The effect of fast neutron fluencies and gamma-rays on the DC conductivity, In(sigma), for pure gelatin and that doped with 5, 10, and 15 wt% of CoCl2 center dot 6H(2)O, and 5 wt% of NiCl2 center dot 6H(2)O, MnCl2 center dot H2O and AgNO3 has been respectively investigated at different temperatures. Fast neutron fluencies and gamma-rays doses are set from 7.60 x 10(5) to 0.50 x 10(9) N/cm(2), and 0.25 up to 1.50 Gy, respectively. The calculated values of activation energies (E-a) are found to be dependent on the radiation doses. The conductivity of gelatin samples shows an interesting behavior, which depends on the dopant Co concentration and the exposure dose. DC conductivity of the investigated samples reveals that the ionic conduction has been established at higher temperatures and fast neutron fluencies and gamma-rays doses, while the electronic one plays an important role at lower temperatures. This has been related to the crosslinking formations as a result of the interaction between the exposure dose and gelatin sample. The attained results suggest strongly the applicability of these materials in dosimetry. (C) 2007 Elsevier B.V. All rights reserved.