Values of 272 branching ratios are determined for 98 ArII levels which include 5s, 6s, 4p, 5p, 4d, 5d, 4f and 5f levels. Among them, 178 branching ratios are not given in the NBS's table. Spectral intensities of ArII lines were measured in the wavelength range from 500 nm to 200 nm using a hollow cathode glow discharge as a light source. Values of the branching ratio agree with those obtained by Danzmann and Kock within ±5%.
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Hashiguchi et al. (1985) studied this question.
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