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A novel dual-emitter vacuum Compton detector (D-VCD) with
higher gamma ray detecting efficiency is proposed. The emitters are
made of Ta--Al clad metal. The gamma ray sensitivity is studied by
Monte Carlo simulation using the MCNP code. A comparison
between calculations and results measured by using the 1.25~MeV
gamma ray of Co-60 is also performed. Experimental sensitivities for
two sample D-VCDs with the same materials and structures are
1.92×10^ - 20 and 2.02×10^ -
20~C.cm2/MeV separately, which are consistent with
the simulation result of 1.98×10^ -
20~C.cm2/MeV and are 4 times higher than that of
VCD with a single Fe emitter. According to the simulation results, in
a gamma energy range from 0.5 to 3~MeV, the maximum sensitivity
variance for the D-VCD is less than 15%, and less than 5% in a
range from 1 to 2~MeV in particular. The novel D-VCD is applicable to
the detection of intense pulse gamma rays. 相似文献
2.
设计了一个测量高强度DT聚变脉冲中子产额的活化探测器.该探测器由中子慢化体、天然银片、塑料闪烁体和光电倍增管组成,其输出电流通过一个小电流计来获取.通过分析探测器在直流标定和脉冲测量两种状态下输出电流的变化曲线,求解出了特征参数,进而推导计算出DT聚变脉冲中子源的产额.实践证明,这种测量方法与传统的活化法相比,减少了对... 相似文献
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