Intensity distributions in R and P branches of (0–0) band of the A1Π→X1Σ+ electronic transition of the BH molecule and determination of gas temperature in non-equilibrium plasmas

Osiac, M.; Lavrov, B. P.; Röpcke, J.

doi:10.1016/s0022-4073(01)00268-0

Cited by 41 publications

(64 citation statements)

References 23 publications

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“…Most of the theoretical work on this system has been devoted to the low-lying electronic states, the interpretation of the A 1 Å À X 1 AE þ spectrum and the predissociation of the A 1 Å state. Similarly the spectroscopy of this system has been extensively studied, since 1931 [15-25 and references therein], with most of the recent work again having been devoted to the A 1 Å À X 1 AE þ spectrum [18][19][20][21]25] and to the triplet spectrum, b 3 AE À À a 3 Å [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Multireference configuration interaction and quantum defect calculations on the Rydberg states of the BH molecule

Petsalakis

Theodorakopoulos

2006

Molecular Physics

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Configuration interaction calculations have been carried out on electronic states of BH and BH þ . The calculated spectroscopic constants are in good agreement with experimental data, where available. Quantum defect functions have been calculated from the ab initio potential energy curves of 4sÁ) and 4f( 3 Á) Rydberg states of BH, which may be used to generate all the Rydberg states of each series up to the ionization limit. Calculated vibrational autoionization widths for the Rydberg states are smaller than 0.5 cm À1 .

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Section: Introductionmentioning

confidence: 99%

Multireference configuration interaction and quantum defect calculations on the Rydberg states of the BH molecule

Petsalakis

Theodorakopoulos

2006

Molecular Physics

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“…Among the other diagonal (ν 0 = ν") bands of the Fulcher-α system the [ν 0 = ν" = 2] branch has been recommended as the most suitable for determination of the rotational and gas temperatures [21].…”

Section: Resultsmentioning

confidence: 99%

“…Recently, the rotational, vibrational and translational temperatures of hydrogen molecules in HCGD [20] were determined using relative line intensities belonging to Fulcher-α diagonal band (d 3 Π u → a 3 Σ + g electronic transition; P-, Q-and R-branches; ν 0 = ν" = 0). However, the use of line intensities within the Q-branch of the [ν 0 = ν" = 2] band in d 3 Π u → a 3 Σ + g electronic transition has been proposed for temperature measurement in hydrogen low pressure gas discharges [21]. The goal of the present work was to check the possibility of using the Q-branches of not only the [ν 0 = ν" = 2] band, but also the [ν 0 = ν" = 3] band of Fulcher-α system in spectroscopic diagnostics of deuterium HCGD.…”

Section: Introductionmentioning

confidence: 99%

Rotational and gas temperatures of molecular deuterium in a hollow cathode glow discharge

Majstorović¹,

Šišović²

2015

Journal of Research in Physics

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We report the results of optical emission spectroscopy measurements of rotational T rot and translational (gas) temperature of deuterium molecules. The light source was a low-voltage high-pressure hollow cathode (HC) glow discharge with titanium cathode operated in deuterium. The rotational temperature of excited electronic states of D 2 was determined from the intensity distribution in the rotational structure of Q-branches of the two Fulcher-α diagonal bands: [ν 0 = ν" = 2] and [ν 0 = ν" = 3]. The population of the excited energy levels, determined from relative line intensities, was used to derive the radial distributions of the temperature of the excited and the ground state of the deuterium molecule.

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“…The principal methyl removal process was again assumed to be the self recombination of the radicals. The line strength of the Q (8,8) transition was measured as (3.2 ± 1.0) × 10 −19 cm molecule −1 at room temperature, which corresponds to a band strength of (2.5 ± 0.8) × 10 −17 cm molecule −1 . This converts to a transition dipole moment of µ 2 = 0.315 ± 0.05 Debye.…”

Section: Overview Of the Knowledge Of The µ 2 Dipole Moment Of The Mementioning

confidence: 99%

On the Reaction Kinetics of Chemically Active Molecular Microwave Plasmas

Stancu

Pipa

Lombardi

et al. 2005

Contrib. Plasma Phys.

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Key words Microwave plasmas, reaction kinetics, degree of dissociation, hydrogen, methyl radical, quantum cascade laser, boron monoxide. PACS 52. 20, 52.25, 52.75, 52.80 Recent studies of phenomena in molecular non-equilibrium microwave plasmas, which have been performed within the framework of the DFG-Sonderforschungsbereich 198, project A12, are presented in this review article. Special attention is devoted to the properties and kinetics of transient molecular species. The experimental methods used were optical emission and absorption spectroscopy. The main objectives of this contribution were threefold: (i) the determination of the degree of dissociation of hydrogen in plasmas, (ii) the quantitative detection of the methyl radical, and (iii) plasma process monitoring using quantum cascade lasers.

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Intensity distributions in R and P branches of (0–0) band of the A1Π→X1Σ+ electronic transition of the BH molecule and determination of gas temperature in non-equilibrium plasmas

Cited by 41 publications

References 23 publications

Multireference configuration interaction and quantum defect calculations on the Rydberg states of the BH molecule

Multireference configuration interaction and quantum defect calculations on the Rydberg states of the BH molecule

Rotational and gas temperatures of molecular deuterium in a hollow cathode glow discharge

On the Reaction Kinetics of Chemically Active Molecular Microwave Plasmas

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