Simple Nuclear Structure in $^{111--129}\mathrm{Cd}$ from Atomic Isomer Shifts

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Simple Nuclear Structure in ${}^{111 - 129}{Cd}$ from Atomic Isomer Shifts

D. T. Yordanov, D. L. Balabanski, M. L. Bissell, K. Blaum, I. Budinčević, B. Cheal, K. Flanagan, N. Frömmgen, G. Georgiev, Ch. Geppert, M. Hammen, M. Kowalska, K. Kreim, A. Krieger, J. Meng, R. Neugart, G. Neyens, W. Nörtershäuser, M. M. Rajabali, J. Papuga, S. Schmidt, and P. W. Zhao

Phys. Rev. Lett. 116, 032501 – Published 22 January 2016

Abstract

Isomer shifts have been determined in ${}^{111 - 129}{Cd}$ by high-resolution laser spectroscopy at CERN-ISOLDE. The corresponding mean square charge-radii changes, from the $1 / 2^{+}$ and the $3 / 2^{+}$ ground states to the $11 / 2^{-}$ isomers, have been found to follow a distinct parabolic dependence as a function of the atomic mass number. Since the isomers have been previously associated with simplicity due to the linear mass dependence of their quadrupole moments, the regularity of the isomer shifts suggests a higher order of symmetry affecting the ground states in addition. A comprehensive description assuming nuclear deformation is found to accurately reproduce the radii differences in conjunction with the known quadrupole moments. This intuitive interpretation is supported by covariant density functional theory.

Received 13 October 2015

DOI:https://doi.org/10.1103/PhysRevLett.116.032501

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Published by the American Physical Society

Physics Subject Headings (PhySH)

Charge distributions Fine & hyperfine structure

Collective models Nuclear density functional theory

Nuclear Physics

Authors & Affiliations

D. T. Yordanov^1,2,3,*, D. L. Balabanski⁴, M. L. Bissell⁵, K. Blaum², I. Budinčević⁵, B. Cheal⁶, K. Flanagan⁷, N. Frömmgen⁸, G. Georgiev⁹, Ch. Geppert^8,10, M. Hammen⁸, M. Kowalska³, K. Kreim², A. Krieger⁸, J. Meng¹¹, R. Neugart^2,8, G. Neyens⁵, W. Nörtershäuser^8,12, M. M. Rajabali⁵, J. Papuga⁵, S. Schmidt¹⁰, and P. W. Zhao¹³

¹Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay, France
²Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
³CERN European Organization for Nuclear Research, Physics Department, 1211 Geneva 23, Switzerland
⁴ELI-NP, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, 077125 Magurele, Romania
⁵Instituut voor Kern- en Stralingsfysica, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
⁶Oliver Lodge Laboratory, University of Liverpool, Liverpool, L69 7ZE, United Kingdom
⁷School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, United Kingdom
⁸Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany
⁹CSNSM, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay, France
¹⁰GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
¹¹State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
¹²Institut fur Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
¹³Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

^*Yordanov@ipno.in2p3.fr

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Vol. 116, Iss. 3 — 22 January 2016

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Physical Review Letters

Simple Nuclear Structure in Cd111–129 from Atomic Isomer Shifts

D. T. Yordanov, D. L. Balabanski, M. L. Bissell, K. Blaum, I. Budinčević, B. Cheal, K. Flanagan, N. Frömmgen, G. Georgiev, Ch. Geppert, M. Hammen, M. Kowalska, K. Kreim, A. Krieger, J. Meng, R. Neugart, G. Neyens, W. Nörtershäuser, M. M. Rajabali, J. Papuga, S. Schmidt, and P. W. Zhao

Phys. Rev. Lett. 116, 032501 – Published 22 January 2016

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Simple Nuclear Structure in ${}^{111 - 129}{Cd}$ from Atomic Isomer Shifts