Abstract
The open M-shell opacity of a hot bromine plasma has beencalculated by using a detailed level accounting (DLA) model.One-electron orbitals obtained by solving the fully relativisticDirac–Fock equations are used to obtain the atomic levels and theradiative transition oscillator strengths. Only the level mixingwithin the same electron configuration is considered to reduce thecomplexity of the calculations. Detailed comparisons have beenmade between the results of the DLA and average atom (AA) models.Good agreements are found for both the M-shell transition arraysand the Planck mean opacity but there are differences for the linepositions in the 2p→3d absorption region due to thestatistical treatment for the one-electron orbitals in the AA model.
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