Nuclear charge radii of 8,9Li determined by laser spectroscopy |
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Authors: | Ewald G Nörtershäuser W Dax A Götte S Kirchner R Kluge H-J Kühl Th Sanchez R Wojtaszek A Bushaw B A Drake G W F Yan Z-C Zimmermann C |
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Institution: | Gesellschaft für Schwerionenforschung, 64291 Darmstadt, Germany. |
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Abstract: | The 2s-->3s transition of (6,7,8,9)Li was studied by high-resolution laser spectroscopy using two-photon Doppler-free excitation and resonance-ionization detection. Hyperfine structure splittings and isotope shifts were determined with precision at the 100 kHz level. Combined with recent theoretical work, the changes in the nuclear-charge radii of (8,9)Li were determined. These are now the lightest short-lived isotopes for which the charge radii have been measured. It is found that the charge radii monotonically decrease with increasing neutron number from 6Li to 9Li. |
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