Monte Carlo calculations of free-air ionization chamber correction factors for electron loss and photon scatter at INER

The Monte Carlo method was used to evaluate two self-made cylindrical free-air ionization chambers correction factors for electron loss and scattered photons, corresponding to the medium- and low-energy x-ray ranges. For the medium-energy chamber, the calculated results were in close agreement with current values of the National Radiation Standard Laboratory. For the low-energy chamber, the results showed that the electron loss and scattered photons using measured BIPM spectra were extremely close to those obtained using simple x-ray unit geometry calculated spectra. (author)