Abstract

The signature inversion in quasiparticle energy and B(M1) is studied by means of the cranking model with fixed mean-field parameters. A qualitative explanation of the signature inversion in quasiparticle energy is given as the lowest-order response of rotating nuclei to a static triaxial field. The anomaly region, that is, the frequency region in which the signature inversion occurs in quasiparticle energy whereas the signature dependence of B(M1) is normal, is shown to exist systematically due to a specific phase relation between the single-particle matrix elements of quadrupole and angular-momentum operators at λ ≳ ε 3 2 .

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