Document Type

Article

Publication Date

2000

Publication Title

Physical Review A - Atomic, Molecular, and Optical Physics

Volume

61

Issue

2

First Page

225041

Last Page

225048

Abstract

The isotope shifts for 2 2PJ-2 2S and 3 2S-2 2S transition energies in lithium are calculated variationally in Hylleraas coordinates, including nonrelativistic, relativistic, and QED terms up to O(μ/M), O(μ/M)2, O(α2 μ/M), and O(α3 μ/M) atomic units, and the lowest-order finite nuclear size correction. With high-precision isotope shift measurements, our results can potentially yield a precise determination of the nuclear charge radius for different isotopes of lithium, and especially for the exotic 11Li "halo" isotope. For the case of 7Li-6Li, using the nuclear charge radii from nuclear scattering data, our calculated isotope shifts for the 2 2P1/2-2 2S, 2 2P3/2-2 2S, and 3 2S-2 2S transitions are 10 534.31(61)(6) MHz, 10 534.70(61)(6) MHz, and 114 54.31(39)(5) MHz, respectively, where the first brackets indicate the uncertainties due to the nuclear charge radii, and the second brackets indicate the computational uncertainties. The experimental isotope shifts are inconsistent with each other and with theory for these transitions.

Comments

copyright American Physical Society http://dx.doi.org/10.1103/PhysRevA.61.022504

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