Actinide anionic bound states

In this chapter we will concentrate on our anion work [2-4], which has identified 114 bound states in the lanthanides and 41 bound states in the actinides, over half of which are new predictions. In two anions, Ce and La , bound opposite parity states were found, making a total of 3 [Os was previously known]. Bound-to-bound transitions have been observed in Ce [5] and may have been observed in La [6]. We have also worked on many properties of lanthanide and actinide atoms and positive ions. A complete list of publications can be found elsewhere [7]. 

Table 1.1 Binding energy (meV) relative to neutral ground state for the lowest state of each lanthanide and actinide anion configuration. The numbers in parentheses are the number of predicted bound states for that configuration...

The 237pu and the 237 nitrate matrix was dissolved with 9 M HC1. Five percent HNO3 was added to the HC1 solution to ensure that the actinides would be retained on an ion exchange column (Dowex A-l) as Pu(IV) and Np(VI). Subsequently, however, addition of iodide ion (as HI or NH4I) reduced the Pu to the III state which was no longer bound by the anion resin and was collected in a receiver as the acid solution passed through the column. 

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