Vibrational relaxation of excimers

Datsyuk, V.V.; Izmaǐlov, I. A.; Kochelap, V.A.

doi:10.3367/ufnr.0168.199804c.0439

Cited by 28 publications

(9 citation statements)

References 84 publications

(21 reference statements)

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“…A drastic intensity increase in the long-wavelength region of the spectrum and a slow decrease in its short-wavelength region (Fig. 3) can be explained by the behavior of potential curves (the excited 2 Σ + 1/2 state turns out shifted with respect to the 2 Σ + 1/2 state toward larger distances between the nuclei) and the relaxation processes in the populations of the upper oscillatory levels of the excited electron state (those processes take a shorter time, than the electron-oscillatory transition into the ground 2 Σ + 1/2 state does [35,36]). The behavior of the dependence of the radiation emission power by HgCl * molecules on the partial pressure of neon and nitrogen (Figs.…”

Section: Plasma Parametersmentioning

confidence: 99%

Mechanism Enhancing the Emission Power of Gas-Discharge Lamps Based on Mixtures of Neon, Nitrogen, and Mercury Dichloride Vapor in the Blue-Green Spectral Interval

Малинина¹,

Шуаибов²,

Малінін³

2019

Ukr. J. Phys.

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A mechanism enhancing the radiation power of a gas-discharge lamp based on a mixture of neon, nitrogen, and a mercury dichloride vapor in the blue-green spectral interval as compared with that for a lamp based on a mixture of only neon and a mercury dichloride vapor has been determined. The optical characteristics and the plasma parameters, as well as the value of the reduced electric field, at which the specific discharge power introduced into the excitation of exciplex molecules of mercury monochloride is maximum, are found. The research results can be used to create a more efficient exciplex lamp that emits radiation bands in the blue-green spectral interval.

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Section: Plasma Parametersmentioning

confidence: 99%

Mechanism Enhancing the Emission Power of Gas-Discharge Lamps Based on Mixtures of Neon, Nitrogen, and Mercury Dichloride Vapor in the Blue-Green Spectral Interval

Малинина¹,

Шуаибов²,

Малінін³

2019

Ukr. J. Phys.

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“…The optimal partial pressure of chlorine was in the range from 40 to 100 Pa. The formation of unified continuum in the spectral range from 200 to 270 nm at a low pressure of the working mixture was defined by the slowing down of the processes of vibrational relaxation within the excited states of chlorine and krypton chloride molecules, which resulted in a significant broadening of the radiation bands being investigated [11]. The reason for the disappearance of the 200 nm band from the spectrum in Fig.…”

Section: Emission Characteristics Of Plasmamentioning

confidence: 99%

Low-pressure ultraviolet emitter utilizing chlorine and krypton chloride molecules

2004

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Results are given of an investigation of the electrical and optical characteristics of the plasma of a longitudinal high-frequency discharge in a krypton/chlorine mixture (P ≤ 1000 Pa). The high-frequency discharge is ignited in a cylindrical quartz tube with an inside diameter of 14 mm and a distance between the anode and cathode of 30 mm. The dynamics of current and radiation of the high-frequency discharge utilizing krypton/chlorine mixtures of different compositions and pressures are investigated. It is found that a longitudinal high-frequency in a krypton/chlorine mixture is a broadband excimer-halogen emitter in the 200-260 nm spectral range. The ultraviolet spectrum of the lamp is formed as a result of overlapping of broadened radiation bands of chlorine and krypton chloride molecules (200 nm , 222 nm KrCl, and 257 nm ). The optimal composition of a Kr/Cl 2 mixture is determined, which is necessary to obtain the maximal power of ultraviolet radiation.

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“…1) is explained by the behavior of the potential curves (the excited B 2 Σ 1 ⁄ 2 + state is shifted toward longer internuclear distances relative to the X 2 Σ 1 ⁄ 2 + state) and by processes of occupancy relaxation of the upper vibrational levels of the excited electronic state, which occur faster than the vibronic transition to the X 2 Σ 1 ⁄ 2 + ground state [25,26]. The behavior of the dependence of the emission power of the HgBr * exciplex on the partial pressure of helium (Fig.…”

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confidence: 98%

“…of the exciplex molecule HgBr in a gas discharge plasma based on a mercury dibromide-helium mixture occurs due to processes leading to formation and decay of the B 2 Σ 1 ⁄ 2 + state of mercury monobromide, of which the primary processes are [23][24][25][26][27][28][29][30][31][32][33]:…”

mentioning

confidence: 99%

Optical characteristics and parameters of a gas discharge plasma based on a mixture of mercury dibromide vapor and helium

2009

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We present the results of studies of the optical characteristics and parameters of a gas discharge plasma produced by a barrier discharge at atmospheric pressure, based on a mixture of mercury dibromide vapor and helium (the working medium of a small (emitting area 8 cm 2 ) exciplex gas discharge emitter). An average emission power of 70 mW (λ max = 502 nm) was achieved for pump pulse repetition frequency 6 kHz, voltage pulse amplitude 2.3 kV, and current pulse amplitude 8 A of duration ~100 nsec. We established the plasma parameters: the electron energy distribution functions, the transport characteristics, the discharge power losses per unit pressure going toward electron processes, the electron concentration and temperature, and also the rate constants for processes of elastic and inelastic scattering of electrons by the components of the working mixture as a function of the parameter E/N, where E is the electric field strength and N is the total concentration of mercury dibromide molecules and helium atoms.

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Vibrational relaxation of excimers

Cited by 28 publications

References 84 publications

Mechanism Enhancing the Emission Power of Gas-Discharge Lamps Based on Mixtures of Neon, Nitrogen, and Mercury Dichloride Vapor in the Blue-Green Spectral Interval

Mechanism Enhancing the Emission Power of Gas-Discharge Lamps Based on Mixtures of Neon, Nitrogen, and Mercury Dichloride Vapor in the Blue-Green Spectral Interval

Low-pressure ultraviolet emitter utilizing chlorine and krypton chloride molecules

Optical characteristics and parameters of a gas discharge plasma based on a mixture of mercury dibromide vapor and helium

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