Publication: First Penning-Trap Mass Measurement of the Exotic Halo Nucleus Li-11

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Title	First Penning-Trap Mass Measurement of the Exotic Halo Nucleus Li-11
Authors/Editors*	M. Smith, M. Brodeur, T. Brunner, S. Ettenauer, A Lapierre, R. Ringle, V. L. Ryjkov, F. Ames, P. Bricault, G. W. F. Drake, P. Delheij, D. Lunney, F. Sarazin, and J. Dilling
Where published*	Physical Rfeview Letters
How published*	Journal
Year*	2008
Volume	101
Number	20
Pages	202501 (4 pages)
Publisher	American Physical Society
Keywords	HIGH-PRECISION; ION; ELECTRON; ISOTOPES
Link	http://prl.aps.org.ezproxy.uwindsor.ca/abstract/PRL/v101/i20/e202501
Abstract	n this Letter, we report a new mass for 11Li using the trapping experiment TITAN at TRIUMFâs ISAC facility. This is by far the shortest-lived nuclide, t1/2=8.8ââms, for which a mass measurement has ever been performed with a Penning trap. Combined with our mass measurements of 8,9Li we derive a new two-neutron separation energy of 369.15(65) keV: a factor of 7 more precise than the best previous value. This new value is a critical ingredient for the determination of the halo charge radius from isotope-shift measurements. We also report results from state-of-the-art atomic-physics calculations using the new mass and extract a new charge radius for 11Li. This result is a remarkable confluence of nuclear and atomic physics.