Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Growth and characterization of detector-grade CdMnTeSe

  • J. Byun (Dept. of Health and Safety Convergence Science, Korea University) ;
  • J. Seo (Dept. of Health and Safety Convergence Science, Korea University) ;
  • J. Seo (Dept. of Health and Safety Convergence Science, Korea University) ;
  • B. Park (Dept. of Health and Safety Convergence Science, Korea University)
  • Received : 2022.04.19
  • Accepted : 2022.06.07
  • Published : 2022.11.25
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Abstract

The Cd0.95Mn0.05Te0.98Se0.02 (CMTS) ingot was grown by the vertical Bridgman technique at low pressure. All wafers showed high resistivity, which suggests potential as a room-temperature semiconductor detector. The resistivity of the CMTS planar detector was 1.47 × 1010 Ω·cm and mobility lifetime product of electrons was 1.29 × 10-3 cm2/V. The spectroscopic property with Am-241 and Co-57 was evaluated. The energy resolution about 59.5 keV gamma-ray of Am-241 was 11% and the photo-peak of 122 keV gamma-ray from Co-57 was clearly distinguished. The result shows the first detector-grade CMTS in the world and proves CMTS's potential as a radiation detector operating at room temperature.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2021R1A2C1012161), by Ministry of Environment as "the Graduate school of Particulate matter specialization" and by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (20214000000070, Promoting of expert for energy industry advancement in the field of radiation technology).

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