Comprehensive study on energy absorption build-up factors and exposure build-up factors of solid state nuclear track detectors

Abstract

The gamma-ray build-up factors of solid state nuclear track detectors (SSNTDs) have been computed for photon energy in the range 0.015-15 MeV up to 40 mfp penetration depth by geometrical progression (GP) method. Significant variations in energy absorption build-up factors (EABFs) and exposure build-up factors (EBFs) for the investigated SSNTDs are observed. The EABFs and EBFs of the SSNTDs are strongly dependent upon the photon energy, penetration depths and the chemical compositions. The build-up factors are small in low and high photon energy whereas very large in medium energy region. The result could be useful in the field of radiation dosimetry of solid state nuclear track detectors for gamma dose measurements.