Evaluation procedure for nuclear RMS charge radii

Data sources are listed and an evaluation procedure is described that have been used recently to derive the best values of nuclear root-mean-square (RMS) charge radii measured by fast electron scattering and muonic atom X-rays. The evaluation procedure consists of two algorithms. The first one performs a search for discrepant data “outliers” together with an eventual reassignment of their errors; this algorithm is active only for groups containing at leastn=5 data. The second algorithm forms a weighted mean and its error for each data group; it takes into account both external and internal consistencies. An illustrative Table of input data as well as a Table of “1990 best values” of nuclear RMS charge radii are also included.