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RESEARCH PRODUCT

Relative Transition Probability Measurements for Prominent Infrared Spectral Lines of NI

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description

Applying a high-current wall-stabilized arc operated either in helium or in argon always with some admixtures of nitrogen, relative transition probabilities for more than 100 individual spectral lines (fine structure components) have been measured. The studied lines belong mainly to the 3p–3d and 3p–4s transition arrays. Ten lines of the measured set are intersystem transitions. Our data are compared with other experimental results (for about one half of the studied set there are available), with evaluated on the basis of the LS coupling scheme, with semiempirical data, and with recent CIV3 calculations. Some of our results are compared also with experimental data for the next member of the isoelectronic sequence (OII). Our new data on relative line strengths of NI may be very useful for interpretation of stellar spectra and helpful for the improvement of atomic structure codes, used in theoretical approaches devoted to oscillator strengths calculations.