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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 TRIUMF’s ISAC facility. This is by far the shortest-lived nuclide, t1/2=8.8  ms, 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.
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