ENERGY DEPENDENCE OF PULSE HEIGHT DEFECT IN SILICON PARTICLE DETECTORS

作     者：KRULISCH, AH AXTMANN, RC 

作者机构：Program on Nuclear Studies in Engineering School of Engineering and Applied Science Princeton University Princeton N.J. 08540 U.S.A. 

出 版 物：《NUCLEAR INSTRUMENTS & METHODS》 

年 卷 期：1967年第55卷第2期

页      面：238-+页

核心收录：

基　　金：National Science Foundation, NSF United States Atomic Energy Commission, AEC 

摘      要：The pulse height response of silicon surface barrier detectors was measured for median light and heavy fission fragments at average energies from 7 to 102 MeV. The fragment energies were determined by a time-of-flight technique. Comparison of the detectors response to fission fragments with that to alpha particles yielded Δ, the pulse height defect. The results indicate that an appreciable fraction of Δ is due to recombination losses within the ionization column produced by the fragment. The contribution to Δ from this cause decreases approximately linearly with fragment energy. In the energy realm where nonionizing nuclear collisions occur, Δ decreases sharply at initial energies below 25 MeV. An empirical energy calibration method proposed by Schmitt et al. for fission fragments with undergraded energies gave good agreement with the time-of-flight data in the energy range 25–100 MeV. A further empirical procedure is proposed for energies below 25 MeV.