Laser Spectroscopy of Niobium Fission Fragments: First Use of Optical Pumping in an Ion Beam Cooler Buncher

B. Cheal, K. Baczynska, J. Billowes, P. Campbell, F. C. Charlwood, T. Eronen, D. H. Forest, A. Jokinen, T. Kessler, I. D. Moore, M. Reponen, S. Rothe, M. Rüffer, A. Saastamoinen, G. Tungate, and J. Äystö
Phys. Rev. Lett. 102, 222501 – Published 5 June 2009

Abstract

A new method of optical pumping in an ion beam cooler buncher has been developed to selectively enhance ionic metastable state populations. The technique permits the study of elements previously inaccessible to laser spectroscopy and has been applied here to the study of Nb. Model independent mean-square charge radii and nuclear moments have been studied for Nb90,90m,91,91m,92,93,99,101,103 to cover the region of the N=50 shell closure and N60 sudden onset of deformation. The increase in mean-square charge radius is observed to be less than that for Y, with a substantial degree of β softness observed before and after N=60.

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  • Received 18 January 2009

DOI:https://doi.org/10.1103/PhysRevLett.102.222501

©2009 American Physical Society

Authors & Affiliations

B. Cheal1,*, K. Baczynska2, J. Billowes1, P. Campbell1, F. C. Charlwood1, T. Eronen3, D. H. Forest2, A. Jokinen3, T. Kessler3, I. D. Moore3, M. Reponen3, S. Rothe4, M. Rüffer2, A. Saastamoinen3, G. Tungate2, and J. Äystö3

  • 1Schuster Building, The University of Manchester, Brunswick Street, Manchester, M13 9PL, United Kingdom
  • 2School of Physics and Astronomy, The University of Birmingham, Birmingham, B15 2TT, United Kingdom
  • 3Department of Physics, University of Jyväskylä, PB 35 (YFL) FIN-40014 Jyväskylä, Finland
  • 4Institut für Physik, Johannes Gutenberg Universität Mainz, Staudinger Weg 7, D-55128 Mainz, Germany

  • *bradley.cheal@manchester.ac.uk

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Vol. 102, Iss. 22 — 5 June 2009

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