The spectroscopic characteristics of multicharged ions contain important information about plasma macroparameters (electron and ion temperature and density, charge-state distribution, etc.) and, therefore, provide an important diagnostic tool for the investigation of hot laboratory and astrophysical plasmas. The need of recommended data for different physical applications has lead to the creation of several large atomic data banks organized for storage and exchange of radiative and collisional characteristics of multicharged ions.
In the present paper, we have extended earlier works [1-3] and report new results of precise calculations for the spectral characteristics of one- and two-electron highly charged ions (energy levels, Lamb shift, transition probabilities and oscillator strengths, etc). The general approach of our method has already been described [1-3] elsewhere. In addition, new calculations include the consecutive estimates for the higher-order corrections on the basis of relativistic and QED-theories: one- and two-loop ladder diagrams for self-energy and vacuum polarization, relativistic recoil corrections, etc). The total number of transitions is more than 100000. These new results are realized in part in our Institute VNIIFTRI at database “SPECTR-WWW” and in Herzberg Institute of Astrophysics at NRC (Canada).

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