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A new determination of the Beutler-Fano parameters for the 3s3p 1 P 1 resonance in helium by the measurement of He + ions does not confirm the earlier measurements of the Fano correlation coefficient rho 2 and the linewidth Gamma made by Dhez and Ederer (1973). However, there is good agreement with recent experimental data of Lindle et al (1987). As a consequence, the need for improved theoretical calculations is indicated.
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Kossmann et al. (1988) studied this question.
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