Table of nuclear root mean square charge radii
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Nuclear root-mean-square (rms) charge radii have been compiled, selected and evaluated using two different procedures: a refined and a simple one. Running them on the same database, the results for weighted average radii are very close to each other: 91% of the differences are within " 1⁄2 of the combined error. This confirms our earlier conclusion that the results are generally more sensitive to the decision which data we include in the averaging procedure, and less sensitive to the way how the selected data are weighted to form an average. The resulting weighted averages – updated in May 1999 – are presented in Appendix IV. All background data and program files together with a complete bibliography are also included in the Appendices. In addition to the data tables, simple radius formulae are also given with updated parameters. These formulae may be useful to estimate unmeasured radii (“intelligent interpolation”) or to perform analytic calculations with the functions r(A) and r(Z,A).