Molecular Constants of the NbN Molecule

Absorption spectrum of NbN has been obtained in the 560–670 nm region by intracavity laser spectroscopy. Vibrational and rotational analyses of ³φ - ³Δ transition has been caried out. Molecular constants for the upper (³φ) and ground (³Δ) states have been determined.     

Spectroscopy of Hafnium Monohalides

The modern intracavity laser method has been applied to study electronic spectra of the hafnium monohalides molecules. Results of new investigation of HfF and HfBr molecules are presented: the bands at 589.3, 590.6, and 593.1 nm observed in intracavity laser spectra of HfF₄ have been assigned to the bands of HfF or ionized HfF; new molecular constants of the HfBr molecule have been obtained. Spectroscopic studies of HfCl and Hfl molecules are discussed, and the most reliable molecular constants of HfCl, HfBr, and Hfl molecules are recommended.     

Electronic spectra and molecular constants of zirconium mononitride

The electronic spectra and structure of zirconium mononitride were considered. The electronic vibrational-rotational spectrum of ZrN was obtained by intracavity laser spectroscopy within the 550–750 nm region. The spectrum was analyzed and the molecular constants of the ground X²Σ and excited A²Π electronic states were calculated. On the basis of the obtained experimental data and critical analysis of all the information on ZrN spectrum studies, the most reliable set of molecular constant values was recommended.     

Probabilities for electronic transitions of molecular systems of high-temperature air components—II. The γ and β systems of NO and the (4+) system of CO

Literature results on absolute and relative probabilities for electronic transitions and on lifetimes of electronically excited states in the γ and β systems of the NO molecule and in the (4+) system of the CO molecule are critically analyzed. The results of previous studies to establish the dependence of the electronic transition strength on the r-centroid for these molecular systems are shown to be inadequate. Using a combined analysis of absolute and relative probabilities, new normalized functions S_e(r_v′v″) are obtained that describe the behaviour of the transition strengths in the spectral ranges occupied by the γ and β systems of NO and by the (4+) system of CO.     

Intracavity Electronic Absorption Spectra of MoO and WO Molecules in the Visible Region

Absorption electronic spectra of MoO and WO molecules have been investigated by a intracavity laser technique in the region 550–800 run. New features have been discovered.

As for MoO molecule the rotational analysis of the four bands have been carried out for the first time. Two of these bands were referred to 0–0 transitions arisen from the new (probable triplet) low-lying electronic state, two other bands were referred to transitions arisen from excited components of X⁵II ground state.

As for WO molecule the rotational analysis of 0–0 and 1–0 bands represented A-X and B-X systems have been carried out for the first time. The new band has been discovered which has been referred to new electronic transition.

Molecular constants of new states of both molecules studied have been evaluated.     

Synthesis of a magnetically active compound in the presence of technical-grade lignosulfonates

The conditions of the synthesis of a magnetically active compound by redox transformation of iron(II) and chromium(VI) ions were determined. Under the synthesis conditions, the chromium compounds are recovered from the solution virtually completely. The use of technical-grade lignosulfonates in the step of the condensation of the magnetically active compound leads to considerable enhancement of the magnetic activity.     

Electron spectra of WO molecule. New electron state <Superscript>3</Superscript>Π

The electron spectrum of the tungsten monooxide molecule is observed in the 550–800 nm region using intracavity laser absorption spectroscopy. The WO molecules are produced in a pulsed electric discharge through the mixture of tungsten hexacarbonyl vapors. The spectrum is recorded using a diffraction spectrometer (resolving power of 240000). The bands in the 16400–15500 cm^–1 region are assigned to the ³Π₀–X³Σ⁺ component of the ³Π₀–X³Σ⁺–³XΣ⁺ electron transition. The rotational analysis of the 0-0 and 1-0 bands is carried out and the rotational constants for the ground X″³Σ and the exited ³Π₀ states are computed: В′ = 0.385738 cm^–1, B″ = 0.415538 cm^–1.