Charge-state distribution of Li ions from the β decay of laser-trapped He6 atoms

R. Hong, A. Leredde, Y. Bagdasarova, X. Fléchard, A. García, A. Knecht, P. Müller, O. Naviliat-Cuncic, J. Pedersen, E. Smith, M. Sternberg, D. W. Storm, H. E. Swanson, F. Wauters, and D. Zumwalt
Phys. Rev. A 96, 053411 – Published 13 November 2017

Abstract

The accurate determination of atomic final states following nuclear β decay plays an important role in several experiments. In particular, the charge state distributions of ions following nuclear β decay are important for determinations of the βν angular correlation with improved precision. Beyond the hydrogenic cases, the decay of neutral He6 presents the simplest case. Our measurement aims at providing benchmarks to test theoretical calculations. The kinematics of Lin+ ions produced following the β decay of He6 within an electric field were measured using He6 atoms in the metastable (1s2s,S13) and (1s2p,P23) states confined by a magneto-optical trap. The electron shakeoff probabilities were deduced, including their dependence on ion energy. We find significant discrepancies on the fractions of Li ions in the different charge states with respect to a recent calculation.

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  • Received 22 March 2017

DOI:https://doi.org/10.1103/PhysRevA.96.053411

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear PhysicsAtomic, Molecular & Optical

Authors & Affiliations

R. Hong1,2,*, A. Leredde2, Y. Bagdasarova1, X. Fléchard3, A. García1, A. Knecht1,†, P. Müller2, O. Naviliat-Cuncic4, J. Pedersen1, E. Smith1, M. Sternberg1,‡, D. W. Storm1, H. E. Swanson1, F. Wauters1,§, and D. Zumwalt1,‡

  • 1Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
  • 2Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 3Normandie University, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France
  • 4National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA

  • *Corresponding author: hongran@uw.edu
  • Present address: Paul Scherrer Institute, Villigen PSI, 5232, Switzerland.
  • Present address: Porch, 2200 1st Ave South Seattle, WA 98134, USA.
  • §Present address: Institut für Kernphysik, Johann-Joachim-Becherweg 45, Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany.

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Issue

Vol. 96, Iss. 5 — November 2017

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