Abstract
The radiative opacity of a gold plasma at a temperature of 360 eV and adensity of 0.01 g/cm3 has been studied using a detailed levelaccounting (DLA) method. Under this plasma condition, the averageionization degree is 50.2. Dominant ion types in the plasma areAu+49, Au+50 and Au+51, which account for 18.3%, 33.1%and 32.6%, respectively. The spectrally resolved opacity shows complexfine structures. The result obtained by the DLA method is compared withthat of the average atom model. Detailed analyses are carried out tostudy the strongest absorption peaks caused by 3d−4f transitions nearthe photon energy of 2600 eV. To better understand the value of theRosseland mean opacity, the radiative opacity around the energy regionof the maximal Rosseland weighting function is also discussed in detail.
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