Fig. 1 shows in the first place the precision with which the atomic mass of the main isotopes of each element was known in 19611. It should be repeated here that these errors were mainly determined by mass spectroscopic measurements; (measurements of reaction energies, decay energies, or microwave mass ratios mainly determine mass differences of nuclides with nearby mass numbers) and also that it was found necessary to multiply by 2.65 the errors assigned to mass doublets on the basis of the spread in several measurements of a single doublet before they were acceptable in a general least squares adjustment.
KeywordsAtomic Mass Mass Difference Reaction Energy Decay Energy Nuclear Phys
Unable to display preview. Download preview PDF.