Studies on photon buildup for some thermoluminescent dosimetric compounds

Photon buildup for some SrSO₄, BaSO₄, MgSO₄, MnSO₄, FeSO₄ and ZnSO₄ thermoluminescent dosimetric (TLD) compounds was investigated in the present work. Photon energy absorption buildup factors and photon exposure build factors were computed for the TLD compounds using the five-parameter geometric progression fitting method in energy range 0.015-15 MeV for penetration depths up to 40 mean free path. The buildup factors were studied as a function of photon energy, penetration depth and chemical compositions. Effective atomic numbers and air-kerma for the TLD compounds were calculated and ICRU standard tissue equivalence was discussed. (author)