In the case of loss of the source of the radioactive source, the distribution of radiation field needs to be mastered, which is an important basis for radioactive sources search strategy and the evacuation of the radiation area. In this paper, the inversion of the particle field is put forward by a function constructed for solid radioactive sources. we made use of mathematical construction techniques to construct dose function tactfully. An inversion model is established which is based on the dose of nodes in the grid. The dose of the grid lines is restored by the cubic spline interpolation. A...
