publication . Article . Preprint . 2020

Direct measurement of the intrinsic electric dipole moment in pear-shaped thorium-228

M. Scheck; M. Bowry; P. Spagnoletti; J. F. Smith; B. S. Nara Singh; M. M. R. Chishti; M. M. R. Chishti; G. Battaglia; Dino A. Jaroszynski; D. O'Donnell;
Open Access
  • Published: 18 May 2020 Journal: Nature Physics, volume 16, pages 853-856 (issn: 1745-2473, eissn: 1745-2481, Copyright policy)
  • Publisher: Springer Science and Business Media LLC
Abstract
It is now well established that atomic nuclei composed of certain combinations of protons and neutrons can adopt reflection-asymmetric, or octupole-deformed, shapes at low excitation energy. These nuclei show promise in the search for a permanent atomic electric dipole moment, the existence of which has implications for physics beyond the Standard Model. Theoretical studies have suggested that certain isotopes of thorium may have the largest octupole deformation. However, due to experimental challenges, the extent of the octupole collectivity in the low-energy states in these thorium nuclei has not yet been demonstrated. This paper reports measurements of the li...
Subjects
arXiv: Physics::Atomic PhysicsNuclear Theory
free text keywords: General Physics and Astronomy, Nuclear Experiment, QC, Dipole, Excitation, Physics beyond the Standard Model, Atomic physics, Proton, Atomic nucleus, Neutron, Physics, Isotopes of thorium, Electric dipole moment
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