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Performance improvement of Si(Li) Peltier cooled detectors

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4 Author(s)
A. Sokolov ; Baltic Sci. Instrum., Riga, Latvia ; V. Gostilo ; A. Loupilov ; V. Zalinkevich

The spectrometric performance of Si(Li) Peltier cooled detectors was improved due to better electronics, a small-sized vacuum chamber, and an effective five-channel Peltier cooler, which provided a temperature difference of 132°C at a sensitivity to heat loading that is less than 15 mWt/°C. This allowed us to fabricate circular Si(Li) Peltier cooled detectors with a thickness of 4-4.5 mm and a sensitive surface from 12 to 100 mm2. Their energy resolution at an energy of 5.9 keV was from 158 to 253 eV depending on the sensitive surface area, while on 59.6 keV it was from 410 to 460 eV. Rectangular detectors with a thickness 4-4.5 mm and sensitive surface area 60 mm2 had an energy resolution of 255 and 450 eV for energies of 5.9 and 59.6 keV, respectively.

Published in:

IEEE Transactions on Nuclear Science  (Volume:49 ,  Issue: 5 )