1. High Resolution Laser Spectroscopy of Iridium Monofluoride
A.G. Adam, L.E. Downie, and A.D. Granger
Department of Chemistry and the Centre for Laser, Atomic, and Molecular Sciences, University of New Brunswick, Fredericton, NB, E3B 6E2
D. Forthomme and D.W. Tokaryk
Department of Physics and the Centre for Laser, Atomic, and Molecular Sciences, University of New Brunswick, Fredericton, NB, E3B 5A3

2. Previous Work on Iridium Diatomics
IrO: Scullman et al., Ber. Bunsenges. Phys. Chem 82, 92(1978).
IrC: Cheung et al., Chem. Phys. Lett. 385, 259(2004), Steimle et al., J. Chem. Phys. 104, 8183(1996)
IrN: Bernath et al., J. Mol. Spectrosc. 193, 363(1999), J. Mol. Spectrosc. 197, 133(1999), Steimle et al., J. Chem. Phys. 106, 2073(199), J .Chem. Phys. 104, 8183(1996)
There are some theoretical calculations for IrH and IrC by Balasubramanian et al. and for IrN by Bernath et al.

3. Apparatus A C B PMT Gas Mixture 1% SF6 in He(g) held at 40psi
Pulsed Valve Driver
Gas Mixture
1% SF6 in He(g)
held at 40psi A C
Delay Generator B
Monochromator
Ablation Laser
PMT
Pump Laser
Dye Laser
Current Amplifier
To vacuum pumps
Timing Scheme
(repetition rate of 10Hz):
A = T0
B = T s
C = T s
Boxcar Integrator
A/D Converter
Computer
Oscilloscope

4. Ir with 1% SF6 reactant gas mixture
Low Resolution Survey
Two electronic systems of IrF found
In the red system ( nm), rovibronic bands were found and subsequently analyzed
5 rovibronic bands were analyzed in the green system ( nm)
IrF
Ir with 1% SF6 reactant gas mixture
IrF
IrS
IrS
640
642
644
646
648
650
652
654
Wavelength (nm)

5. Dispersed Fluorescence
641.9
632.1
1246.3
620.1
598.2
608.9
2210.4
598.4
579.9
603.3
575.7
Relative Wavenumbers (cm-1)

6. Equilibrium Molecular Constants and Bond Strengths

7. High Resolution
193IrF
191IrF
v'-v'' = 1-0
 = 0

8. Electronic States ' = 2 '' = 2 '' = 3 3i X3i 34 33 32 ' = 3
v'-v'' =
' = 4
'' = 4

9. Spin-Orbit Constant, A 3A' 3A' T4' - T3' = 3A' A' = - 82.9480(4) cm-1
' = 2
3A'
3i
' = 3
3A'
' = 4
T4' =
(5) cm-1
T3' =
(5) cm-1
T4' - T3' = 3A'
A' = (4) cm-1
'' = 2
X3i
'' = 3
'' = 4

10. Case (a) - Case (c) Fit

11. Global Case (c) Fit

12. Future Work Sort out the apparent hyperfine structure
The 3-0 band of the red system is perturbed and there are extra lines
Next targets for comparison are IrH and IrCl

13. Acknowledgements Funding Questions?
Joyce MacGregor, Dr. Colan Linton, and Dr. Tim Steimle
Funding
Questions?