Study of La^+ Rydberg and autoionization states: ionization potential of La_II

Theoretical analysis of ionic autoionization spectra of lanthanum via an intermediate state [Xe]5d6d1P1

“…2. Comparison of the present calculated eigenchannel spectra related to ionic autoionization Rydberg converging to [Xe]5d (5/2) 2D 5/2 with the experimental spectra [1] of La Second, we discuss the broad peak B located around 90627 cm −1 . Figure 3(b) shows the calculated spectra for eigenchannel 6s 1/2 nf 5/2 J π = 2 − .…”

“…The experimental spectra of La + via the intermediate state [Xe]5d6d 1 P 1 in the energy region 90200-91800 cm −1 . [1] Four ionic autoionization Rydberg series were assigned.…”

“…We have measured the Rydberg and autoionization Rydberg spectra of La + via the intermediate state [Xe]5d6d 1 P 1 or [Xe]5d6d 3 F 2 . [1] The energy levels of La + below the first ionization via the intermediate state [Xe]5d6d 1 P 1 and [Xe]5d6d 3 F 2 , have been calculated in the framework of multi-channel quantum defect theory (MQDT) [4−10] from first principles by relativistic multi-channel theory (RMCT). [11−17] These calculations are consistent with the experimental results, thus experimental peaks are classified and clearly assigned.…”

Energy Levels and the Landé -Factors for Singly Ionized Lanthanum

“…In pure coupling, the Landé -factor can be taken given by formula (8) in [43]. The Landé -factors for energy levels are a valuable aid in the analysis of a spectrum.…”

“…Spector and Gotthelf performed configuration interaction in La II [7]. Xie and coworkers investigated Rydberg and autoionization states of the singly ionized lanthanum [8]. First, ionization potential of lanthanides by laser spectroscopy was studied by Worden et al [9].…”