Impact of Nuclear Deformation and Pairing on the Charge Radii of Palladium Isotopes
Geldhof, S., Kortelainen, M., Beliuskina, O., Campbell, P., Caceres, L., Cañete, L., Cheal, B., Chrysalidis, K., Devlin, C. S., de Groote, R. P., de Roubin, A., Eronen, T., Ge, Z., Gins, W., Koszorus, A., Kujanpää, S., Nesterenko, D., Ortiz-Cortes, A., Pohjalainen, I., . . . Sommer, F. (2022). Impact of Nuclear Deformation and Pairing on the Charge Radii of Palladium Isotopes. Physical Review Letters, 128(15), Article 152501. https://doi.org/10.1103/PhysRevLett.128.152501
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Physical Review LettersDate
2022Copyright
© 2022 American Physical Society
The impact of nuclear deformation can been seen in the systematics of nuclear charge radii, with radii generally expanding with increasing deformation. In this Letter, we present a detailed analysis of the precise relationship between nuclear quadrupole deformation and the nuclear size. Our approach combines the first measurements of the changes in the mean-square charge radii of well-deformed palladium isotopes between A=98 and A=118 with nuclear density functional calculations using Fayans functionals, specifically Fy(std) and Fy(Δr,HFB), and the UNEDF2 functional. The changes in mean-square charge radii are extracted from collinear laser spectroscopy measurements on the 4d95s 3D3→4d95p3P2 atomic transition. The analysis of the Fayans functional calculations reveals a clear link between a good reproduction of the charge radii for the neutron-rich Pd isotopes and the overestimated odd-even staggering: Both aspects can be attributed to the strength of the pairing correlations in the p
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We acknowledge the CSC-IT Center for Science Ltd., Finland, for the allocation of computational resources. This work has received funding from the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 654002 (ENSAR2) and from the UK Science and Technology Facilities Council. We acknowledge W. Nörtershäuser for the use of the charge-exchange cell.License
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