Pseudo-mirror nuclei with A = 100 and A = 130

A striking similarity in the level structures of pairs of even-even nuclei with Α ≅ 100 and Α ≅ 130 is pointed out. This agrees with Casten's method of classsifying nuclear energy levels as a function of Nπ Nν, where Nπ and Nν are the numbers of valence proton and neutron pairs. It is shown that this is the natural consequence of the underlying basis of the single particle states of a pseudo-SU(3) model, and that pairs of nuclei in these two masss regions with the same Nπ Nν can be seen as 'pseudo-mirror' nuclei. (author)