Time-resolved extreme ultraviolet photoabsorption spectra of a manganese plasma have been recorded using the dual laser plasma technique. The $43–73\mathrm{eV}$ photon energy range is dominated by the $3p\text{−}3d$ giant resonance and to a lesser extent the $3p\text{−}4s$ resonances in both ${\mathrm{Mn}}^{2+}$ and ${\mathrm{Mn}}^{3+}$, recorded at interplasma time delays of 80 and $30\mathrm{ns}$, respectively. These experimentally observed resonances are well reproduced by synthetic spectra calculated using the Hartree-Fock method. The synthetic spectra allow for absorption from excited states of the ${\mathrm{Mn}}^{2+}$ and ${\mathrm{Mn}}^{3+}$ ions.

• Received 9 February 2007

DOI:https://doi.org/10.1103/PhysRevA.75.062503