Abstract
Recently reported nuclear spins and moments of neutron-rich Zn isotopes measured at ISOLDE-CERN [C. Wraith et al., Phys. Lett. B 771, 385 (2017)] show an uncommon behavior of the isomeric state in . Additional details relating to the measurement and analysis of the hyperfine structure are addressed here to further support its spin-parity assignment and to estimate its half-life. A systematic investigation of this isomer indicates that significant collectivity appears due to proton/neutron excitations across the proton = 28 and neutron = 50 shell gaps. This is confirmed by the good agreement of the observed quadrupole moments with large scale Monte Carlo shell model calculations. In addition, potential energy surface calculations in combination with T plots reveal a triaxial shape for this isomeric state.
- Received 23 March 2018
DOI:https://doi.org/10.1103/PhysRevC.97.044324
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Published by the American Physical Society