论文部分内容阅读
本装置是放射计量领域中测量αβ面源的2π发射率的标准装置,它由箱式探头和国产NIM插件总成为整机。该探头是由铅室内的零屏栅多丝正比计数器和单一反符合多丝正比计数器组成。其特点是:低本底(α≤0.006C·P·M/cm~2、β≤0.03C·P·M/cm~2)、低工作电压、低噪声、高探测效率(>99%)、大灵敏区(150×100mm)、小死时间,有微小的偶然反符合、良好的高压计算坪特性和甄别特性。装置达到了量值范围宽(50C·P·M～10~6C·P·M),高精度(50C·P·M～200C·P·M±5%～±6%、200C·P·M～10~6C·M·M≤±0.6%)标准装置的要求。同时,解决了同类装置在测面导电性差的源上所遇到的不稳定难题。
This device is a standard device for measuring 2π emissivity of αβ surface source in the field of radiometric measurement. It consists of a box probe and a domestic NIM plug-in. The probe is composed of a lead-free multi-wire proportional counter and a single anti-multi-wire proportional counter within the lead chamber. Its characteristics are: low background (α≤0.006C · P · M / cm ~ 2, β≤0.03C · P · M · cm -2), low working voltage, low noise and high detection efficiency , Large sensitive area (150 × 100mm), small dead time, a slight accidental coincidence, a good high-pressure calculation Ping characteristics and screening characteristics. The device achieves a wide range of values (50C · P · M ~ 10 ~ 6C · P · M), high precision (50C · P · M ~ 200C · P · M ± 5% ± 6%, 200C · P · M ~ 10 ~ 6C · M · M≤ ± 0.6%) Standard equipment requirements. At the same time, the same device to solve the problem of poor conductivity on the surface of the encountered problems encountered instability.