Specific Gamma-ray dose Constant for 252Cf Sealed with Produced Fission Fragments

Gamma spectra of the 252Cf source hermetically sealed in stainless steel capsule were measured in order to determine the specific γ-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 γ-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.