Spectrum Simulation of Li-like Oxygen Plasma

摘要

Based on the collisional radiative model from the FAC (flexible atomic code), X-ray emission spectra for L-shell of Li-like oxygen plasma consisting of three kinds of oxygen ions (Li-like oxygen ion and another two neighboring ions ) are simulated. Atomic processes in the model include dielectronic recombination (DR), radiative recombination (RR), collisional ionization (CI) and resonance excitation (RE) from the neighbouring ion charge states of the target ion (Li-like oxygen ion). To analyse the contribution of different atomic processes to the X-ray spectrum, the results show that DR, RR, CI and RE , other than direct collisional excitation, are very important processes. In addition, the spectrum reflects the relationship between X-ray wavelengths, relatively radiative intensity and the electronic temperature, which could be qualitatively used to plasmas diagnostics.