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1 核子密度仪的工作原理1.1 核子密度仪的机理及数据处理核子密度仪内部装有两种放射源铯137γ源用来测密度,镅2411铍中子源用来测量水分,中子源安在机壳底部位置不变,γ源装在辐射金属杆内底部,随着测量深度而变。测量密度时,铯137辐射源发出的γ射线进入被测材料,微处理器把检测管接收的数值除以存储在仪器内的密度标准计算值得到计数比,再把计数比送入密度计算程度,可以算出被测材料的密度。测量水分时,中子源放射的中子流进
1 nuclear densitometer works 1.1 nuclear densitometer mechanism and data processing nuclear densitometer equipped with two kinds of radioactive sources inside the cesium 137γ source used to measure density, 镅 2411 beryllium neutron source used to measure the water, the neutron source in the The position of the bottom of the housing is unchanged, and the γ source is installed in the bottom of the radiation metal rod, which changes with the depth of measurement. When measuring the density, the γ-ray emitted by the cesium 137 radiation source enters the material under test. The microprocessor divides the value received by the detecting tube by the standard value of the density stored in the instrument to obtain the counting ratio, and then sends the counting ratio to the density calculation level , You can calculate the density of the measured material. When measuring moisture, the neutron emitted by the neutron source flows in