Rotational analysis of the B-X₂, B-X₁and A-X₁systems of gaseous PbF

Experimental and Theoretical Study of the Electronic States and Spectra of TeH and TeLi

“…In most branches, the lines can be followed to the origin and thus can be easily assigned. In a first pass, the bands were analyzed as transitions between different = 1/2 and = 3/2 states (Hund's case (c) limit) using the same formalism as in the work of Lumley and Barrow on PbF (27). For the X 2 1/2 and A1/2 states the rotational term values were calculated as…”

High-Resolution Study of theX22Π3/2→X12Π1/2Fine Structure Transitions of PbF and PbCl

“…For comparison of the rotational constants with literature data derived from analyses of the A 2 ⌺ ϩ 3 X 1 , X 2 , and B 2 ⌺ ϩ 3 X 1 , X 2 systems of PbF (10) and PbCl (11,12) the bands were also analyzed as transitions between two different states [Hund's case (c) limit] using the same formalism as in the work of Lumley and Barrow (10). For the X 1 2 ⌸ 1/2 state the rotational term values were calculated by…”

Spectroscopic constants of the known electronic states of lead monofluoride

“…Later, higher resolution emission studies conducted by Lumley and Barrow [4], modern laser induced fluorescence studies by Chen and Dagdigian [5] and Shestakov et al [6], and Fourier transform studies by Ziebarth et al [7] refined knowledge of this heavy, relativistic molecule. These studies were complemented by theoretical studies of Balasubramanian [8] and Das [9] which investigated the large ground-state spin-orbit coupling.…”

“…In this work, we take advantage of this new-found selectivity to determine new spectroscopic constants describing these states. By combining these constants with those of previous workers [3,4,7], we form an improved picture of connections between the known electronic states of PbF. Section 2 provides a brief description of the experimental apparatus used to record spectra.…”

“…The three possible branches, P ff , Q ef , and R ff , of the subsequent excitation through the intermediate state are clearly formed. Because the constants of both the X 1 and A states are already well known [7,4], the assignment of J for each transition is unambiguous. This greatly simplifies interpretation of the data.…”