【摘要】 本文介绍了自制的BP型中子、γ射线混合场吸收剂量探测器系统。对该探测器的基本性能进行了研究。给出了球形、指形外推形电离室的主要特性。对于15MeV中子场和⁶⁰Coγ射线场所有修正因子都接近于1。示出了微剂量测量用的正比计数管的主要参数以及在中子、γ混合场中线能y谱的测量结果。描述了由圆盘形TE电离室和GMγ射线剂量计组成的监测系统并给出此监测系统的稳定性。在电信号处理系统中使用了VFC变换器。还谈到了在中子、γ混合场中测量y分布所得各段谱的联结技术.更多还原

【Abstract】 The model BP detector system for absorbed dose measurement in mixed neutron-gamma field has been constructed in our laboratory. The basic performences of the detectors have been studied. The Principal characteristics of the spherical, thimble and extrapolation ionization chambers have been given. The correction factors are all close to 1 for 15 MeV neutron field and ⁶⁰Co gamma-ray field. The basic parameters of the proportional counter for microdosimetry and measurement results of linear energy y spectra in mixed neutron-gamma field are shown. The monitoring system consisting of a dise-shaped TE ionization chamber and a Geiger-Muller gamma-ray dosimeter is described. The stability of The monitoriog system is given. A VFC converter is used in the electrical signal treatment system. A method which combines overlapping spectra obtained in measuring the y distribution of the mixed neutron-gamma field is dealt with.更多还原