基于数值分析法的多点源核料位计放射源强度分布计算及测量的非线性修正

The Radioactive Source Distribution Calculation and Gauging Nonlinear Correction of Multi-point Source Nuclear Gauge Based on the Numeric Analysis Method

摘要: 为了实现核料位计的线性刻度，采取多点源单探测器的核子料位计方案，提出三种能够实现核料位计近似线性刻度的多点源强度分布的计算方法。用⁶⁰Co源对建立的理论模型进行计算，绘制出计数率料位曲线，并通过Excel和Matlab软件进行了数值计算和残差分析，修正了测量的非线性，实现理论设计上的近似线性输出。

Abstract: In order to realize the linear output of the nuclear gauge, the multi-point source and single detector scheme was used, proposing three methods for calculating the distribution of multi-point source activity. Calculations were did respectively based on the design scheme, and the material level-cps graphs were drew out by using ⁶⁰Co source. The numeric calculation and residual analysis was completed to correcte the gauging nonlinearity and realize the oretical linear output.