The presence of nucleons with very small binding energies in nuclei far from β-stability line produces the low-lying threshold strength, which is the continuum excitation spectrum starting at the excitation energy equal to the binding energy Bν of the l The presence of nucleons with very small binding energies in nuclei far from β-stability line produces the low-lying threshold strength, which is the continuum excitation spectrum starting at the excitation energy equal to the binding energy Bν of the l