Probabilities of optical transitions in electronic vibration-rotation spectra of diatomic molecules

Kuznetsova, L. A.; Кузьменко, Н.Е.; Kuzyakov, Yu. Ya.; Plastinin, Yu. A.

doi:10.3367/ufnr.0113.197406c.0285

Cited by 28 publications

(9 citation statements)

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“…The computed spectroscopic constants for MgD and CrD are given in Table 2. We adopted oscillators strengths f e = 0.059 (Kuznezova et al 1980) and 0.001 (Pavlenko 1999) for the MgH ( A 2 Π– X 2 Σ + ) and the CrH ( A 6 Σ + – X 6 Σ + ) band system, respectively.…”

Section: Procedures Of Computationsmentioning

confidence: 99%

The electronic bands of CrD, CrH, MgD and MgH: application to the ‘deuterium test’

Pavlenko

Harris

Tennyson

et al. 2008

Monthly Notices of the Royal Astronomical Society

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We compute opacities for the electronic molecular band systems A 6 + -X 6 + of CrH and CrD, and A 2 -X 2 + of MgH and MgD. The opacities are computed by making use of existing spectroscopic constants for MgH and CrH. These constants are adjusted for the different reduced masses of MgD and CrD. Frank-Condon factors are used to provide intensities for the individual vibronic bands. These results are used in the computation of synthetic spectra between T eff = 1800 and 1200 K with an emphasis on the realization of 'deuterium test', first proposed by Bejar et al. to distinguish brown dwarfs from planetary mass objects. We discuss the possible use of CrD and MgD electronic bands for the 'deuterium test'. We find CrD to be the more promising of the two deuterides, potentially, the most useful bands of CrH/CrD are the v = +1 and v = −1 at 0.795 and 0.968 μm.

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Section: Procedures Of Computationsmentioning

confidence: 99%

The electronic bands of CrD, CrH, MgD and MgH: application to the ‘deuterium test’

Pavlenko

Harris

Tennyson

et al. 2008

Monthly Notices of the Royal Astronomical Society

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“…Measured and calculated cross sections for interactions of solar radiation with planetary atmospheric species, such as photoabsorption, photoionization, photodissociation, and related processes, were surveyed by Fox (1991) and Huebner et al (1992). Kuznetsova et al (1974), Kuz'menko et al (1979), and Kuznetsova (1987) reviewed approximately 1,000 original publications dealing with the determination of electronic transition moments for diatomic molecular bands. Their recommended values (with some error estimates) for the normalized dependence of transition …”

Section: Experimental Methodsmentioning

confidence: 99%

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Huebner

Barfield

2014

Astrophysics and Space Science Library

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“…Some parameters of particle for actinometric pairing. Data from database [89] for atoms and from [4,90] for molecules. Symbols in the text * τ u was determined as 1/Σ(A u-i ), where u-i are all possible spontaneous transitions from the state u. are used (Fig.…”

Section: Localization Of Emission Of Heterogeneous Sourcesmentioning

confidence: 99%

Spectral Methods of Control of Impurities, Their Flows and Localization in an Equilibrium Low-Temperature Plasma of Low Pressure

2020

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The state-of-art of studies of processes involving small fractions of particles formed as a result of chemical transformations of the source gas or appearing from the outside as an impurity is discussed. Various high-sensitivity methods for measuring the low concentrations of particles are considered. The main focus is on spectral methods, both classical and laser ones. The main modern fields of the application of non-equilibrium plasma, features, and achievements of the diagnostic tools used in them are highlighted. The emphasis is on spectroscopic studies of plasma purity in the low-temperature near-wall layers of thermonuclear reactors. In this case, the issue of the penetration of water molecules into the plasma chamber from the cooling circuits is of particular importance. In view of the limited accessibility to the reactors, new remote versions of spectral emission methods are being developed that are focused on the diagnostics of the ITER near-wall plasma. A new method of multispectral optical actinometry is discussed, in which intermediate chemically unstable particles can play the role of actinometers. This broadens the range of possibilities for quantitative measurements of concentrations of particles of different kinds, and increases the sensitivity. Effective actinometric pairs were found for the objects under consideration, e.g., hydrogen and deuterium atoms. The schemes are worked out on laboratory facilities, and kinetic models of plasma-chemical processes are developed. Scaling of the results of model experiments makes it possible to predict the measurement of the impurity flows at the level (10–9–10–13) Pa m3 s–1 with the localization of sources determined by the spatial resolution of the optical system.

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Probabilities of optical transitions in electronic vibration-rotation spectra of diatomic molecules

Cited by 28 publications

References 0 publications

The electronic bands of CrD, CrH, MgD and MgH: application to the ‘deuterium test’

The electronic bands of CrD, CrH, MgD and MgH: application to the ‘deuterium test’

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Spectral Methods of Control of Impurities, Their Flows and Localization in an Equilibrium Low-Temperature Plasma of Low Pressure

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