The beam-foil method has been used for spectral studies of aluminum in the wavelength region 1 800-7 000 Å. Most of the lines were from Al III and Al IV, and several hydrogenic transitions were identified in Al IV-Al VI. Mean lives of 10 excited states in Al III are presented. Correction for analyzed main cascades has been applied when possible. In general, good agreement was found with earlier experimental results and theoretical estimates. The cascade correction method was also tested with simulated decay curves and proved to give a better estimate of the lifetime than the multiexponential fit.
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Weckström et al. (1976) studied this question.
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