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

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.