The number densities of Ar 3s23p54s levels have been measured by means two methods: a self-absorption method with mirror behind the discharge vessel and an absorption high-frequency electrodeless lamp. Concentrations ranging from 6 × 107–4 109 cm−3 were obtained for levels, depending on argon content (10–100% Ar) in Ar/H2 microwave plasma. populations various sublevels resonant metastable states coincide within experimental errors. It was observed that values measurements both methods are...

Low-pressure capillary discharge lamps in Ar–Hg and Xe–Hg mixtures are studied. The size is 0.5 mm (500 µm) radius. According to the literature, such types of plasma sources classified as microplasmas. studies include spectrally resolved optical measurements, tomographic reconstructions numerical simulations using collisional–radiative model for an plasma. We discuss problems theoretical modelling experimental diagnostics microplasma sources. It shown that conventional model, based on...

The goal of the present work was investigation possibility to use intensity distribution Q-branch lines hydrogen Fulcher-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>α</mml:mi></mml:math> diagonal band (<mml:math...

Abstract This work is devoted to the diagnostics of interaction between hydrogen and argon with surface SiO 2 glass walls. For interaction, special high‐frequency electrodeless light sources were prepared, filled pure 1 Torr or argon‐hydrogen total pressure (Ar/H mixing ratio 9:1). Besides mostly used spherical cylindrical lamps, dumbbell type lamps have also been investigated. The spectroscopic AFM measurements showed that in comparison plasma, plasma causes non‐uniform changes surface....

In this work we estimate gas temperature from OH rotational spectrum at 306.4 nm and C₂Swan band 516.5 in thallium containing lamps during two working regimes: stable generation self-modulation regime. The usage of both molecules allowed us to different zones the discharge. measurement results show that central part discharge has higher for about 400 K than vicinity lamp inner walls. regime showed variations are similar atomic molecular spectral line intensities with period being...

The high-frequency electrodeless light sources (HFELS) are widely used as bright radiators of narrow and intense spectral lines covering the region from VUV to IR. Special HFELS filled with pure helium at pressures 0.2 5 Torr were prepared for diagnostics interaction between filling element wall material (glass). Pollution discharge plasma oxygen admixture was studied by spectroscopy. Atomic force microscopy experiments performed find modification surface nanoscale level. Release walls is...

Abstract Our work is connected with the preparation of different type electrodeless discharge lamps. In this we investigate influence SiO 2 glass wall treatment procedures on inner surface Three were applied: vacuum cleaning, vacuum‐thermal cleaning and training in high frequency discharge. The modification has been investigated by means atomic force microscopy. Substantial changes have observed. (© 2008 WILEY‐VCH Verlag GmbH &amp; Co. KGaA, Weinheim)

Mercury Pollution Exploration in Latvia with High-Sensitivity Zeeman Atomic Absorption Spectrometry This research presents Hg pollution measurements performed sensitive method using AAS analyzer RA-915+ and necessary attachments. Air Riga city water samples from a number of rivers lakes were analyzed for presence low-level concentrations. Ombrotrophic bog peat was to get insight into long-term trends. Environment the sites sampled is relatively clean according results obtained, but there are...

In this paper we show our first results of research for creation a detector benzene vapor and possibly other volatile organic compounds detection in air based on Zeeman atomic absorption technique. First the detailed study spectra with high resolution spectrometer Jobin-Yvon 1000M was done. The were registered spectral range from 200-900 nm. More analysis done 240 – 260 nm to test possibility detect by means emission line 254 mercury.

Female birds whose bodies contain environmental contaminants produce eggs with shells that are likewise contaminated, making bird eggshells appropriate indicators for monitoring toxins. Common include organic mercury compounds, especially methylmercury, which known to bioaccumulate and biomagnify in the food chain. Black storks (Ciconia nigra) predominantly consume fish thus at risk high intake. In this study, we used of black as a proxy reconstruct concentration levels distribution mercury,...

High-frequency electrodeless light sources (HF EDLS) are widely used as bright radiators of narrow and intensive atomic ionic spectral lines, covering the spectrum from VUV to IR. Main characteristics HF EDLS high emitted line intensity, long service life, in general, shapes because low-pressure filling elements. In this work we give a short overview use EDLS, containing Hg, Te, Se, Zn, Pb, As, Sb, Bi, Tl, In, Cd, Sn, Zeeman Atomic absorption devices for assaying natural, drinking, waste...

Nowadays, there is an increasing necessity to determine the concentration of different substances in environment low concentrations, as more and attention paid environmental pollution. This work devoted comparison main characteristics high-frequency electrodeless light sources with fillings for their use high precision atomic absorption analysers.The spectral line intensities profiles were studied special design sources, manufactured at Institute Atomic Physics Spectroscopy, arsenic, mercury...

In the current study we present plasma temperature and surface topography measurement results for dumbbell-form lamps before after additional training at 2.4 GHz frequency.The was determined from OH emission in all three parts of lamp (spherical, capillary cylindrical), exciting discharge 100 MHz field SiO 2 glass measurements were performed with Atomic Force Microscope.The is much smoother when gigahertz had been used, however no significant differences between temperatures could be...