Improvement of the energy resolution of CdTe detectors by pulse height correction from waveform

Details Improvement of the energy resolution of CdTe detectors by pulse height correction from waveform Improvement of the energy resolution of CdTe detectors by pulse height correction from waveform

2011-11-07

arxiv.org/abs/1111.1711v2

Physics

Instrumentation and Detectors

9 pages, 13 figures, submitted to Nucl. Instr. and Meth. A

Scientific paper

Semiconductor detectors made of CdTe crystal have high gamma-ray detection efficiency and are usable at room temperature. However, the energy resolution of CdTe detectors for MeV gamma-rays is rather poor because of the significant hole trapping effect. We have developed a method to improve the energy resolution by correcting the pulse height using the waveform of the signal and achieved 2.0% (FWHM) energy resolution for 662keV gamma-rays. Best energy resolution was achieved at temperatures between -10 degrees C and 0 degrees C.

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