To calculation of gamma-sources set for radioisotope stationary level gage

On the basis of the scale linearization method of radioisotopic stationary levelmeter a radiation source unit BIIP-1 is developed for radioisotopic levelmeter-regulator. The article is devoted to the question of mathematical relationships on the basis of which an engineering calculation method concerning the choice of emitters type can be developed, and their position relative to each other defined