New Potential Function for Alkali Halide Molecules

A new potential‐energy function has been suggested for the alkali halide molecules, $${\mathrm{U=(-e}}^2\mathrm{/r)+P}\exp {\mathrm{(-kr}}^2\mathrm{),}$$ where P and k are constants. Values of α_e, ω_eχ_e, and the ionic binding energy D_i have been derived for the following three functions: (1) simple Born‐Mayer potential, (2) Rittner potential, and (3) the above suggested potential. The results obtained with the new function are much better than those obtained with the Born‐Mayer potential, but slightly inferior to those obtained with the Rittner potential.