%0 Journal Article
%T Electrical properties of alpha-particle detectors based on CVD diamond films<br>金刚石膜α粒子探测器的电学性能研究
%A Wang Lin-Jun
%A Liu Jian-Min
%A Su Qing-Feng
%A Shi Wei-Min
%A Xia Yi-Ben
%A <br>王林军
%A 刘健敏
%A 苏青峰
%A 史伟民
%A 夏义本
%J 物理学报
%D 2006
%I 
%X The influences of the applied bias voltage and the pre-irradiation treatment by alpha particles on the electrical properties of sandwich structural diamond film detectors under 5.5 MeV ~ 241 Am alpha-particle irradiation were investigated. Results of current- voltage(I-V) and pulse height distribution measurements showed that the dark current of the diamond film detector would increase due to the pre-irradiation by alpha particles. Under the alpha irradiation, the detector under negative bias voltage had a higher response current and a better signal-to-noise ratio than that under a positive bias. Raman scattering studies directly demonstrated that the above phenomenon resulted mainly from the different structural imperfection distributions along the thickness direction. An energy resolution of about 25.0% was obtained for the detector under a negative bias voltage and 38.4% under a positive bias voltage. With increasing alpha-particle irradiation time, both the response current and the charge collection efficiency increased obviously.
%K diamond films
%K radiation detectors
%K electrical properties
%K pulse height distribution<br>金刚石薄膜
%K 辐射探测器
%K 电学性能
%K 脉冲高度分布
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=320689362A22A681&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=94C357A881DFC066&sid=4D7D2903CFD5410A&eid=4D9E90A42113A4D5&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=19