科研之友
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摘要
In this paper we present a timing detector which has low detection threshold and is radiation-resistant. The photons induced by radioactive beam ions passing through a thin plastic-scintillator foil BC422, emit from the foil center corresponding to one focal point of an aluminum ellipsoidal mirror and are reflected to another focus point at which the cathode of a photomultiplier tube locates. A time resolution of about 115 ps can be achieved for (12)N of 58.5 MeV/u and 130 ps for (17)B of 43.7 MeV/u. The counting rate up to 10(8) packets per second (pps) is allowed.
- 出版日期2009-8-20
- 单位中国科学院近代物理研究所; 西南大学
