  Different techniques of the X-ray Diffraction Line Profile Analysis (XRDLPA)
have been used to assess the microstructure of the irradiated
Zr-1.0%Nb-1.0%Sn-0.1%Fe alloy. The domain size, microstrain, density of
dislocation and the stacking fault probabilities of the irradiated alloy have
been estimated as a function of dose by the Williamson-Hall Technique, Modified
Rietveld Analysis and the Double Voigt Method. A clear signature in the
increase in the density of dislocation with the dose of irradiated was
revealed. The analysis also estimated the average density of dislocation in the
major slip planes after irradiation. For the first time, we have established
the changes in the electron density distribution due to irradiation by X-ray
diffraction technique. We could estimate the average displacement of the atoms
and the lattice strain caused due to irradiation from the changes in the
electron density distribution as observed in the contour plots.
