Justin E. Albert,*[a]Dmitry Budker
,[b,c,d] and H. R. Sadeghpour
[e]
[a] Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia V8W 3P6, Canada
[b] Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany
[c] Helmholtz-Institut, GSI Helmholtzzentrum für Schwerionenforschung, 55128 Mainz, Germany
[d] Department of Physics, University of California, Berkeley, California 94720, USA
[e] ITAMP, Center for Astrophysics | Harvard & Smithsonian, Cambridge, Massachusetts 02138, USA