https://doi.org/10.1140/epja/s10050-026-01799-3
Regular Article - Theoretical Physics
Systematic investigation of dipole bands in neutron-rich Ag isotopes
1
School of Science, Harbin Institute of Technology, 264209, Weihai, China
2
Shandong Provincial Key Laboratory of Nuclear Science, Nuclear Energy Technology and Computer Utilization, Weihai Frontier Innovation Institute of Nuclear Technology, School of Nuclear Science, Energy and Power Engineering, Shandong University, 250061, Shandong, China
3
Weihai Research Institute of Industrial Technology of Shandong University, 264209, Weihai, China
a
This email address is being protected from spambots. You need JavaScript enabled to view it.
b
This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
3
December
2025
Accepted:
19
January
2026
Published online:
13
February
2026
Abstract
The negative-parity dipole bands built on the 
configuration in neutron-rich Ag isotopes have been systematically investigated using the self-consistent tilted-axis cranking model within the frame of covariant density functional theory. The calculated energy spectra and the relation between spin and rotational frequency agree well with the available experimental data. The predicted deduced B(M1) strengths decreases with increasing spin, which is consistent with the characteristics of shears mechanism. The calculated deformation parameters show a shape evolution from slightly triaxial to small oblate deformation (near spherical) as the neutron number increases. The geometry of angular momenta further demonstrates that these dipole bands can be interpreted as stapler bands, in which the shears mechanism plays an increasingly important role in the structure of the stapler band in Ag isotopes as the neutron number increases.
Copyright comment Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
Communicated by Chong Qi.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2026
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
