74 research outputs found

    Current state of the parametric analysis of the energy levels of U I and U II

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    Several computational advances have allowed us to assign nearly all levels of U I below 20,000 cm/sup -1/ and many beyond that. Parameter values are reported for the odd configurations f/sup 3/ds/sup 2/ + f/sup 3/d/sup 2/s and the even configurations f/sup 2/d/sup 2/s/sup 2/ + f/sup 3/s/sup 2/p + f/sup 4/s/sup 2/, f/sup 3/dsp and f/sup 4/ds. Several remaining problems are pointed out. Tentative assignments of the lower levels of the previously unidentified f/sup 2/d/sup 3/s and f/sup 3/d/sup 3/ configurations are made. For U II preliminary calculations have been carried out on the even configurations f/sup 2/(ds/sup 2/ + d/sup 2/s), f/sup 4/s and f/sup 4/d
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