Experimental measurement of the C II L-shell photoabsorption spectrum

The photoabsorption spectrum of the C II ion has been experimentally observ ed using the technique of the two-laser generated plasmas. In this way, bot h the discrete spectrum, with the series of resonance lines converging to t he ionization threshold, and the photoionization cross section above the fi rst limit have been measured. Beyond the threshold the cross section shows several resonances corresponding to S-2 and D-2 Open channels and lines cor responding to P-2 closed channels. [S1050-2947(98)00712-4].