Emission spectrum of hot HDO in the 380-2190 cm(-1) region

Fourier transform emission spectra were recorded using a mixture of H2O and D2O at a temperature of 1500 degreesC. The spectra were recorded in three overlapping sections and cover the wavenumber range 380-2190 cm(-1). A total of 22106 lines were measured, of which 60% are thought to belong to HDO. A total of 6430 FIDO transition,, are assigned, including the first transitions to the (040) vibrational state, with a term value of 5420.042 cm(-1). A total of 1536 new energy levels of HDO belonging to the (000), (010) (020), (030), and (040) stated are presented, significantly extending the degree of rotational excitation compared to previous studies. (C) 2001 Elsevier Science

Analysis of hot D2O emission using spectroscopically determined potentials

Fourier transform emission spectra of D2O vapor were recorded at a temperature of 1500 °C in the wavenumber range 380–1880 cm–1. 15 346 lines were measured, of which the majority were identified as belonging to D2O. The spectrum was analyzed using variational nuclear motion calculations based on spectroscopically determined potential-energy surfaces. Initial assignments were made using a potential surface obtained by fitting a high accuracy ab initio potential. The new assignments were used to refine the potential surface, resulting in additional assignments. A total of 6400 D2O transitions were assigned and 2144 new D2O energy levels were obtained. Transitions involving the 42 and 52 bending states, with band origins of 4589.30 (±0.02) and 5679.6 (±0.1) cm–1, respectively, were assigned for the first time

Analysis of hot D2O emission using spectroscopically determined potentials

Fourier transform emission spectra of D2O vapor were recorded at a temperature of 1500 °C in the wavenumber range 380–1880 cm–1. 15 346 lines were measured, of which the majority were identified as belonging to D2O. The spectrum was analyzed using variational nuclear motion calculations based on spectroscopically determined potential-energy surfaces. Initial assignments were made using a potential surface obtained by fitting a high accuracy ab initio potential. The new assignments were used to refine the potential surface, resulting in additional assignments. A total of 6400 D2O transitions were assigned and 2144 new D2O energy levels were obtained. Transitions involving the 42 and 52 bending states, with band origins of 4589.30 (±0.02) and 5679.6 (±0.1) cm–1, respectively, were assigned for the first time

THE ELECTRONIC EMISSION SPECTRUM OF CuCl

Author Institution: Department of Chemistry, University of Waterloo; Laboratoire de Photo Physique Moleculaire, Bat. 210, Universit\'{e} de Paris XIThe electronic emission spectrum of CuCl has been observed. The spectrum was observed when CuCl powder and Cu metal were placed in a copper hollow cathode lamp operated with He gas. On the basis of recent ab initio calculations, the labels for the electronic states were revised and the 0-0, 0-1 and 1-0 bands of the $a^{3}\Sigma^{+}_{1} - X^{1}\Sigma^{+}(A^{1}\Pi-X^{1}\Sigma^{+}),b^{3}\Pi-X^{1}\Sigma^{+}(B^{1}\Pi-X^{1} \Sigma^{+}), b^{3}\Pi_{o}-X^{1}\Sigma^{+} (C^{1}\Sigma^{+}-X^{1}\Sigma^{+}), A^{1}\Pi-X^{1}\Sigma^{+} (D^{1}\Pi-X^{1}\Sigma^{+})$ and $B^{1}\Sigma^{+}-X^{1}\Sigma^{+}(E^{1}\Sigma^{-}-X^{1}\Sigma^{+})$ transitions were measured. The old labels are in parentheses. Improved band constants were obtained for the excited and ground states

Fourier transform emission spectroscopy of CuCI

International audienceThe electronic spectra of CuCl were observed in the 18 000 cm−1 to 25 000 cm−1 spectral region using a Bruker IFS 120 HR Fourier transform spectrometer (FTS) and with the FTS associated with the McMath-Pierce Solar Telescope at Kitt Peak. On the basis of ab initio calculations, the labels for the electronic states were revised, and the a3Σ+1–X1Σ+ 0–0 band, the b3Π0–X1Σ+ 0–0, 1–0, and 0–1 bands, the b3Π1–X1Σ+ 0–0, 1–0, and 0–1 bands, the A1Π–X1Σ+ 0–0, 1–0, and 0–2 bands, and the B1Σ+–X1Σ+ 0–0 and 1–0 bands were measured. Improved spectroscopic constants were obtained for the excited and ground states

THE INFRARED EMISSION SPECTRUM OF DCL

Author Institution: Department of Chemistry, University of WaterlooThe vibrational rotational emission spectrum of DCl was recorded with a Fourier transform spectrometer; line positions for the 1-0, 2-1, 3-2 and 4-3 bands of $D^{35}Cl$ and the 1-0, 2-1 and 3-2 bands of $D^{37}Cl$ were measured. The two sets of data were combined with previously measured submillimeter were pure rotational transitions to obtain Dunham constants. A combined isotopomer analysis of data for all four isotopic forms of HCl was also performed combining these new data with analogous literature results for $H^{35}Cl$ and $H^{37}Cl$, to yield Born-Oppenheimer breakdown correction terms for this system. The results of similar analyses of HF and HBr allowed a comparison of Born-Oppenheimer breakdown correction terms for HF, HCl and HBr

FOURIER TRANSFORM ELECTRONIC SPECTROSCOPY OF STRONTIUM HYDRIDE: SrH and SrD

Author Institution: Department of Chemistry, University of WaterlooDuring a search for double minima states of several alkaline earth hydrides, high resolution spectra of the $E^{2}\Pi - X^{2}\Sigma^{+}$ transitions of these species were recorded. The results for SrH and SrD, in the 18500 and 19500 $cm^{-1}$ region, are presented in this paper. A new combined discharge and tube furnace source was used to generate the molecules. Strontium metal was heated in an alumina tube to $650^{\circ}C$ with a slow flow of Ar ($\sim 20$ torr) and $H_{2}/D_{2} (\sim 1 torr)$, and a 3kV/330 mA continuous DC discharge was applied. The spectra were recorded using a Fourier transform spectrometer. The resulting molecular constants for SrH and SrD will be presented and discussed