A new method of calculating nuclear energy gap Δ

Based on the traditional Three-Parameter formula for extracting energy gap Δ, an improved method has been obtained through fitting the data and eliminating the impact of the isospin effect on the binding energy. We find with our new calculations that the fewer the particle number, the greater the impact of isospin, and therefore, the greater the deviation caused in the traditional method. On the other hand, the results obtained by the present method, either for nuclei in the light mass or in heavy mass region, are much closer to the results of the empirical pairing formula. (authors)