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Citation: WANG Hua-Sheng, KVARAN Agust. REMPI Spectra of the Hydrogen Halides[J]. Acta Physico-Chimica Sinica, ;2007, 23(10): 1543-1552. doi: 10.3866/PKU.WHXB20071011 shu

REMPI Spectra of the Hydrogen Halides

1.
Science Institute, University of Iceland, 107 Reykjavik, Iceland

Received Date: 8 March 2007
Available Online: 23 August 2007

(2+1) Resonance multiphoton ionization (REMPI) spectra of HX(X=Cl, Br and I) were recorded and analyzed by simulation calculation to derive rotational constants, band origins and isotope shift values for a number of vibrational bands of Ω states. Our data for HCl compared nicely with those derived by Green et al. using conventional analysis methods. Newspectroscopic parameters were derived for 8 vibrational bands which were assigned to the V(¹∑⁺) state, for v'=4 of the E(¹∑⁺) state as well as for 5 new bands in HBr . New spectroscopic parameters were derived for 4 vibrational bands which are assigned to the V state and for v'=1 of the E state in HI. Anomalies in energy level spacings, rotational parameters and isotope shift values were observed as being largely due to homogeneous interactions between the V and the E states. Variations observed in the intensity ratio of O and S line series to Q line series in vibrational bands of the E and V states for HCl and HBr were discussed and mechanisms of two photon excitation processes were proposed.
- REMPI; Hydrogen halides; Laser Spectroscopy; Perturbations; Spectral simulations; Excition mechanisms
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