“…Then, by combining the model-QED method, the QED effects are studied in detail. Finally, the hyperfine structure constants of 2l, 3l states of Li-like 20,21,22 Ne 7+ , 23,24,25,26 Mg 9+ , 26,27,28 Al 10+ , 31.32 P 12+ , 35,37,39,40 Ar 15+ and 41,42,43,44,47 Ca 17+ ions are calculated.…”