RUI: High Precison Calculations on Some Three and Four-Electron Atomic Systems

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The goal of the project is to carry out some high precision calculations on three and four electron atoms. The specific objectives are to 1) resolve a disagreement between theory and experiment on the 2s-2p transition in Li, 2) to compute the energy of the Be atom to 1> Hartree or better, 3) to get a precision lower bound on the non-relativistic energy of Li and 4) to determine the specific mass shifts and isotope shifts for several states of Li and Be.