In-Trap Spectroscopy of Charge-Bred Radioactive Ions

A. Lennarz, A. Grossheim, K. G. Leach, M. Alanssari, T. Brunner, A. Chaudhuri, U. Chowdhury, J. R. Crespo López-Urrutia, A. T. Gallant, M. Holl, A. A. Kwiatkowski, J. Lassen, T. D. Macdonald, B. E. Schultz, S. Seeraji, M. C. Simon, C. Andreoiu, J. Dilling, and D. Frekers
Phys. Rev. Lett. 113, 082502 – Published 21 August 2014

Abstract

In this Letter, we introduce the concept of in-trap nuclear decay spectroscopy of highly charged radioactive ions and describe its successful application as a novel spectroscopic tool. This is demonstrated by a measurement of the decay properties of radioactive mass A=124 ions (here, In124 and Cs124) in the electron-beam ion trap of the TITAN facility at TRIUMF. By subjecting the trapped ions to an intense electron beam, the ions are charge bred to high charge states (i.e., equivalent to the removal of N-shell electrons), and an increase of storage times to the level of minutes without significant ion losses is achieved. The present technique opens the venue for precision spectroscopy of low branching ratios and is being developed in the context of measuring electron-capture branching ratios needed for determining the nuclear ground-state properties of the intermediate odd-odd nuclei in double-beta (ββ) decay.

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  • Received 4 April 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.082502

© 2014 American Physical Society

Authors & Affiliations

A. Lennarz1,2, A. Grossheim2,3, K. G. Leach2,3, M. Alanssari1, T. Brunner2,†, A. Chaudhuri2, U. Chowdhury2,4, J. R. Crespo López-Urrutia5, A. T. Gallant2,6, M. Holl1, A. A. Kwiatkowski2, J. Lassen2, T. D. Macdonald2,6, B. E. Schultz2, S. Seeraji3, M. C. Simon2, C. Andreoiu3, J. Dilling2,6, and D. Frekers1,*

  • 1Institut für Kernphysik, Westfälische Wilhelms-Universität, 48149 Münster, Germany
  • 2TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
  • 3Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
  • 4Department of Physics, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
  • 5Max Planck Institute for Nuclear Physics, 69117 Heidelberg, Germany
  • 6Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada

  • *Corresponding author. Frekers@uni-muenster.de
  • Present address: Department of Physics, Stanford University, Stanford, CA 94305, USA.

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Vol. 113, Iss. 8 — 22 August 2014

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