Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1822441 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2015 | 4 Pages |
Abstract
Si PIN photodiode radiation detectors with three different active areas (3Ã3 mm2, 5Ã5 mm2, and 10Ã10 mm2) were designed and fabricated at the Korea Atomic Energy Research Institute (KAERI) for low energy X- and gamma-ray detection. In Si-based semiconductor radiation detectors, one of the noise sources is thermal noise, which degrades their energy resolution performance. In this study, the temperature effects on the energy resolution were investigated using a 3Ã3 mm2 active area PIN photodiode radiation detector using a Thermoelectric Module (TEM) from room temperature to â23 °C. Energy resolutions from 25 keV auger electrons to 81 keV gamma-ray from a Ba-133 calibration source were measured and compared at every 10 °C interval. At â23 °C, energy resolutions were improved by 15.6% at 25 keV, 4.0% at 31 keV, and 1.2% at 81 keV in comparison with resolutions at room temperature. CsI(Tl)/PIN photodiode radiation detectors were also fabricated for relatively high energy gamma-ray detection. Energy resolutions for Cs-137, Co-60, and Na-22 sources were measured and compared with the spectral responsivity.
Related Topics
Physical Sciences and Engineering
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Instrumentation
Authors
Han Soo Kim, Manhee Jeong, Young Soo Kim, Dong Hun Lee, Seung Yeon Cho, Jang Ho Ha,