发射光子的放射性核素各向同性点源的剂量学常数表 1 )Dosimetric constant table of isotropic point source of radionuclides emitting photons母　　　　　　体核素半衰期衰变方式放　射　性　子　体核素半衰期产　　额空气比释动能率常数(a Gy· m2 )照射量率常数[(a C/kg Dose of photon radionuclides isotropic source point of the dose of Table 1) Dosimetric constant table of isotropic point source of radionuclides emitting photons The half-life of the radionuclide decay mode radionuclide radionuclide half-life yield of air kerma rate constant ( a Gy · m2) Exposure rate constant [(a C / kg