Electron-impact excitation of highly charged berylliumlike ions with inclusion of configuration mixing

Physics – General Physics

Scientific paper

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Beryllium, Electron Impact, High Temperature Plasmas, Ionic Collisions, Metal Ions, Configurations, Electron Energy, Electron Spin, Heavy Elements, Mixing

Scientific paper

By applying Burgess' method (1970) and Layzer's configuration mixing theory (1959) to the consideration of berylliumlike ions in the limit of the nuclear charge number approaching infinity electron-impact scaled collision strengths are obtained for a large number of transitions involving configuration-mixed initial and final states (either or both). When these results are compared with the corresponding nonconfiguration-mixed results it is found that the effect of configuration mixing is usually small (less than about 30%), but in a very few cases it is large, resulting in a change in the collision strength by about a factor of two. The results are pertinent to the study of high-temperature plasmas containing moderately heavy elements.

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