O Appelblad

The Spectrum of CuO: Low Lying Electronic States Observed by Laser Induced Fluorescence

The spectrum of gas phase CuO in the red and near infra-red wavelength region is studied by the laser induced fluorescence technique. Three new low lying electronic states, αΣ, γ2Πi and δ2 Σ, with the approximate T0 values αΣ 15 424 cm-1 γ2Π1/2 15 470 cm-1 γ2Π3/2 15 166 cm-1 δ2 Σ 12 986 cm-1 are reported. The multiplicity of the αΣ is uncertain. It is tentatively considered to be a quartet. The vibrational constants of the δ2 Σ state are ωe ~ 661 cm-1 and ωexe ~ 5.7 cm-1. Earlier results on the spectrum of CuO are reviewed. Intensity anomalies, originating from interference between groups of states, are discussed.

The spectra of 74Ge16O and 74Ge18O in the vacuum ultraviolet region

Five band systems of the absorption spectra of the two isotopic molecules 74Ge16O and 74Ge18O in the vacuum ultraviolet region have been rotationally and vibrationally analyzed. A number of perturbations have been observed and from one of these, rotational constants for the perturbing state have been derived. Molecular constants of the upper states are given.

The Spectrum of CuO: Rotational Analysis of Some Green Bands

Two band systems of the emission spectrum of CuO in the green region have been rotationally analyzed, nameley the C 2Πi-X 2Πi and D 2Δi-X 2Πi systems. Molecular constants of the states are given.

Fourier transform spectroscopy of SrH: The A-X and B-X band systems

The absorption spectrum of SrH in the region 6800-7600 A has been investigated by Fourier transform spectroscopy. A new calculation of the ground state molecular constants and a deperturbation of the A2Π/B2Σ+ interaction has been performed. Molecular constants of the deperturbed states are given.

Fourier Transform Spectroscopy of the B2Σ-X2Σ Transition of BaH

The B2Σ-X2Σ band system of gaseous barium hydride in the wave length region 8900-11200 A has been examined in absorption using a King furnace. The spectrum has been obtained by means of Fourier transform spectroscopy. Seven bands have been rotationally analyzed. Term values and molecular constants of the B2Σ and X2Σ states have been determined by standard least-squares analysis. The following molecular constants have been derived (cm-1): Te ωe ωexe ωeye Be αe 104 × De B2Σ+ 11092.593 1088.898 15.471 0.0237 3.26879 0.07061 1.1585 X2Σ+ 0. 1168.433 14.611 0.0276 3.38226 0.06568 1.1234

The far infrared transmission of crystal quartz at 3 K

Abstract We present transmission measurements of Z-cut crystal quartz at 3 K in the wavenumber range 60–180 cm −1 . The results show that the absorption is extremely small and in fact on the average a factor of ten smaller than indicated by earlier measurements discussed in the literature. One consequence of our results is that crystal quartz is useful in the FIR as a substrate material for Fabry-Perot meshes used in cryogenic experiments.

The Spectrum of CuO: Rotational Analysis of a 4Σ1/2 - 2Π1/2 Transition

Two bands at 4432 A and 4558 A, recognized as the 0-0 and 0-1 transitions of a 4Σ1/2-2Π1/2 system in the emission spectrum of CuO, have been rotationally analyzed. The transition is designated k 4Σ1/2-X 2Π1/2. Molecular constants of the upper state are given.

Rotational Analysis of the A-X Band System of SrD

The absorption spectrum of SrD in the region 7200-8000 A has been photographed at high resolution. The rotational analysis of seven bands of the A2Π-X2Σ+ system has been carried out. Effective rotational constants of the A state are given, as well as equilibrium vibrational and rotational constants of both the A and X states.

The Spectrum of CuO: Rotational Analysis of a Band at 4182 Å

A band of the emission spectrum of CuO located at 4182 A is rotationally analyzed. It is the 0-0 band of the M2Π3/2-X2Π3/2 system. Some perturbations are studied. Molecular constants of the upper state are given.

On the E1Σ+ - X1Σ+ System of SnO in the Ultraviolet Region

The absorption spectra of the isotopic molecules 120Sn16O and 120Sn18O have been examined in the region 2400-2900 A, where a number of bands belonging to the E1Σ+-X1Σ+ system have been observed. The vibrational numbering was determined from the isotopic shifts and a rotational analysis of the E-X system of the 120Sn16O molecule was carried out. The following molecular constants for the E state have been derived (in cm-1): Te = 36 297.55 Be = 0.211 02 ωe = 505.01 αe = 1.856 X 10-3 ωeχe = 2.70 De = 0.323 X 10-6