Laser Spectroscopy of Gadolinium Monofluoride: Ligand Field Assignments of States in the 0–3 eV Range

✍ Scribed by Leonid A. Kaledin; Jonathan C. Bloch; Michael C. McCarthy; E.A. Shenyavskaya; Robert W. Field

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 555 KB
• Volume: 176
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1996.0072

✦ Synopsis

The techniques of selectively-detected fluorescence excitation and dispersed fluorescence spectroscopy have been used to characterize the (0,2) band of the [18.3] 8 S 0 -X 8 S 0 transition and the (1,0), (0,0), and (0,1) bands of the [15.8] 8 S 0 -X 8 S 0 transition of 156 GdF. The effective spin-spin and spin-rotation constants (in cm 01 ) for the ground X 8 S 0 state (£Љ Å 2) are lЉ Å 00.181 38, gЉ Å 9.79 1 10 04 and for the [18.3] 8 S 0 state (£ Å 0) are l Å 03.279, g Å 09.47 1 10 03 , which are consistent with 4f 7 [ 8 S]6s 2 and 4f 7 [ 8 S]5d6s configurational assignments, respectively. Five (0,0) bands of an extensive DL Å /1 system in the near infrared region were analyzed and assigned as a 10 F(4f 7 [ 8 S]5d 2 [ 3 F])-a 10 D(4f 7 [ 8 S]5d6s) transition. Five (0,0) subbands of a DL Å 0 transition in the visible region were analyzed and assigned as a 10 D(4f 7 [ 8 S]5d 2 [ 3 F])a 10 D(4f 7 [ 8 S]5d6s) transition. Using a semiempirical ligand field 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 .