First penning-trap mass measurement of the exotic halo nucleus Li11
In this Letter, we report a new mass for Li11 using the trapping experiment TITAN at TRIUMF's ISAC facility. This is by far the shortest-lived nuclide, t1/2=8.8ms, for which a mass measurement has ever been performed with a Penning trap. Combined with our mass measurements of Li8,9 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 Li11. This result is a remarkable confluence of nuclear and atomic physics. © 2008 The American Physical Society.
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Citation
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Related Subject Headings
- General Physics
- 51 Physical sciences
- 49 Mathematical sciences
- 40 Engineering
- 09 Engineering
- 02 Physical Sciences
- 01 Mathematical Sciences