Fano factor evaluation of diamond detectors for alpha particles

線に対する単結晶CVDダイヤモンド放射線検出器のFano因子評価

嶋岡 毅紘*; 金子 純一* ; 佐藤 優樹  ; 坪田 雅功*; 新名 宏明*; 茶谷原 昭義*; 渡辺 幸志*; 梅沢 仁*; 杢野 由明*

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 = 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.