نويسنده , , R.B.، نويسنده ,
Abstract :
A 3 cm3 multichannel gamma spectrometer for DOE applications is under development by Digirad Corporation. The device is based on a position sensitive detector packaged in a compact multi-chip module (MCM) with integrated readout circuitry. The modular, multichannel design will enable identification and quantitative analysis of radionuclides in extended sources, or sources containing low levels of activity. The MCM approach has the advantages that the modules are designed for imaging applications, and the sensitivity can be arbitrarily increased by increasing the number of pixels, i.e. adding modules to the instrument. For a high sensitivity probe, the outputs for each pixel can be corrected for gain and offset variations, and summed digitally. Single pixel results obtained with discrete low noise readout indicate energy resolution of 3 keV can be approached with currently available CdZnTe. The energy resolution demonstrated to date with MCMs for 511 keV gamma rays is 10 keV.
