Specific gamma-ray dose constant for~(252) Cf sealed with produced fission fragments

摘要

Gamma spectra of the ~(252)Cf source hermetically sealed in stainless steel capsule were measured in order to determine the specific y-ray dose constant (SGRDC). The measurements were performed two times - four months after the source was purchased and after period equal to two half-lives. It is obtained that after two half-lives the SGRDC is more than two times larger due to accumulation of the y-ray emitting fission products. The changes of activity for long-living fission products identified in the measured spectra were used to estimate their relative contributions to the increase of the total SGRDC.