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First results from the CRIS experiment

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Abstract

The ability to study rare isotopes with techniques such as mass spectrometry and laser spectroscopy is often prevented by low production rates and large isobaric contamination. This has necessitated the development of novel beam cleaning techniques that can efficiently isolate the isotope of interest. The Collinear Resonance Ionization Spectroscopy (CRIS) experiment at ISOLDE, achieves this by resonantly ionizing a bunched atom beam in a region of ultra high vacuum. This method is motivated by the need to measure the hyperfine structure and isotope shift at the extremes of isospin where typical production rates drop to 1 atom/s. The technique also offers the ability to purify an ion beam and even select long-lived isomeric states (> 1 ms) from the ground state, which can be subsequently studied by decay spectroscopy or mass spectrometry experiments. This paper will report on the successful commissioning of the CRIS beam line and the recent laser spectroscopy results and laser assisted nuclear decay spectroscopy on the neutron deficient francium isotopes.

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Authors and Affiliations

  1. School of Physics and Astronomy, The University of Manchester, Manchester, M13 9PL, UK

    K. T. Flanagan, J. Billowes, T. E. Cocolios, K. M. Lynch, T. J. Procter & I. Strashnov

  2. Instituut voor Kern- en Stralingsfysica, KU Leuven, 3001, Leuven, Belgium

    M. L. Bissell, I. Budinčević, R. P. de Groote, S. De Schepper, R. F. Garcia Ruiz, H. Heylen & G. Neyens

  3. Engineering Department, CERN, 1211, Geneva 23, Switzerland

    V. N. Fedosseev, B. A. Marsh, R. E. Rossel & S. Rothe

  4. Institut de Physique Nucléaire d’Orsay, 91406, Orsay, France

    S. Franchoo

  5. Department of Physics, New York University, New York, NY, 10003, USA

    H. H. Stroke

  6. Institut für Physik, Johannes Gutenberg-Universität Mainz, 55128, Mainz, Germany

    K. D. A. Wendt

Authors
  1. K. T. Flanagan
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  2. J. Billowes
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  3. M. L. Bissell
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  4. I. Budinčević
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  5. T. E. Cocolios
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  7. S. De Schepper
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  11. H. Heylen
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  12. K. M. Lynch
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  13. B. A. Marsh
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  17. S. Rothe
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  18. I. Strashnov
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  19. H. H. Stroke
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  20. K. D. A. Wendt
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Corresponding author

Correspondence to K. T. Flanagan.

Additional information

Proceedings of the 9th International Workshop on Application of Lasers and Storage Devices in Atomic Nuclei Research “Recent Achievements and Future Prospects” (LASER 2013) held in Poznan, Poland, 13–16 May, 2013.

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Flanagan, K.T., Billowes, J., Bissell, M.L. et al. First results from the CRIS experiment. Hyperfine Interact 227, 131–137 (2014). https://doi.org/10.1007/s10751-013-0988-1

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