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Report No.

Fano factor evaluation of diamond detectors for alpha particles

Shimaoka, Takehiro*; Kaneko, Junichi* ; Sato, Yuki  ; Tsubota, Masakatsu*; Shimmyo, Hiroaki*; Chayahara, Akiyoshi*; Watanabe, Hideyuki*; Umezawa, Hitoshi*; Mokuno, Yoshiaki*

Diamond radiation detectors have promising properties i.e. high-temperature operation, low leakage current and radiation hardness. The authors have developed CVD diamond detector using lift-off method. We have successfully obtained high performance detectors which have 100.1% of charge collection efficiency for holes and 99.8% for electrons, provided that $$varepsilon_{diamond}$$ = 13.1 eV. The detector also achieved approximate 0.3$$%$$ of one of the best energy resolution. This study reports a Fano factor evaluation of diamond detectors for alpha particles.



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