g-Factors of magnetic–rotational states in ⁸⁵Zr

Abstract

The g-factors of the magnetic–rotational intra-band states in ⁸⁵Zr have been measured by the TMF-IMPAD method for the first time. The configuration $\pi \left(g_{9/2}\right)_8^2 \otimes \nu \left( f_{7/2}\right)$ is established for the band. The measured g-factors are in good agreement with those calculated by the semi-classical model. The decrease of both g-factors and shears angles along the band shows that the total angular momentum is generated by the sheras effect of a step-by-step alignment of the valence protons and neutrons. The rapid neutron alignment leads to a decrease of g-factors along the band. The shears angle of the band-head is great than 90°, which implies that the spin-dependent interaction as well as the residul interaction might be involved in the shears mechanism in ⁸⁵Zr.