Energies of the Electronic Configurations of the Singly, Doubly, and Triply Ionized Lanthanides and Actinides

Electronic Structure of f-Element Systems in the UV and VUV Energy Range

“…They show generally some stuctures. The plot of the lowest transition energy versus the number of f electrons also follows the well-known energy variation calculated by Brewer [4] for inter-configuration transitions occurring in the tripositive lanthanide free ions (Fig. 6).…”

Gas-Phase Oxidation of Cm+ and Cm2+ − Thermodynamics of Neutral and Ionized CmO

“…For each of these M 2+ ions, the lowest-lying reactive state with two non-f valence electrons is f n-2 d 2 , with the promotion energies to these states estimated as >7 eV [42]. In view of these high promotion energies to a prepared divalent bonding state for the M 2+ ions, it is expected that the bonds in M 2+ -O should be much weaker those in M + -O (the lower promotion energies for the M + ions are given in Table 1).…”

Radiative lifetime measurements in TmIIIwith time-resolved laser spectroscopy and comparisons with HFR calculations

“…More precisely, the odd-parity configurations 4f 11 5d 2 , 4f 11 6s 2 and 4f 11 5d6s and the even-parity configurations 4f 11 5d6p and 4f 11 6s6p were investigated. For these configurations, the average energy level values were adjusted to reproduce the energies predicted by Brewer (1971) for the lowest level of each configuration, i.e. 4f 11 5d 2 6 L 11/2 (E = 85 000 ± 9000 cm −1 ), 4f 11 6s 2 4 I 15/2 (E = 115 000 ± 7000 cm −1 ), 4f 11 5d6s 6 K 13/2 (E = 100 000±5000 cm −1 ), 4f 11 5d6p 6 L 11/2 (E = 136 000±7000 cm −1 ) and 4f 11 6s6p 6 I 15/2 (E = 150 000 ± 9000 cm −1 ).…”