Calculating rezonanses of atom or molecules with known potentials by way of phase-amplitude method

In this study, we have utilized phase-amplitude method to calculate boundary and rezonance states of atoms or molecules for one dimentional potentials. This method, which is based on Milne method, is used to find all resonance energies and widths. The accuracy of this method is only limited with the accuracy of the numerical method used for the calculation. The code developed for this purpose (in Fortran programming language) yields calculated results as accurate as other accurate numerical softwares and yet is easier to use. But the Fortran code developed by Le Roy doesn't yield correct results when the molecule has high reduced-mass.