Energy Levels of Pu3+ in Lanthanum Trichloride

Abstract

Polarized absorbtion spectra and some Zeeman effect measurements in the region of 20 000–32 000 cm−1 are reported for Pu3+ in LaCl3. A total of 25 J levels was fitted with an rms deviation of 100 cm−1 with the parameters values E0=14 930.5, E1=3726.7, E2=14.99, E3=350.18, ξ=2260.2, α=36.5, β=−1171. The large values of α and β indicate that configuration-interaction effects cannot be neglected in an analysis of the spectra of the higher actinides.