LASER SPECTROSCOPY OF GADOLINIUM MONOFLUORIDE - LIGAND-FIELD ASSIGNMENTS OF STATES IN THE 0-3 EV RANGE

Citation
La. Kaledin et al., LASER SPECTROSCOPY OF GADOLINIUM MONOFLUORIDE - LIGAND-FIELD ASSIGNMENTS OF STATES IN THE 0-3 EV RANGE, Journal of molecular spectroscopy, 176(1), 1996, pp. 148-161
Citations number
39
Categorie Soggetti
Spectroscopy,"Physics, Atomic, Molecular & Chemical
ISSN journal
00222852
Volume
176
Issue
1
Year of publication
1996
Pages
148 - 161
Database
ISI
SICI code
0022-2852(1996)176:1<148:LSOGM->2.0.ZU;2-R
Abstract
The techniques of selectively-detected fluorescence excitation and dis persed fluorescence spectroscopy have been used to characterize the (0 ,2) band of the [18.3](8) Sigma(-)-X(8) Sigma(-) transition and the (1 ,0), (0,0), and (0,1) bands of the [15.8](8) Sigma(-)-X(8) Sigma(-) tr ansition of (GdF)-Gd-156. The effective spin-spin and spin-rotation co nstants (in cm(-1)) for the ground X(8) Sigma(-) state (v '' = 2) are lambda '' = -0.181 38, gamma '' = 9.79 x 10(-4) and for the [18.3](8) Sigma(-) state (v' = 0) are lambda' = -3.279, gamma' = -9.47 x 10(-3), which are consistent with 4f(7)[S-8](6)s(2) and 4f(7)[S-8]5d6s config urational assignments, respectively. Five (0,0) bands of an extensive Delta Lambda = +1 system in the near infrared region were analyzed and assigned as a i(4f(7)[S-8]5d(2)[F-3])-a(10)Delta(4f(7)[S-8]5d6s) tran sition. Five (0,0) subbands of a Delta Lambda = 0 transition in the vi sible region were analyzed and assigned as a a(4f(7)[S-8]5d(2)[F-3])-a (10)Delta(4f(7)[S-8]5d6s) transition. Using a semiempirical ligand fie ld model, all observed states were assigned to one of the three lowest energy superconfigurations of GdF: 4f(7)6s(2), 4f(7)5d6s, and 4f(7)5d (2). (C) 1996 Academic Press, Inc.