Absorption Spectra from 1s Inner Shell Electron of Ionized and Neutral Carbon

By using the technique of two laser-produced plasmas we have obtained the absorption spectra and the relative photoionization continua of ionized and neutral carbon in the soft X-ray region. In this spectral range (25-45 Å), the absorption is due to the 1s inner shell electron. The CV absorption spectrum has been completely analyzed in a previous work and is reported here only as a reference spectrum for the CIV and CIII spectra. A preliminary analysis of the CIV is reported. Finally the absorption spectra and the relative photoionization continua of neutral carbon are presented in three different states, solid, vapour (clusters) and CI atoms.