Kanellakopoulos, A, Yang, XF, Bissell, ML, Reitsma, ML, Bai, SW, Billowes, J, Blaum, K, Borschevsky, A, Cheal, B 
ORCID: 0000-0002-1490-6263, Devlin, CS ORCID: 0000-0002-8034-0085 et al (show 17 more authors)
(2020)
Nuclear moments of germanium isotopes near <i>N</i>=40.
PHYSICAL REVIEW C, 102 (5).
054331-.
Abstract
Collinear laser spectroscopy measurements were performed on $^{69,71,73}$Ge isotopes ($Z = 32$) at ISOLDE-CERN. The hyperfine structure of the $4s^2 4p^2 \, ^3P_1 \rightarrow 4s^2 4p 5s \, ^3P_1^o$ transition of the germanium atom was probed with laser light of 269 nm, produced by combining the frequency-mixing and frequency-doubling techniques. The hyperfine fields for both atomic levels were calculated using state-of-the-art atomic relativistic Fock-space coupled-cluster calculations. A new $^{73}$Ge quadrupole moment was determined from these calculations and previously measured precision hyperfine parameters, yielding $Q_{\rm s}$ = $-$0.198(4) b, in excellent agreement with the literature value from molecular calculations. The moments of $^{69}$Ge have been revised: $\mu$ = +0.920(5) $\mu_{N}$ and $Q_{\rm s}$= +0.114(8) b, and those of $^{71}$Ge have been confirmed. The experimental moments around $N = 40$ are interpreted with large-scale shell-model calculations using the JUN45 interaction, revealing rather mixed wave function configurations, although their $g$-factors are lying close to the effective single-particle values. Through a comparison with neighboring isotones, the structural change from the single-particle nature of nickel to deformation in germanium is further investigated around $N = 40$.
| Item Type: | Article |
|---|---|
| Additional Information: | accepted in Phys. Rev. C., in production |
| Uncontrolled Keywords: | nucl-ex, nucl-ex, nucl-th |
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 07 Sep 2021 15:27 |
| Last Modified: | 14 Mar 2024 19:37 |
| DOI: | 10.1103/PhysRevC.102.054331 |
| Open Access URL: | https://journals.aps.org/prc/abstract/10.1103/Phys... |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3136253 |
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