학술논문
Coulomb excitation of pear-shaped nuclei.
Document Type
Article
Author
de Angelis, G.; Corradi, L.; Butler, Peter; Gaffney, Liam; Spagnoletti, Pietro; Konki, Joonas; Scheck, Marcus; Smith, John; Abrahams, Kenzo; Bowry, Michael; Cederkäll, Joakim; Chupp, Timothy; de Angelis, Giacomo; De Witte, Hilde; Garrett, Paul; Goldkuhle, Alina; Henrich, Corinna; Illana, Andres; Johnston, Karl; Joss, David
Source
Subject
*DIPOLE moments
*PARTICLE physics
*RADIOACTIVE nuclear beams
*QUANTUM states
*GROUND state (Quantum mechanics)
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Language
ISSN
2101-6275
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 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. [ABSTRACT FROM AUTHOR]