AI Article Synopsis
- Atomic nuclei can take on a pear shape through octupole distortion, which is significant for studying electric-dipole moments and potential CP violation—an area of interest for physics beyond the Standard Model.
- Researchers identified radon and radium isotopes as key candidates for these measurements.
- Observations of radon isotopes revealed that while they exhibit octupole vibrations, they do not have a static pear shape in their ground states, making them less suitable for enhancing measurable atomic electric-dipole moments.
Article Abstract
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 and Rn 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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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6554308 | PMC |
| http://dx.doi.org/10.1038/s41467-019-10494-5 | DOI Listing |
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