Spectroscopic properties of large-volume virtual Frisch-grid CdMnTe detectors
| Autor: | Anwar Hossain, Aleksey E. Bolotnikov, Shinhaeng Cho, Chansun Park, Ralph B. James, Hong Taekwon, Pilsu Kim, Kyoungwon Kim, Jinseo Lee |
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| Rok vydání: | 2015 |
| Předmět: |
Physics
Signal processing Resolution (mass spectrometry) Physics::Instrumentation and Detectors business.industry Astrophysics::High Energy Astrophysical Phenomena Detector Gamma ray General Physics and Astronomy Particle detector Full width at half maximum Optics Volume (thermodynamics) Optoelectronics business Energy (signal processing) |
| Zdroj: | Journal of the Korean Physical Society. 66:1761-1765 |
| ISSN: | 1976-8524 0374-4884 |
| Popis: | 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 57Co, 22 Na, 133Ba, and 137Cs together or separately. Energy resolutions of 6.7% and 2.1% were obtained for 122-keV 57Co and 662-keV 137Cs 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 22Na 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 133Ba 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 × 10 −3 cm2/V. These results show the possibility of using CMT detectors in response to various requirements for gamma-ray detection at room-temperature. |
| Databáze: | OpenAIRE |
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