Studies of pear-shaped nuclei using accelerated radioactive beams

L.P. Gaffney; P. A. Butler; M. Scheck; A. B. Hayes; F. Wenander; M. Albers; B. Bastin; C. Bauer; A. Blazhev; S. Bönig; N. Bree; J. Cederkäll; T. Chupp; D. Cline; T. E. Cocolios; T. Davinson; H. Dewitte; J. Diriken; T. Grahn; A. Herzan; D. G. Jenkins; D. T. Joss; N. Kesteloot; Th. Kröll; R. Lutter; K. Moschner; P. Napiorkowski; J. Pakarinen; M. Pfeiffer; D. Radeck; P. Reiter; K. Reynders; S. V. Rigby; L. M. Robledo; M. Rudigier; S. Sambi; M. Seidlitz; B. Siebeck; P. Thoele; P. van Duppen; M.J. Vermeulen; M. von Schmid; K. Wrzosek-Lipska; C. Y. Wu; M. Zielinska

doi:10.1038/nature12073

Journal Articles Nature Year : 2013

Studies of pear-shaped nuclei using accelerated radioactive beams

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L.P. Gaffney

Function : Author

P. A. Butler

Function : Author

M. Scheck

Function : Author

A. B. Hayes

Function : Author

F. Wenander

Function : Author

M. Albers

Function : Author

B. Bastin

Function : Author
PersonId : 738704
IdHAL : beyhan-bastin
ORCID : 0000-0001-5959-0875
IdRef : 123532752

Grand Accélérateur National d'Ions Lourds

C. Bauer

Function : Author

A. Blazhev

Function : Author

S. Bönig

Function : Author

N. Bree

Function : Author

J. Cederkäll

Function : Author

T. Chupp

Function : Author

D. Cline

Function : Author

T. E. Cocolios

Function : Author

T. Davinson

Function : Author

H. Dewitte

Function : Author

J. Diriken

Function : Author

T. Grahn

Function : Author

A. Herzan

Function : Author

D. G. Jenkins

Function : Author

D. T. Joss

Function : Author

N. Kesteloot

Function : Author

Th. Kröll

Function : Author

R. Lutter

Function : Author

K. Moschner

Function : Author

P. Napiorkowski

Function : Author

J. Pakarinen

Function : Author

M. Pfeiffer

Function : Author

D. Radeck

Function : Author

P. Reiter

Function : Author

K. Reynders

Function : Author

S. V. Rigby

Function : Author

L. M. Robledo

Function : Author

M. Rudigier

Function : Author

S. Sambi

Function : Author

M. Seidlitz

Function : Author

B. Siebeck

Function : Author

P. Thoele

Function : Author

P. van Duppen

Function : Author

M.J. Vermeulen

Function : Author

M. von Schmid

Function : Author

K. Wrzosek-Lipska

Function : Author

C. Y. Wu

Function : Author

M. Zielinska

Function : Author

Institut de Recherches sur les lois Fondamentales de l'Univers

Abstract

There is strong circumstantial evidence that certain heavy, unstable atomic nuclei are 'octupole deformed', that is, distorted into a pear shape. This contrasts with the more prevalent rugby-ball shape of nuclei with reflectionsymmetric, quadrupole deformations. The elusive octupole deformed nuclei are of importance for nuclear structure theory, and also in searches for physics beyond the standard model; any measurable electric-dipole moment (a signature of the latter) is expected to be amplified in such nuclei. Here we determine electric octupole transition strengths (a direct measure of octupole correlations) for short-lived isotopes of radon and radium. Coulomb excitation experiments were performed using accelerated beams of heavy, radioactive ions. Our data on 220Rn and 224Ra show clear evidence for stronger octupole deformation in the latter. The results enable discrimination between differing theoretical approaches to octupole correlations, and help to constrain suitable candidates for experimental studies of atomic electric-dipole moments that might reveal extensions to the standard model.

Domains

Nuclear Experiment [nucl-ex]

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https://in2p3.hal.science/in2p3-00824119

Submitted on : Tuesday, May 21, 2013-10:32:57 AM

Last modification on : Tuesday, October 15, 2024-10:40:04 AM

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in2p3-00824119 , version 1 (21-05-2013)

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HAL Id : in2p3-00824119 , version 1
DOI : 10.1038/nature12073

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L.P. Gaffney, P. A. Butler, M. Scheck, A. B. Hayes, F. Wenander, et al.. Studies of pear-shaped nuclei using accelerated radioactive beams. Nature, 2013, 497, pp.199-204. ⟨10.1038/nature12073⟩. ⟨in2p3-00824119⟩

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Studies of pear-shaped nuclei using accelerated radioactive beams

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