A4 Article in conference proceedings
Coulomb excitation of pear-shaped nuclei (2019)

Butler, P., Gaffney, L., Spagnoletti, P., Konki, J., Scheck, M., Smith, J., Abrahams, K., Bowry, M., Cederkäll, J., Chupp, T., de Angelis, G., De Witte, H., Garrett, P., Goldkuhle, A., Henrich, C., Illana, A., Johnston, K., Joss, D., Keatings, J., . . . Zielinska, M. (2019). Coulomb excitation of pear-shaped nuclei. In G. de Angelis, & L. Corradi (Eds.), NSD 2019 : IV International Conference on Nuclear Structure and Dynamics (Article 01007). EDP Sciences. EPJ Web of Conferences, 223. https://doi.org/10.1051/epjconf/201922301007

JYU authors or editors

Publication details

All authors or editors: Butler, Peter; Gaffney, Liam; Spagnoletti, Pietro; Konki, Joonas; Scheck, Marcus; Smith, John; Abrahams, Kenzo; Bowry, Michael; Cederkäll, Joakim; Chupp, Timothy; et al.

Parent publication: NSD 2019 : IV International Conference on Nuclear Structure and Dynamics

Parent publication editors: de Angelis, G.; Corradi, L.

Place and date of conference: Venice, Italy, 13.-17.5.2019

ISBN: 978-2-7598-9084-2

Journal or series: EPJ Web of Conferences

ISSN: 2101-6275

eISSN: 2100-014X

Publication year: 2019

Number in series: 223

Article number: 01007

Publisher: EDP Sciences

Publication country: France

Publication language: English

DOI: https://doi.org/10.1051/epjconf/201922301007

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/66948


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 have observed the low-lying quantum states in 224Rn and 226Rn 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.

Keywords: nuclear physics

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2019

JUFO rating: 1

Last updated on 2023-10-01 at 15:35