An experimental determination of the dipole moments of the X(1Σ) and A(1Π) states of the BH molecule

1969 ◽  
Vol 47 (11) ◽  
pp. 1155-1158 ◽  
Author(s):  
Ritchie Thomson ◽  
F. W. Dalby
Keyword(s):  
Emission Spectrum ◽  
Experimental Determination ◽  
Electric Fields ◽  
Discharge Tube ◽  
Dipole Moments ◽  
Optical Emission ◽  
Optical Emission Spectrum ◽  
Stark Effects ◽  
High Electric Fields

The optical emission spectrum of the BH radical produced in a discharge tube designed to give high electric fields shows Stark effects. From these, the dipole moments of the X(1Σ+) and A(1Π) states are determined to be (1.27 ± 0.21) D and (0.58 ± 0.04) D, respectively.

Experimental determination of the dipole moments of the X(2Σ+) and B(2Σ+) states of the CN molecule

1968 ◽  
Vol 46 (24) ◽  
pp. 2815-2819 ◽  
Author(s):  
Ritchie Thomson ◽  
F. W. Dalby
Keyword(s):  
Emission Spectrum ◽  
Experimental Determination ◽  
Electric Fields ◽  
Dipole Moments ◽  
High Electric Fields

From observation of the electronic emission spectrum in high electric fields, the dipole moments of the X(2Σ+) and B(2Σ+) states of the CN molecule have been determined to be 1.45 ± 0.08 and 1.15 ± 0.08 debye, respectively. The relative signs of the dipole moments in these two states are shown to be opposite.

Determination of the reduced electric field in surface dielectric barrier discharge plasmas

2021 ◽  
Vol 103 (3) ◽  
pp. 35-44
Author(s):  
А.А. Mutalip ◽  
◽  
Y.А. Ussenov ◽  
А.K. Akildinova ◽  
М.K. Dosbolayev ◽  
...  
Keyword(s):  
Electric Field ◽  
Emission Spectrum ◽  
Barrier Discharge ◽  
Block Diagram ◽  
Average Energy ◽  
Optical Emission ◽  
Spectral Lines ◽  
Surface Barrier ◽  
Optical Emission Spectrum

In this paper, the experimental determination of the reduced electric field (E/n) in plasma of dielectric coplanar surface barrier discharge (DCSBD) at atmospheric pressure was demonstrated. The plasma characteristics and the experimental setup properties were described, and the optical emission spectrum of the plasma was also measured. The results of optical emission spectroscopy showed the presence of nitrogen molecular bands in the emission spectrum of DCSBD. In particular, the second positive and the first negative systems, as well as low intensity OH and NO lines were identified. The main transport properties of electrons, such as mobility, mean average energy, and diffusion coefficients were calculated using the BOLSIG+ open source software. The dependence of the ratio of intensities of the nitrogen spectral lines on the reduced electric field, the dependence of the E/n on plasma power, and the dependence of the electron energy distribution function (EEDF) on E/n were obtained. An algorithm in the form of a block diagram for determining the reduced electric field by the BOLSIG + program and experimentally measured spectral line intensities are presented. The utilized method is quite simple, accessible and versatile.

Searching for 3D effects in the optical, high spectral resolution emission spectrum of KELT-9b

2021 ◽  
Author(s):  
Lorenzo Pino ◽  
Matteo Brogi ◽  
Jean-Michel Désert ◽  
Emily Rauscher
Keyword(s):  
Emission Spectrum ◽  
Spectral Resolution ◽  
Planet Formation ◽  
Emission Spectra ◽  
Optical Emission ◽  
High Spectral Resolution ◽  
Optical Emission Spectrum ◽  
Hot Jupiters ◽  
Atmospheric Structure ◽  
3D Effects

<p>Ultra-hot Jupiters (UHJs; T<sub>eq</sub> ≥ 2500 K) are the hottest gaseous giants known. They emerged as ideal laboratories to test theories of atmospheric structure and its link to planet formation. Indeed, because of their high temperatures, (1) they likely host atmospheres in chemical equilibrium and (2) clouds do not form in their day-side. Their continuum, which can be measured with space-facilities, can be mostly attributed to H- opacity, an indicator of metallicity. From the ground, the high spectral resolution emission spectra of UHJs contains thousands of lines of refractory (Fe, Ti, TiO, …) and volatile species (OH, CO, …), whose combined atmospheric abundances could track planet formation history in a unique way. In this talk, we take a deeper look to the optical emission spectrum of KELT-9b covering planetary phases 0.25 - 0.75 (i.e. between secondary eclipse and quadrature), and search for the effect of atmospheric dynamics and three-dimensionality of the planet atmosphere on the resolved line profiles, in the context of a consolidated statistical framework. We discuss the suitability of the traditionally adopted 1D models to interprete phase-resolved observations of ultra-hot Jupiters, and the potential of this kind of observations to probe their 3D atmospheric structure and dynamics. Ultimately, understanding which factors affect the line-shape in UHJs will also lead to more accurate and more precise abundance measurements, opening a new window on exoplanet formation and evolution.</p>

Time Evolution of Optical Emission Spectrum of a Hg-HID Lamp Exposed to X-ray

2010 ◽  
Vol 30 (4) ◽  
pp. 449-459 ◽  
Author(s):  
N. A. Harabor ◽  
A. Harabor ◽  
I. Palarie ◽  
I. M. Popescu ◽  
G. Zissis
Keyword(s):  
Emission Spectrum ◽  
Time Evolution ◽  
Optical Emission ◽  
Optical Emission Spectrum ◽  
X Ray

scholarly journals Experimental determination of line energies, line widths and relative transition probabilities of the Gadolinium L x-ray emission spectrum

Metrologia ◽  
2019 ◽  
Vol 56 (6) ◽  
pp. 065007
Author(s):  
Malte Wansleben ◽  
Yves Kayser ◽  
Philipp Hönicke ◽  
Ina Holfelder ◽  
André Wählisch ◽  
...  
Keyword(s):  
Emission Spectrum ◽  
Experimental Determination ◽  
Transition Probabilities ◽  
X Ray ◽  
Relative Transition ◽  
Line Widths
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