Abstract
The electric quadrupole moment of 49Sc was measured by collinear laser spectroscopy at CERN-ISOLDE to be Qs=−0.159(8) eb, and a nearly tenfold improvement in precision was reached for the electromagnetic moments of 47,49Sc. The single-particle behavior and nucleon-nucleon correlations are investigated with the electromagnetic moments of Z=21 isotopes and N=28 isotones as valence neutrons and protons fill the distinctive 0f7/2 orbit, respectively, located between magic numbers, 20 and 28. The experimental data are interpreted with shell-model calculations using an effective interaction, and ab-initio valence-space in-medium similarity renormalization group calculations based on chiral interactions. These results highlight the sensitivity of nuclear electromagnetic moments to different types of nucleon-nucleon correlations, and establish an important benchmark for further developments of theoretical calculations.
| Original language | English |
|---|---|
| Article number | 137064 |
| Journal | Physics Letters B |
| Volume | 829 |
| DOIs | |
| State | Published - Jun 10 2022 |
| Externally published | Yes |
Funding
We acknowledge the support of the ISOLDE collaboration and technical teams and S. R. Stroberg for the imsrg++ code [64] used to perform VS-IMSRG calculations. This work was supported by the National Key R&D Program of China (Contract No. 2018YFA0404403 ), the National Natural Science Foundation of China (No: 11875073 , 12027809 , U1967201 , 11775316 ); the BriX Research Program No. P7/12 , FWO -Vlaanderen (Belgium), GOA 15/010 from KU Leuven ; the UK Science and Technology Facilities Council grants ST/L005794/1 and ST/P004598/1 ; ERC Consolidator Grant No. 648381 (FNPMLS); the NSF grant PHY-1068217 , the BMBF Contract No. 05P18RDCIA ; the Max-Planck Society, the Helmholtz International Center for FAIR (HIC for FAIR); the EU Horizon 2020 research and innovation programme through ENSAR2 (no. 654002 ), NSERC under grants SAPIN-2018-00027 and RGPAS-2018-522453 and the Arthur B. McDonald Canadian Astroparticle Physics Research Institute . TRIUMF receives funding via a contribution through the National Research Council of Canada and computations of VS-IMSRG were performed with an allocation of computing resources on the Cedar at WestGrid and Compute Canada.
Keywords
- Ab-initio calculation
- Collinear laser spectroscopy
- Electromagnetic moments
- Nucleon-nucleon correlation