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Combined high-resolution laser spectroscopy and nuclear decay spectroscopy for the study of the low-lying states in Fr206, At202, and Bi198

K. M. Lynch, T. E. Cocolios, J. Billowes, M. L. Bissell, I. Budinčević, T. Day Goodacre, R. P. de Groote, G. J. Farooq-Smith, V. N. Fedosseev, K. T. Flanagan, S. Franchoo, R. F. Garcia Ruiz, H. Heylen, R. Li, B. A. Marsh, G. Neyens, R. E. Rossel, S. Rothe, H. H. Stroke, K. D. A. Wendt, S. G. Wilkins, and X. Yang
Phys. Rev. C 93, 014319 – Published 27 January 2016

Abstract

High-resolution laser spectroscopy was performed on Fr206 with the collinear resonance ionization spectroscopy (CRIS) experiment at CERN-ISOLDE. The hyperfine structure and isotope shift of the ground, first isomeric and second isomeric states were measured. The hyperfine components were unambiguously assigned to each nuclear state by means of laser-assisted nuclear decay spectroscopy. The branching ratios in the α decay of Fr206 and At202 were also measured for the first time with isomerically purified beams. The extracted hindrance factors allow determination of the spin of the ground, first isomeric, and second isomeric states in At202 and Bi198.

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  • Received 25 November 2015

DOI:https://doi.org/10.1103/PhysRevC.93.014319

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

K. M. Lynch1,2,*, T. E. Cocolios2,3, J. Billowes3, M. L. Bissell2,3, I. Budinčević2, T. Day Goodacre3,4, R. P. de Groote2, G. J. Farooq-Smith2,3, V. N. Fedosseev4, K. T. Flanagan3, S. Franchoo5, R. F. Garcia Ruiz2, H. Heylen2, R. Li5, B. A. Marsh4, G. Neyens2, R. E. Rossel4,6, S. Rothe4, H. H. Stroke7, K. D. A. Wendt6, S. G. Wilkins3, and X. Yang2

  • 1ISOLDE, PH Department, CERN, CH-1211 Geneva 23, Switzerland
  • 2KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
  • 3School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom
  • 4EN Department, CERN, CH-1211 Geneva 23, Switzerland
  • 5Institut de Physique Nucléaire d'Orsay, F-91406 Orsay, France
  • 6Institut für Physik, Johannes Gutenberg-Universität Mainz, D-55128 Mainz, Germany
  • 7Department of Physics, New York University, New York, New York 10003, USA

  • *kara.marie.lynch@cern.ch

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Vol. 93, Iss. 1 — January 2016

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