Development of Heterojunction Diode-Type Gamma Ray Detectors Based on Epitaxially Grown Thick CdTe on$hboxn^+$-Si Substrates |
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Authors: | Yasuda K. Niraula M. Noda K. Yokota M. Ohashi H. Nakamura K. Omura M. Shingu I. Minoura S. Tanaka R. Agata Y. |
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Affiliation: | Graduate Sch. of Eng., Nagoya Inst. of Technol.; |
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Abstract: | Room temperature nuclear radiation detectors with energy discrimination capability developed by growing thick cadmium telluride (CdTe) epitaxial layers directly on n+-Si substrates in a metal-organic vapor phase epitaxy system is reported for the first time. The CdTe/n+-Si heterojunction diode detector exhibited good rectification and charge collection properties. The reverse leakage currents were typically 1times10-7 to 5times10-7 A/cm2 at 50-V bias. The detector clearly demonstrated its energy discrimination capability by resolving gamma peak from the 241Am radioisotope during radiation detection test at room temperature |
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