A1 Journal article (refereed)
Nuclear Charge Radius of 26mAl and Its Implication for Vud in the Quark Mixing Matrix (2023)

Plattner, P., Wood, E., Al Ayoubi, L., Beliuskina, O., Bissell, M. L., Blaum, K., Campbell, P., Cheal, B., de Groote, R. P., Devlin, C. S., Eronen, T., Filippin, L., Garcia Ruiz, R. F., Ge, Z., Geldhof, S., Gins, W., Godefroid, M., Heylen, H., Hukkanen, M., . . . Yordanov, D. T. (2023). Nuclear Charge Radius of 26mAl and Its Implication for Vud in the Quark Mixing Matrix. Physical Review Letters, 131(22), Article 222502. https://doi.org/10.1103/PhysRevLett.131.222502

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Publication details

All authors or editorsPlattner, P.; Wood, E.; Al Ayoubi, L.; Beliuskina, O.; Bissell, M. L.; Blaum, K.; Campbell, P.; Cheal, B.; de Groote, R. P.; Devlin, C. S.; et al.

Journal or seriesPhysical Review Letters



Publication year2023

Publication date27/11/2023


Issue number22

Article number222502

PublisherAmerican Physical Society (APS)

Publication countryUnited States

Publication languageEnglish


Publication open accessOpenly available

Publication channel open accessPartially open access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/92138


Collinear laser spectroscopy was performed on the isomer of the aluminium isotope 26mAl. The measured isotope shift to 27Al in the 3s23p 2P○3/2→3s24s 2S1/2 atomic transition enabled the first experimental determination of the nuclear charge radius of 26mAl, resulting in Rc=3.130(15)  fm. This differs by 4.5 standard deviations from the extrapolated value used to calculate the isospin-symmetry breaking corrections in the superallowed β decay of 26mAl. Its corrected Ft value, important for the estimation of Vud in the Cabibbo-Kobayashi-Maskawa matrix, is thus shifted by 1 standard deviation to 3071.4(1.0) s.

Keywordsnuclear physics

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Ministry reportingYes

Reporting Year2023

JUFO rating3

Last updated on 2024-03-07 at 01:05