Publication: Ionization energy of Li-6, Li-7 determined by triple-resonance laser spectroscopy.
All || By Area || By Year| Title | Ionization energy of Li-6, Li-7 determined by triple-resonance laser spectroscopy. | Authors/Editors* | B. A. Bushaw, W. Nörtershäuser, G. W. F. Drake, H. J. Kluge |
|---|---|
| Where published* | Phys. Rev. A. |
| How published* | Journal |
| Year* | 2007 |
| Volume | 75 |
| Number | |
| Pages | 052503 (8 pages) |
| Publisher | |
| Keywords | |
| Link | |
| Abstract |
Rydberg level energies for 7Li were measured using triple-resonance laser excitation, followed by drifted field ionization. In addition to the principal n 2P series, weak Stark mixing from residual electric fields allowed observation of n 2S and hydrogenic Stark manifold series at higher n. Limit analyses for the series yield the spectroscopic ionization energy EI(7Li)=43 487.159 40(18) cmâ1. The 6,7Li isotope shift (IS) was measured in selected n 2P Rydberg levels and extrapolation to the series limit yields IS(EI)7,6=18 067.54(21) MHz. Results are compared with recent theoretical calculations: EI values from experiment and theory agree to within 0.0011 cmâ1, with the remaining discrepancy comparable to uncertainty in QED corrections of order alpha4Ry. The difference between experiment and calculated mass-based IS(EI) yields a change in nuclear charge radii between the two isotopes delta<r2>7,6=â0.60(10) fm2. |
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