Spectroscopic properties of large-volume virtual Frisch-grid CdMnTe detectors
- Authors
- Kim, K. H.; Park, Chansun; Kim, Pilsu; Cho, Shinhaeng; Lee, Jinseo; Hong, T. K.; Hossain, A.; Bolotnikov, A. E.; James, R. B.
- Issue Date
- 6월-2015
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- CdMnTe; CdZnTe; Frisch-grid; Traveling heater method; Mobility-lifetime product
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.66, no.11, pp.1761 - 1765
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 66
- Number
- 11
- Start Page
- 1761
- End Page
- 1765
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/93347
- DOI
- 10.3938/jkps.66.1761
- ISSN
- 0374-4884
- Abstract
- CdMnTe(CMT) is a promising alternative material for use as a room-temperature radiation detector. Frisch-grid detectors have a simple configuration and outstanding spectral performance compared with other single-carrier collection techniques. The energy resolution of large-volume virtual Frisch-grid CMT detectors was tested by using several isotopes such as Co-57, (22) Na, Ba-133, and Cs-137 together or separately. Energy resolutions of 6.7% and 2.1% were obtained for 122-keV Co-57 and 662-keV Cs-137 gamma rays, respectively, without using any additional signal processing techniques. Also, a 12-mm-thick CMT detector detected the 511-keV and 1.277-MeV gamma peaks of Na-22 with values of the full width at half maximum (FWHM) of 2.7% and 1.5%, respectively. In addition, multiple low- and high-energy gamma peaks of Ba-133 were well separated. The mobilitylifetime product calculated from the shift of the 662-keV photo-peak vs. bias by using Hecht's equation was 7 x 10 (-3) cm(2)/V. These results show the possibility of using CMT detectors in response to various requirements for gamma-ray detection at room-temperature.
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