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Showing below up to 4 results in range #21 to #24.

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21. Line triplet for He-like ions‏‎ (2 categories)
22. What are "forbidden" lines?‏‎ (2 categories)
23. Atomic Databases: General idea and limitations‏‎ (2 categories)
24. Common lines in the X-rays: K α, He α, Ly α‏‎ (2 categories)

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