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- W1997933879 abstract "Intensities and widths of atomic spectral lines of He, H, and Fe, excited in an atmospheric-pressure helium inductively coupled plasma (He ICP) were measured with a high-resolution Fourier transform spectrometer. These data along with measured intensities of rotational bands, such as B2Σ+u → X2Σ+g of N+2 and A2Σ+→ X2Πi of OH, were used to estimate excitation, rotational, and Doppler temperatures, and electron number densities. Similar to an Ar ICP, the widths of Fe lines ranged from 3 to 4 pm. The line widths of H and He lines in the spectra from a dry He ICP generally were larger than those observed from a wet plasma. The line-width data for H were used to evaluate electron number densities in wet and dry He ICP discharges. The excitation temperature of He ICP was dependent upon the energy levels of the selected thermometric species. The rotational temperatures measured from OH (3000 K) and N+2 (2200 K) were substantially different from those of an Ar ICP. The presence of water in the aerosol resulted in an increase in the excitation temperature of the He ICP, similar to the trend observed earlier for the Ar ICP. The implications of these results in He ICP spectrochemical analysis are discussed" @default.
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- W1997933879 date "1994-09-01" @default.
- W1997933879 modified "2023-09-26" @default.
- W1997933879 title "Fundamental properties of helium inductively coupled plasmas measured by high-resolution Fourier transform spectrometry" @default.
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- W1997933879 doi "https://doi.org/10.1016/0584-8547(94)80093-6" @default.
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