Journal
NATURE COMMUNICATIONS
Volume 10, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-019-10494-5
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Funding
- ISOLDE Collaboration and technical teams
- Science and Technology Facilities Council (STFC
- UK) [ST/P004598/1, ST/L005808/1]
- Federal Ministry of Education and Research (BMBF
- Germany) [05P18RDCIA, 05P15PKCIA, 05P18PKCIA, 05P2018]
- National Science Centre (Poland) [2015/18/M/ST2/00523]
- European Union [654002]
- Marie Sklodowska-Curie COFUND grant [665779]
- Research Foundation Flanders (FWO, Belgium) [GOA/2015/010]
- Interuniversity Attraction Poles Programme [P7/12]
- RFBR(Russia) [17-52-12015]
- STFC [ST/L005670/1, 2012538, ST/R004056/1, ST/P004598/1] Funding Source: UKRI
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There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in Rn-224 and Rn-226 by accelerating beams of these radioactive nuclei. We show that radon isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.
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