Mainz 1997 – wissenschaftliches Programm
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MO: Molekülphysik
MO 7: Elektronische Übergänge
MO 7.2: Vortrag
Dienstag, 4. März 1997, 11:15–11:30, P2
The NaHg Blue Bands — •L. Windholz1, D. Gruber1, U. Reiter–Domiaty1, S. Dinev1, B.A. He"s2, and M.M. Gleichmann2 — 1Institut f"ur Experimentalphysik, Technische Universit"at Graz, Petersgasse 16, A–8010 Graz — 2Lehrstuhl f"ur Theoretische Chemie, Universit"at Bonn, Wegelerstra"se 12, D–53115 Bonn
We report the observation of new spectrally isolated NaHg blue bands, produced by a reactive three–body collision involving Na( 4 2 D ) and Na( 5 2 S ) atoms following energy pooling collisions of laser excited Na( 3 2 P ) atoms[1]. Applying this production scheme, no background due to Na2 fluorescence that usually masks the NaHg blue bands was observed in the spectral region of interest.
On the basis of ab initio potential energy curves employing an improved basis set for Na and Hg[2] the emission bands are analyzed by quantum mechanical simulations. An identification of the NaHg bound–bound as well as bound–free bands along with the vibrational parameters of the electronically excited III1/2 and II3/2 states are given for the first time.
[1] D. Gruber, U. Domiaty, K. Iskra, S.Dinev, L. Windholz, J. Phys. Chem 100, 7078 (1996)
[2] D. Gruber, U. Domiaty, X. Li, L. Windholz, M. M. Gleichmann, B. A. He"s, J. Chem. Phys. 102, 5174 (1995) This work was financially supported by the Fonds zur Förderung der Wissenschaftlichen Forschung, project. no. P–9929–PHY.