High-performance diamond radiation detectors produced by lift-off method Takehiro Shimaoka, Junichi H. Kaneko, Masakatsu Tsubota, Hiroaki Shimmyo, Hideyuki Watanabe, Akiyoshi Chayahara, Hitoshi Umezawa and Shin-ichi Shikata EPL, 113 6 (2016) 62001 Published online: 18 April 2016 DOI: 10.1209/0295-5075/113/62001