No coin nor oath required. For personal study only.
On sheets just following the level schemes the compilers list the "most probable" spin and parity assignments for as many levels as possible and indicate the strongest reasons known at the time for each assignment.
Strong arguments are based on the existence, never the absence, of transitions which follow established selection rules. Weak arguments depend sometimes on the absence of transitions, sometimes on analogy, regional trends, or nuclear models. The resulting spins and parities in parentheses are included because the tentative assignments seem helpful when a regional study is being made.
Although the level schemes presented are those believed by the compilers to be the " b e s t " at the time of preparation of the Sheet, they are not always self-consistent. Adopted values of energies and intensities based on weighted averages of experimental data may not always lead to perfect energy and intensity balances.
However, it has seemed better to exhibit the inconsistencies, whether large or small, than to force the data into a consistentlooking pattern which may cover up some real difficulties. These inconsistencies, the most glaring of which are mentioned in the comments, should point the way to fruitful new experiments.
Mass Differences
๐ SIMILAR VOLUMES
## Uncertainties (Errors) and Averages 0.297 25 means 0.297 โข 6.9 10 means 6.9 โข When sufficient data are present, a weighted average is given. If e i is the uncertainty in the value of E i, and W = 1/Eel-2, then โข is given, where E = WS"E, x ei -2 and e is the larger of W !/2 and [W~et-2(E | -l~