Abstract
The expression for the isotope shift obtained in a previous paper by considering the nucleus as a sphere in which the charge distribution has the trapezoidal shape is refined and then used to calculate the isotope shift constants for isotopio pairs for which experimental results are available. The isotope shift constants due to nuclear deformation have also been computed taking the deformations from the measured
B (E2) transition probabilities. The calculated and experimental results of the isotope shifts of various elements are found to be in agreement within experimental uncertainties. On this evidence, the deformations of a number of nuclei have been deduced from the isotope shift data.