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##

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 3^{0}3^{1} or 3^{1}3^{2},
for example,
the odd neutrons or protons, respectively, occupy orbitals
[202]5/2(*r*=). 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 3^{2}3^{3} and 3^{3}3^{4}, the signature-split [211]1/2(*r*=)
orbitals
are occupied, and this gives similarly
signature-split pairs of bands (diamonds and triangles). The
same pattern is repeated for the 3^{0}3^{3} and 3^{1}3^{4} pairs
of bands in Fig. 6(d). [Incidentally, not always both
signature partners can be followed up to the same spin; for
example, the 3^{0}3^{1}_{-} band continues to a higher spin than its
partner band 3^{0}3^{1}_{+}, because for the former band,
the deformation significantly changes at high rotational frequencies, see
Fig. 8(b).]

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** Up:** Superdeformed bands in S
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*Jacek Dobaczewski*

*1999-07-27*