Signature-splitting

In Figs. 6 and 7, there are several pairs of nearly degenerate bands. First of all, all the p=n+1 and p=n+3 bands shown in Figs. 6(b) and (d), form usual pairs of signature-partner bands differing by signatures of odd nucleons. The signature splitting of these partner-bands closely follows the signature splitting of the corresponding positive-parity single-particle routhians, see Figs. 1 and 2. Indeed, in bands 3⁰3¹ or 3¹3², for example, the odd neutrons or protons, respectively, occupy orbitals [202]5/2(r=$\pm {i}$). These orbitals show almost no signature splitting, and hence almost no signature splitting is also seen in Fig. 6(b) (circles and squares). Similarly, in bands 3²3³ and 3³3⁴, the signature-split [211]1/2(r=$\pm {i}$) orbitals are occupied, and this gives similarly signature-split pairs of bands (diamonds and triangles). The same pattern is repeated for the 3⁰3³ and 3¹3⁴ pairs of bands in Fig. 6(d). [Incidentally, not always both signature partners can be followed up to the same spin; for example, the 3⁰3¹_- band continues to a higher spin than its partner band 3⁰3¹₊, because for the former band, the deformation significantly changes at high rotational frequencies, see Fig. 8(b).]