The dielectronic satellite lines from the $1s2l_{a}3l_b$ and $1s3l_{a}3l_b$ doubly excited configurations of lithiumlike ions have been studied experimentally and theoretically under dense-plasma conditions. Good agreement between theory and high spectral-resolution measurements performed in laser-target interactions at 0.53-μm wavelength, ${10}^{14}$ W/${\mathrm{cm}}^2$ laser irradiance show that collisional equilibrium conditions are reached between $n=3\mathrm{}$ singly and doubly excited levels at electron densities greater than ${10}^{22}$ ${\mathrm{cm}}^{-3\mathrm{}}$ in Al and Si.

• Received 12 June 1984

DOI:https://doi.org/10.1103/PhysRevA.30.1582